simcom sim908 hardware design 1.00
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8/9/2019 SIMCom SIM908 Hardware Design 1.00
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SIM908_Hardware Design_V1.00
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Document Title SIM908 Hardware Design
Version 1.00
Date 2011-06-28
Status Release
Document Control ID SIM908_Hardware Design_V1.00
General Notes
SIMCom offers !is informaion as a ser"i#e o is #$somers% o s$&&or a&&li#aion and engineering effors !a
$se !e &rod$#s designed '( SIMCom. )!e informaion &ro"ided is 'ased $&on re*$iremens s&e#ifi#all(
&ro"ided o SIMCom '( !e #$somers. SIMCom !as no $ndera+en an( inde&enden sear#! for addiional
rele"an informaion% in#l$ding an( informaion !a ma( 'e in !e #$somer,s &ossession. $r!ermore% s(sem
"alidaion of !is &rod$# designed '( SIMCom wi!in a larger ele#roni# s(sem remains !e res&onsi'ili( of
!e #$somer or !e #$somer,s s(sem inegraor. ll s&e#ifi#aions s$&&lied !erein are s$'/e# o #!ange.
Copyright
)!is do#$men #onains &ro&riear( e#!ni#al informaion w!i#! is !e &ro&er( of SIMCom imied% #o&(ing of
!is do#$men and gi"ing i o o!ers and !e $sing or #omm$ni#aion of !e #onens !ereof% are for'idden
wi!o$ e&ress a$!ori(. ffenders are lia'le o !e &a(men of damages. ll rig!s reser"ed in !e e"en of
gran of a &aen or !e regisraion of a $ili( model or design. ll s&e#ifi#aion s$&&lied !erein are s$'/e# o
#!ange wi!o$ noi#e a an( ime.
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2011
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Contents
Contents#################################################################################################################################################################### '
Version History###################################################################################################################################################### 9
" Introuction###################################################################################################################################################### "0
$ SIM908 ()er)ie!############################################################################################################################################### "0
2.1 SIM908 3e( ea$res................................................................................................................................. 10
2.2 &eraing Modes............................................................................................................................................ 14
2.4 SIM908 $n#ional Diagram....................................................................................................................... 15
' *ac+age In,ormation######################################################################################################################################## "-
4.1 in o$ Diagram............................................................................................................................................ 17
4.2 in Des#ri&ion............................................................................................................................................ 16
4.4 a#+age Dimensions..................................................................................................................................... 18
4.5 Me#!ani#al dimensions of !e R #onne#or............................................................................................... 19
. GSM /pplication Inter,ace############################################################################################################################## $0
5.1 ower S$&&l(............................................................................................................................................... 20
5.1.1 Minimiing Volage Dro& of V)...................................................................................................... 21
5.1.2 Monioring ower S$&&l(....................................................................................................................... 21
5.2 ower on:down S#enarios.............................................................................................................................. 22
5.2.1 ower on SIM908................................................................................................................................. 22
5.2.2 ower down SIM908.............................................................................................................................. 24
5.2.4 Resar SIM908 '( ;R3<= in......................................................................................................... 27
5.4 ower Sa"ing Mode..................................................................................................................................... 26
5.4.1 Minim$m $n#ionali( Mode................................................................................................................ 26
5.4.2 Slee& Mode 1 >)?CSC3@1A............................................................................................................. 26
5.4.4 ;a+e B& SIM908 from Slee& Mode 1 >)?CSC3@1A....................................................................... 2
5.4.5 Slee& Mode 2 >)?CSC3@2A............................................................................................................. 2
5.4.7 ;a+e B& SIM908 from Slee& Mode 2 >)?CSC3@2A....................................................................... 2
5.5 C!arging inerfa#e ..................................................................................................................................... 2
5.5.1 aer( &a#+ #!ara#erisi#s .................................................................................................................... 28
5.5.2 Re#ommended 'aer( &a#+.................................................................................................................... 28
5.5.4 Im&lemened #!arging e#!ni*$e......................................................................................................... 29
5.5.5 &eraing modes d$ring #!arging......................................................................................................... 29
5.5.7 C!arger re*$iremens.............................................................................................................................. 40
5.7 R)C a#+$&................................................................................................................................................... 41
5.6 Serial Inerfa#es............................................................................................................................................ 42
5.6.1 $n#ion of Serial or and De'$g or.................................................................................................. 44
5.6.2 Sofware B&grade and De'$g................................................................................................................ 45
5. $dio Inerfa#es............................................................................................................................................ 45
5..1 S&ea+er Inerfa#e Config$raion............................................................................................................. 47
5..2 Mi#ro&!one Inerfa#es Config$raion.................................................................................................. 475..4 <ar&!one Inerfa#e Config$raion......................................................................................................... 46
5..5 $dio <le#roni# C!ara#erisi#s............................................................................................................. 46
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5.8 SIM Card Inerfa#e........................................................................................................................................ 4
5.8.1 SIM Card &&li#aion.............................................................................................................................. 4
5.8.2 Design Consideraions for SIM Card Holder........................................................................................ 48
5.9 CD Dis&la(:SI Inerfa#e.......................................................................................................................... 49
5.10 3e(&ad Inerfa#e........................................................................................................................................ 50
5.11 DC............................................................................................................................................................. 50
5.12 RI e!a"iors............................................................................................................................................... 515.14 ewor+ Sa$s Indi#aion.......................................................................................................................... 52
5.15 Eeneral $r&ose In&$:$&$ >EIA...................................................................................................... 54
5.17 ;M.......................................................................................................................................................... 54
5.16 I2C $s...................................................................................................................................................... 54
5.1 ESM nenna Inerfa#e.............................................................................................................................. 54
- G*S /pplication Inter,ace############################################################################################################################## ..
7.1 ES o&eraing modes..................................................................................................................................... 57
7.2 ower on:down S#enarios.............................................................................................................................. 57
7.2.1 ower on ES engine.............................................................................................................................. 577.2.2 ower down ES engine....................................................................................................................... 57
7.4 ES-V)-B) and ES-V)-I......................................................................................................... 57
7.5 nenna Inerfa#e........................................................................................................................................ 57
7.5.1 nenna Inerfa#e..................................................................................................................................... 57
7.5.2 ES nenna C!oi#e Consideraion...................................................................................................... 56
& lectrical1 2elia3ility an 2aio Characteristics########################################################################################### .4
6.1 'sol$e Maim$m Raings.......................................................................................................................... 5
6.2 Re#ommended &eraing Condiions......................................................................................................... 5
6.4 Digial Inerfa#e C!ara#erisi#s................................................................................................................... 586.5 SIM Card Inerfa#e C!ara#erisi#s............................................................................................................. 58
6.7 VDD_<F) C!ara#erisi#s.......................................................................................................................... 58
6.6 SIM_VDD C!ara#erisi#s.......................................................................................................................... 59
6. VR)C C!ara#erisi#s..................................................................................................................................... 59
6.8 C$rren Cons$m&ion >V) @ 4.8V% ES engine is &owered downA......................................................... 59
6.9 <le#ro-Sai# Dis#!arge.............................................................................................................................. 70
6.10 Radio C!ara#erisi#s................................................................................................................................. 71
6.10.1 Mod$le R $&$ ower.................................................................................................................... 71
6.10.2 Mod$le R Re#ei"e Sensii"i(............................................................................................................. 72
6.10.4 Mod$le &eraing re*$en#ies............................................................................................................. 72
4 Manu,acturing################################################################################################################################################### -'
.1 )o& View of SIM908..................................................................................................................................... 74
.2 )(&i#al Solder Reflow rofile....................................................................................................................... 75
.4 Mois$re Sensii"i( e"el >MSA................................................................................................................ 75
/ppeni5############################################################################################################################################################# --
. Relaed Do#$mens........................................................................................................................................ 77
. )erms and ''re"iaions.............................................................................................................................. 76
C. Safe( Ca$ion............................................................................................................................................... 7
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Ta3le Ine5
Ta3le "6 SIM908 GSM7G*2S engine +ey ,eatures########################################################################################### "0
Ta3le $6 G*S engine *er,ormance####################################################################################################################### "$
Ta3le '6 Coing schemes an ma5imum net ata rates o)er air inter,ace##################################################### "$
Ta3le .6 ()er)ie! o, operating moes################################################################################################################ "'
Ta3le -6 *in escription######################################################################################################################################## "&
Ta3le &6 The Current consumption o, Minimum unctionality Moe############################################################ $&
Ta3le 46 Speci,ication o, recommene 3attery pac+######################################################################################## $8
Ta3le 86 Charge operating moes####################################################################################################################### '0
Ta3le 96 /T Comman usually use in Charge%only moe############################################################################## '0
Ta3le "06 Microphone Input Characteristics###################################################################################################### '&
Ta3le ""6 /uio (utput Characteristics############################################################################################################# '&
Ta3le "$6 *in escription /mphenol SIM car holer:################################################################################# '8
Ta3le "'6 *in escription Mole5 SIM car holer:######################################################################################## '9
Ta3le ".6 *in e,inition o, the +eypa inter,ace############################################################################################### .0
Ta3le "-6 /DC speci,ication################################################################################################################################# ."
Ta3le "&6 2I ;eha)iors######################################################################################################################################## ."
Ta3le "46 Status o, the NT<IGHT pin############################################################################################################# .$
Ta3le "86 *in e,inition o, the G*I( inter,ace################################################################################################## .'
Ta3le "96 *in e,inition o, the G*I( inter,ace################################################################################################## ..
Ta3le $06 /3solute ma5imum ratings################################################################################################################ .4
Ta3le $"6 2ecommene operating conitions################################################################################################## .4
Ta3le $$6 Digital inter,ace characteristics######################################################################################################### .8
Ta3le $'6 SIM car inter,ace characteristics###################################################################################################### .8
Ta3le $.6 VDD_=T characteristics#################################################################################################################### .8
Ta3le $-6 SIM_VDD characteristics#################################################################################################################### .9
Ta3le $&6 V2TC characteristics########################################################################################################################### .9
Ta3le $46 GSM Current consumption################################################################################################################ .9
Ta3le $86 The SD characteristics Temperature6 $- 1 Humiity6 .- >:℃ ################################################## -0
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Ta3le $96 SIM908 GSM 900 an GSM 8-0 conucte 2 output po!er##################################################### -"
Ta3le '06 SIM908 DCS "800 an *CS "900 conucte 2 output po!er##################################################### -"
Ta3le '"6 SIM908 conucte 2 recei)e sensiti)ity######################################################################################## -$
Ta3le '$6 SIM908 operating ,re?uencies############################################################################################################# -'
Ta3le ''6 2elate ocuments############################################################################################################################## --
Ta3le '.6 Terms an /33re)iations#################################################################################################################### -&
Ta3le '-6 Sa,ety caution######################################################################################################################################## -4
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igure Ine5
igure "6 SIM908 ,unctional iagram################################################################################################################ ".
igure $6 SIM908 pin out iagram Top )ie!:################################################################################################## "-
igure '6 Dimensions o, SIM908 ( @nit6 mm) #################################################################################### "8
igure .6 2ecommene *C; ,ootprint outline ( @nit6 mm) ############################################################ "9
igure -6 @#<%2%SMT @nit6mm:#################################################################################################################### $0
igure &6 @#< series 2 aapter ca3le @nit6mm:########################################################################################### $0
igure 46 2e,erence circuit o, the <D( po!er supply#################################################################################### $0
igure 86 2e,erence circuit o, the DC%DC po!er supply################################################################################# $"
igure 96 V;/T )oltage rop uring transmit 3urst######################################################################################## $"
igure "06 The minimal V;/T )oltage re?uirement at V;/T rop################################################################ $"
igure ""6 *o!ere on7o!n moule using transistor#################################################################################### $$
igure "$6 *o!ere on7o!n moule using 3utton########################################################################################### $$
igure "'6 Timing o, po!er on moule############################################################################################################# $'
igure ".6 Timing o, po!er o!n SIM908 3y *A2B################################################################################# $.
igure "-6 Timing o, restart SIM908################################################################################################################ $&
igure "&6 SIM908 !ith 3attery charger an pac+ connection####################################################################### $8
igure "46 2TC supply ,rom capacitor############################################################################################################# '"
igure "86 2TC supply ,rom non%chargea3le 3attery#################################################################################### '"
igure "96 2TC supply ,rom rechargea3le 3attery########################################################################################### '"
igure $06 Sei+o =H.".H%IV0" Charge%Discharge Characteristic############################################################ '$
igure $"6 Connection o, the serial inter,aces################################################################################################## '$
igure $$6 Connection o, 2=D an T=D only################################################################################################## ''
igure $'6 Connection ,or so,t!are upgraing an e3ugging####################################################################### '.
igure $.6 Spea+er re,erence circuit#################################################################################################################### '-
igure $-6 Spea+er !ith ampli,ier re,erence circuit######################################################################################## '-
igure $& 6 Microphone re,erence circuit######################################################################################################### '-
igure $46 arphone re,erence circuit################################################################################################################ '&
igure $86 2e,erence circuit o, the 8%pin SIM car holer############################################################################## '4
igure $96 2e,erence circuit o, the &%pin SIM car holer############################################################################## '8
igure '06 /mphenol C404 "0M00& -"$$ SIM car holer############################################################################## '8
igure '"6 Mole5 9"$$8 SIM car holer######################################################################################################### '9
igure '$6 2e,erence circuit o, the +eypa inter,ace######################################################################################## .0
igure ''6 2I 3eha)iour o, )oice calling as a recei)er#################################################################################### ."
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igure '.6 2I 3eha)iour o, ata calling as a recei)er######################################################################################## ."
igure '-6 2I 3eha)iour o, @2C or recei)e SMS############################################################################################### .$
igure '&6 2I 3eha)iour as a caller#################################################################################################################### .$
igure '46 2e,erence circuit o, NT<IGHT###################################################################################################### .$
igure '86 /ntenna matching circuit################################################################################################################ ..
igure '96 /ntenna matching circuit################################################################################################################ .&
igure .06 Top )ie! o, SIM908########################################################################################################################### -'
igure ."6 Typical Soler 2e,lo! *ro,ile######################################################################################################### -.
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Version History
Date Version Description o, change /uthor
2011-06-28 1.00 rigin iEang
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" Introuction
)!is do#$men des#ri'es SIM908 !ardware inerfa#e in grea deail.
)!is do#$men #an !el& $ser o *$i#+l( $ndersand SIM908 inerfa#e s&e#ifi#aions% ele#ri#al and me#!ani#al
deails. ;i! !e !el& of !is do#$men and o!er SIM908 a&&li#aion noes% $ser g$ide% $sers #an $se SIM908 o
design "ario$s a&&li#aions *$i#+l(.
$ SIM908 ()er)ie!
Designed for glo'al mar+e% SIM908 is inegraed wi! a !ig! &erforman#e ESM:ERS engine and a ES
engine. )!e ESM:ERS engine is a *$ad-'and ESM:ERS mod$le !a wor+s on fre*$en#ies ESM 870MH%
<ESM 900MH% DCS 1800MH and CS 1900MH. SIM908 fea$res ERS m$li-slo #lass 10: #lass 8
>o&ionalA and s$&&ors !e ERS #oding s#!emes CS-1% CS-2% CS-4 and CS-5. )!e ES sol$ion offers 'es- in-
#lass a#*$isiion and ra#ing sensii"i(% )ime-)o-irs-i >))A and a##$ra#(.
;i! a in( #onfig$raion of 40G40G4.2mm% SIM908 #an mee almos all !e s&a#e re*$iremens in $ser
a&&li#aions% s$#! as M2M% smar &!one% D% ra#+er and o!er mo'ile de"i#es.
SIM908 !as 80 SM) &ads% and &ro"ides all !ardware inerfa#es 'eween !e mod$le and #$somers, 'oards.
Serial &or and de'$g &or #an !el& $ser easil( de"elo& $ser,s a&&li#aions.
ES Serial &or.
)wo a$dio #!annels in#l$de wo a$dio in&$s and wo a$dio o$&$s. )!ese #an 'e easil( #onfig$red '( )
#ommand.
C!arging inerfa#e.
rogramma'le general &$r&ose in&$ and o$&$.
)!e +e(&ad and SI dis&la( inerfa#es will gi"e $sers !e flei'ili( o de"elo& #$somied a&&li#aions.
R &ad and #onne#or inerfa#e.
SIM908 is designed wi! &ower sa"ing e#!ni*$e so !a !e #$rren #ons$m&ion is as low as 1.0m in slee&
mode >ES engine is &owered downA.
SIM908 inegraes )C:I &roo#ol and eended )C:I ) #ommands w!i#! are "er( $sef$l for daa ransfer
a&&li#aions. or deails a'o$ )C:I a&&li#aions% &lease refer o document [2].
2.1 SIM908 Bey eatures
Ta3le " 6 SIM908 GSM7G*2S engine +ey ,eatures
eature Implementation
ower s$&&l( 4.2V 5.8V
ower sa"ing )(&i#al &ower #ons$m&ion in slee& mode is 1.0m > S--MRMS@9% ES
engine is &owered down A
C!arging S$&&ors #!arging #onrol for i-Ion 'aer(
re*$en#( 'ands SIM908 $ad-'andJ ESM 870% <ESM 900% DCS 1800% CS 1900. SIM908
#an sear#! !e 5 fre*$en#( 'ands a$omai#all(. )!e fre*$en#( 'ands also #an
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'e se '( ) #ommand K)?CDL. or deails% &lease refer o document
[1].
Com&lian o ESM !ase 2:2?
)ransmiing &ower Class 5 >2;A a ESM 870 and <ESM 900
Class 1 >1;A a DCS 1800 and CS 1900
ERS #onne#i"i( ERS m$li-slo #lass 10( defa$l )
ERS m$li-slo #lass 8 >o&ionA
)em&era$re range ormal o&eraionJ -40C ?80C
Resri#ed o&eraionJ -50C -40C and ?80 C ?87CG
Sorage em&era$re -57C ?90C
Daa ERS ERS daa downlin+ ransferJ ma. 87.6 +'&s
ERS daa $&lin+ ransferJ ma. 52.8 +'&s
Coding s#!emeJ CS-1% CS-2% CS-4 and CS-5
Inegrae !e )C:I &roo#ol.
S$&&or a#+e road#as Conrol C!annel >CCHA
CSD S$&&or CSD ransmission
BSSD Bnsr$#$red S$&&lemenar( Ser"i#es Daa >BSSDA s$&&or
SMS M)% M% C% )e and DB mode
SMS sorageJ SIM #ard
F Ero$& 4 Class 1
SIM inerfa#e S$&&or SIM #ardJ 1.8V% 4V
<ernal anenna nenna &ad
$dio fea$res S&ee#! #ode# modesJ
Half Rae ><)S 06.20A
$ll Rae ><)S 06.10A
<n!an#ed $ll Rae ><)S 06.70 : 06.60 : 06.80A
da&i"e m$li rae >MRA
<#!o Can#ellaion
oise S$&&ression
Serial &or and
de'$g &or
Serial port6
$ll modem inerfa#e wi! sa$s and #onrol lines% $n'alan#ed% as(n#!rono$s.
1200'&s o 117200'&s.
Can 'e $sed for ) #ommands or daa sream.
S$&&or R)S:C)S !ardware !ands!a+e and sofware : flow #onrol.
M$li&le a'ili( a##ording o ESM 0.10 M$li&leer roo#ol.
$o'a$ding s$&&ors 'a$d rae from 1200 '&s o 7600'&s.
De3ug port6
$ll modem inerfa#e ES:DE_)FD and ES:DE_RFD.
Can 'e $sed for de'$gging and $&grading firmware.
!one'oo+ managemen S$&&or &!one'oo+ (&esJ SM% D% D% RC% % MC.
SIM a&&li#aion ool+i ESM 11.15 Release 99
Real ime #lo#+ S$&&or R)C
!(si#al #!ara#erisi#s SieJ 40G40G4.2mm
;eig!J 7.2g
irmware $&grade irmware $&gradea'le '( de'$g &or.
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$#$ (perating Moes
)!e a'le 'elow s$mmaries !e "ario$s o&eraing modes of SIM908.
Ta3le . 6 ()er)ie! o, operating moes
Moe unction
ormal
o&eraion
ESM:ERS
S<<
Mod$le will a$omai#all( go ino slee& mode if !e #ondiions of slee&
mode are ena'ling and !ere is no on air and no !ardware inerr$& >s$#! as
EI inerr$& or daa on serial &orA.
In !is #ase% !e #$rren #ons$m&ion of mod$le will red$#e o !e minimal
le"el.
In slee& mode% !e mod$le #an sill re#ei"e &aging message and SMS.
ESM
ID<
Sofware is a#i"e. Mod$le regisered o !e ESM newor+% and !e mod$le
is read( o #omm$ni#ae.
ESM
)3
Conne#ion 'eween wo s$'s#ri'ers is in &rogress. In !is #ase% !e &ower
#ons$m&ion de&ends on newor+ seings s$#! as D)F off:on%
R:<R:HR% !o&&ing se*$en#es% anenna.
ERS
S)D=
Mod$le is read( for ERS daa ransfer% '$ no daa is #$rrenl( sen or
re#ei"ed. In !is #ase% &ower #ons$m&ion de&ends on newor+ seings and
ERS #onfig$raion.
ERS
D)
)!ere is ERS daa ransfer > or )C or BDA in &rogress. In !is #ase%
&ower #ons$m&ion is relaed wi! newor+ seings >e.g. &ower #onrol
le"elAN $&lin+:downlin+ daa raes and ERS #onfig$raion >e.g. $sed m$li-
slo seingsA.
ower down ormal &ower down '( sending !e ) #ommand K)?C;D@1L or $sing !e ;R3<=.
)!e &ower managemen $ni s!$s down !e &ower s$&&l( for !e 'ase'and &ar of !e
mod$le% and onl( !e &ower s$&&l( for !e R)C is remained. Sofware is no a#i"e. )!e
serial &or is no a##essi'le. ower s$&&l( >#onne#ed o V)A remains a&&lied.
Minim$m
f$n#ionali(
mode
) #ommand K)?CBL #an 'e $sed o se !e mod$le o a minim$m f$n#ionali( mode
wi!o$ remo"ing !e &ower s$&&l(. In !is mode% !e R &ar of !e mod$le will no wor+ or
!e SIM #ard will no 'e a##essi'le% or 'o! R &ar and SIM #ard will 'e #losed% and !e
serial &or is sill a##essi'le. )!e &ower #ons$m&ion in !is mode is lower !an normal
mode.C!arge-onl(
mode
)!e mod$le will ener C!arge-onl( mode a$omai#all( w!en a #!arger and 'aer( are
#onne#ed o a swi#!ed-off SIM908. In !is mode% !e mod$le does no sear#! for newor+
and !as limied a##ess o a"aila'le ) #ommands a"aila'le. )!e mod$le #an also ener
C!arge-onl( mode from C!arge mode d$ring normal o&eraion '( normall( &owered down
!e mod$le.
C!arge mode
d$ring normal
o&eraion
)!e mod$le will a$omai#all( go o !is mode w!en a #!arger is #onne#ed o a ormal
o&eraion mode mod$le w!en 'aer( "olage is no lower !an 4.2V. ormal o&eraion mode
in#l$desJ S<<% ID<% )3% ERS ID< and ERS D).
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2.3 SIM908 unctional Diagram
)!e following fig$re s!ows a f$n#ional diagram of SIM908J )!e ESM 'ase'and engine
)!e ES engine
las!
)!e ESM radio fre*$en#( &ar
)!e anenna inerfa#e
)!e o!er inerfa#es
igure " 6 SIM908 ,unctional iagram
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' *ac+age In,ormation
3.1 *in out Diagram
igure $ 6 SIM908 pin out iagram Top )ie!:
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3.2 *in Description
Ta3le - 6 *in escription
*in name *in num3er I7( Description Comment
*o!er supply
V) 62% 64 I ower s$&&l( 4.2V 5.8V
VR)C 52 I: ower s$&&l( for R)C I is re#ommended o
#onne# wi! a 'aer( or
a #a&a#ior >e.g. 5.$A.
VDD-<F) 55 2.8V o$&$ &ower s$&&l( If i is $n$sed% +ee& o&en.
ES-V)-
B)
7 2.8V o$&$ for ES a#i"e anenna If i is $n$sed% +ee& o&en.
ES-V)-I 6 I ES a#i"e anenna &ower s$&&l( If i is $n$sed% +ee& o&en.
ED 1% 2% 7% 10% 15% 4%
50% 51% 54% 7% 78%
60% 61% 65% 67% %8% 80
Ero$nd
Charge inter,ace
VCHE 5 I C!arger in&$
)<M_) 4 I aer( em&era$re sensor
*o!er on7o!n
;R3<= 4 I ;R3<= s!o$ld 'e &$lled low a
leas 1 se#ond and !en released o
&ower on:down !e mod$le.
$lled $& inernall(.
/uio inter,aces
MIC1 24 I Differenial a$dio in&$ If !ese &ins are $n$sed%
+ee& o&en.MIC1 25
S31 22 Differenial a$dio o$&$
S31 21
MIC2 2 I Differenial a$dio in&$
MIC2 28
S32 27 Differenial a$dio o$&$
S32 26Status
S))BS 72 ower on sa$s If !ese &ins are $n$sed%
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+ee& o&en. <)IEH) 71 ewor+ sa$s
<CD inter,ace
DIS -C3 6 Dis&la( inerfa#e If !ese &ins are $n$sed%
+ee& o&en.DIS-D) I:
DIS -D:C 8
DIS -CS 9
I$C inter,ace
I2C-SD 76 I$C serial '$s daa If !ese &ins are $n$sed%
+ee& o&en.I2C-SC 77 I: I$C serial '$s #lo#+
Beypa inter,ace 7 G*I(s
EI1:3R0 41 I: EI1:+e(&ad row 0 If !ese &ins are $n$sed%
+ee& o&en.EI2:3R1 42 EI2:+e(&ad row 1
EI4:3R2 44 EI4:+e(&ad row 2
EI5:3C0 45 EI5:+e(&ad #ol$mn 0
EI7:3C1 47 EI7:+e(&ad #ol$mn 1
EI6:3C2 46 EI6:+e(&ad #ol$mn 4
Serial port
RFD 68 I Re#ei"e daa If onl( )FD and RFD
are $sed% i is s$ggesed
o &$ll down D)R% and
o!ers &ins #an 'e +e&
o&en.
)FD 1 )ransmi daa
R)S 66 Re*$es o send
C)S 6 I Clear o send
DCD 0 Daa #arrier dee#
RI 69 Ring indi#aor
D)R 2 I Daa erminal read(
G*S7De3ug inter,ace
ES:DE-)FD 17 or ES M< informaion o$&$ %
de'$gging and $&grading firmware
If !ese &ins are $n$sed%
+ee& o&en.ES:DE-RFD 16 I
SIM inter,ace
SIM-VDD 20 Volage s$&&l( for SIM #ard.
S$&&or 1.8V or 4V SIM #ard
ll signals of SIM
inerfa#e s!o$ld 'e
&roe#ed agains <SDwi! a )VS diode arra(.
SIM-D) 1 I: SIM daa in&$:o$&$
SIM-C3 19 SIM #lo#+
SIM-RS) 18 SIM rese
/DC
DC 5 I In&$ "olage rangeJ 0V 2.8V If i is $n$sed% +ee& o&en.
*ulse !ith moulation *AM :
;M1 58 ;M If !ese &ins are $n$sed%
+ee& o&en.;M2 59 ;M
;M4 70 ;M
GSM7G*S 2 inter,ace
ESM-) 79 I: ESM radio anenna #onne#ion Im&enden#e m$s 'e
#onrolled o 70O.
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ES-) 9 I ES radio anenna #onne#ion Im&enden#e m$s 'e
#onrolled o 70O.
Not connect
C 2%6 - )!ese &ins s!o$ld 'e
+e& o&en.
'#' *ac+age Dimensions
BOTTOM VIEWTOP VIEW
ig$re 4 J Dimensions of SIM908( BniJ mm)
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igure . 6 2ecommene *C; ,ootprint outline
@nit6 mm
3.4 Mechanical imensions o, the 2 connector
)!e R #onne#or in !e mod$le side is an $lra small s$rfa#e mo$n #oaial #onne#ors >ar $m'erJ B.-R-
SM)% "ended '( HRSA. I !as !ig! &erforman#e wi! wide fre*$en#( range% s$rfa#e mo$na'le and reflows
soldera'le. ollowing fig$re are !e relaed &arameers. Cerainl( $ser #an "isi !&J::www.!irose-
#onne#ors.#om: for more informaion.
)o ge good R &erforman#e in $ser,s design% SIMCom s$ggess $ser o $se !e ma#!ing R ada&er #a'le
w!i#! is also s$&&lied '( HRS >ar $m'erJ B.-( V) -050A% !e following fig$re is !e dimensions
of B. series R ada&er #a'le. Bser #an #ona# SIMCom for more informaion.
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igure 8 6 2e,erence circuit o, the DC%DC po!er supply
)!e single 4.V i-ion #ell 'aer( #an 'e #onne#ed o SIM908 V) &ins dire#l(. $ !e i-Cd or i-MH
'aer( m$s 'e $sed #aref$ll(% sin#e !eir maim$m "olage #an rise o"er !e a'sol$e maim$m "olage of !e
mod$le and damage i.
;!en 'aer( is $sed% !e oal im&edan#e 'eween 'aer( and V) &ins s!o$ld 'e less !an 170mO.)!e following fig$re s!ows !e V) "olage dro& a !e maim$m &ower ransmi &!ase% and !e es #ondiion
is as followingJ
V)@5.0V%
V) '(&ass #a&a#ior C@100P anal$m #a&a#ior ><SR@0.OA%
no!er V) '(&ass #a&a#ior C@1P.
igure 9 6 V;/T )oltage rop uring transmit 3urst
.#"#" Minimiing Voltage Drop o, V;/T
;!en designing !e &ower s$&&l( in $ser,s a&&li#aion% &a( s&e#ial aenion o &ower losses. <ns$re !a !e
in&$ "olage ne"er dro&s 'elow 4.1V e"en w!en #$rren #ons$m&ion rises o 2 in !e ransmi '$rs. If !e
&ower "olage dro&s 'elow 4.1V% !e mod$le ma( 'e s!$ down a$omai#all(. )!e C ra#es from !e V)
&ins o !e &ower s$&&l( m$s 'e wide eno$g! >a leas 60milA o de#rease "olage dro&s in !e ransmi '$rs.
)!e &ower IC and !e '(&ass #a&a#ior s!o$ld 'e &la#ed o !e mod$le as #lose as &ossi'le.
igure "0 6 The minimal V;/T )oltage re?uirement at V;/T rop
.#"#$ Monitoring *o!er Supply
)!e ) #ommand K)?CCL #an 'e $sed o monior !e V) "olage. or deail% &lease refer o document [1].
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4.2 *o!er on7o!n Scenarios
.#$#" *o!er on SIM908
4.2.1.1
Turn on SIM900 @sing the *A2B *in *o!er on:
Bser #an &ower on SIM908 '( &$lling down !e ;R3<= &in for a leas 1 se#ond and release. )!is &in is
alread( &$lled $& o 4V in !e mod$le inernal% so eernal &$ll $& is no ne#essar(. Referen#e #ir#$i is s!own as
'elow.
igure "" 6 *o!ere on7o!n moule using transistor
igure "$ 6 *o!ere on7o!n moule using 3utton
)!e &ower on s#enarios is ill$sraed as following fig$re.
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igure "' 6 Timing o, po!er on moule
;!en &ower on &ro#ed$re is #om&leed% SIM908 will send following BRC o indi#ae !a !e mod$le is read( o
o&erae a fied 'a$d rae.
RDY
)!is BRC does no a&&ear w!en a$o'a$ding f$n#ion is a#i"e.
ote! "ser #an use $% #ommand &$%'I(R)*+ to set a ,i*ed -aud rate and sae the #on,iguration to non/olatile ,lash memory.
$,ter the #on,iguration is saed as ,i*ed -aud rate the Code &RDY+ should -e re#eied ,rom the serial port eery time hen
SIM03 is poered on. 4or details please re,er to the #hapter &$%'I(R+ in do#ument 516.
4.2.1.2
Turn on the SIM908 using the VCHG signal
)!e SIM908 will 'e a$omai#all( $rned on w!en a #!arger is #onne#ed o !e swi#!ed-off SIM908 of w!i#!
V) &in "olage is greaer !an 4.2V. SIM908 will go ino !e C!arge-onl( Mode. In !is mode% !e mod$le
does no regiser o !e newor+% and !as onl( a few ) #ommands a"aila'le.
;!en mod$le is &owered on $sing !e VCHE signal% SIM908 sends o$ res$l #ode as following w!en fied
'a$d rae seJ
RDY
C7$R89/:LY M:D9
;!en $ser dri"es !e ;R3<= of C!arge-onl( mode SIM908 o a low le"el "olage for a &eriod of ime >&lease
refer o 4igure 1; %iming o, poer on moduleA% !e SIM908 will &ower $& and go ino C!arge mode d$ring
normal o&eraion. In !is #ase% SIM908 sends o$ res$l #ode as followingJ
4rom C7$R89/:LY M:D9 to :RM$L M:D9
In C!arge mode d$ring normal o&eraion% all o&eraions and ) #ommands are a"aila'le.
.#$#$ *o!er o!n SIM908
SIM908 will 'e &owered down in !e following si$aions :
ormal &ower down &ro#ed$reJ &ower down SIM908 '( !e ;R3<= &in.
ormal &ower down &ro#ed$reJ &ower down SIM908 '( ) #ommand K)?C;D@1L.
'normal &ower downJ o"er-"olage or $nder-"olage a$omai# &ower down.
'normal &ower downJ o"er-em&era$re or $nder-em&era$re a$omai# &ower down.
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4.2.2.1
*o!er o!n SIM908 3y the *A2B *in
Bser #an &ower down SIM908 '( &$lling down !e ;R3<= &in for a leas 1 se#ond and release. lease refer
o !e &ower on #ir#$i. )!e &ower down s#enario is ill$sraed in following fig$re.
igure ". 6 Timing o, po!er o!n SIM908 3y *A2B
)!is &ro#ed$re ma+es !e mod$le log off from !e newor+ and allows !e sofware o ener ino a se#$re sae o
sa"e daa 'efore #om&leel( s!$ down.
efore !e #om&leion of !e &ower down &ro#ed$re% !e mod$le will send BRCJ
:RM$L (:W9R D:W
!is momen% ) #ommands #an no 'e ee#$ed an( more% and onl( !e R)C is sill a#i"e. ower down
mode #an also 'e indi#aed '( S))BS &in% w!i#! is a low le"el a !is ime.
4.2.2.2
*o!er o!n SIM908 3y /T Comman
SIM908 #an 'e &owered down '( ) #ommand K)?C;D@1L. )!is &ro#ed$re ma+es !e mod$le log off
from !e newor+ and allows !e sofware o ener ino a se#$re sae o sa"e daa 'efore #om&leel( s!$ down.
efore !e #om&leion of !e &ower down &ro#ed$re% !e mod$le will send BRCJ
:RM$L (:W9R D:W
!is momen% ) #ommands #an no 'e ee#$ed an( more% and onl( !e R)C is sill a#i"e. ower down
mode #an also 'e indi#aed '( S))BS &in% w!i#! is a low le"el a !is ime.
or deail a'o$ !e ) #ommand K)?C;DL% &lease refer o document [1]
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4A ower on !e mod$le.
igure "- 6 Timing o, restart SIM908
4.3 *o!er Sa)ing Moe
SIM908 !a"e wo slee& modesJ slee& mode 1 is ena'led '( !ardware &in D)RN slee& mode 2 is onl( ena'led '(serial &or regardless of !e D)R. In slee& mode% !e #$rren of mod$le is "er( low. )!e ) #ommand
K)?CB@f$nTL #an 'e $sed o se SIM908 ino minim$m f$n#ionali(. ;!en SIM908 is in slee& mode and
minim$m f$n#ionali(% !e #$rren of mod$le is lowes.
.#'#" Minimum unctionality Moe
)!ere are !ree f$n#ionali( modes% w!i#! #o$ld 'e se '( !e ) #ommand K)?CB@f$nTL. )!e #ommand
&ro"ides !e #!oi#e of !e f$n#ionali( le"els f$nT@0%1%5.
0J minim$m f$n#ionali(.
1J f$ll f$n#ionali( >defa$lA.
5J flig! mode >disa'le R f$n#ionA.
Minim$m f$n#ionali( mode minimies !e #$rren #ons$m&ion o !e lowes le"el. If SIM908 is se o
minim$m f$n#ionali( '( K)?CB@0L% !e R f$n#ion and SIM #ard f$n#ion will 'e disa'led. In !is #ase%
!e serial &or is sill a##essi'le% '$ all ) #ommands #orrelai"e wi! R f$n#ion and SIM #ard f$n#ion will
no 'e a##essi'le.
or deailed informaion a'o$ !e ) Command K)?CB@f$nTL% &lease refer o document [1].
Ta3le & 6 The Current consumption o, Minimum unctionality Moe
E,unF Current consumptionu/: sleep moe:
0 671
1 1700
5 17
.#'#$ Sleep Moe " /TCSC<B":
Bser #an #onrol SIM908 mod$le o ener or ei !e slee& mode 1 >)?CSC3@1A '( D)R signal. ;!en D)R
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is in !ig! le"el and wi!o$ inerr$& >on air and !ardware s$#! as EI inerr$& or daa in serial &orA% SIM908
will ener slee& mode 1 a$omai#all(. In !is mode% SIM908 #an sill re#ei"e &aging or SMS from newor+ '$
!e serial &or is no a##essi'le.
ote! 4or SIM03 it re=uests to set $% #ommand &$%'CSCL>)1+ and ensure D%R at high leel to ena-le the sleep mode 1?
the de,ault alue is 0 hi#h #an not ma@e the module to enter sleep mode. 4or more details please re,er to do#ument 516.
.#'#' Aa+e @p SIM908 ,rom Sleep Moe " /TCSC<B":
;!en SIM908 is in slee& mode 1 >)?CSC3@1A% !e following me!ods #an wa+e $& !e mod$leJ
$ll down D)R &in.
)!e serial &or will 'e a#i"e afer D)R &in is &$lled o low le"el for a'o$ 70ms.
Re#ei"e a "oi#e or daa #all from newor+.
Re#ei"e a SMS from newor+.
.#'#. Sleep Moe $ /TCSC<B$:
In !is mode% SIM908 will #onin$o$sl( monior !e serial &or daa signal. ;!en !ere is no daa ransfer o"er 7
se#onds on !e RFD signal and !ere is no on air and !ardware inerr$&s >s$#! as EI inerr$&A% SIM908 will
ener slee& mode 2 a$omai#all(. In !is mode% SIM908 #an sill re#ei"e &aging or SMS from newor+ '$ !e
serial &or is no a##essi'le.
ote! 4or SIM03 It is re=uested to set $% #ommand &$%'CSCL>)2+ to ena-le the sleep mode 2? the de,ault alue is 0 hi#h
#an not ma@e the module to enter sleep mode. 4or more details please re,er to do#ument 516.
.#'#- Aa+e @p SIM908 ,rom Sleep Moe $ /TCSC<B$:
;!en SIM908 is in slee& mode 2 >)?CSC3@2A% !e following me!ods #an wa+e $& !e mod$leJ
Send daa o SIM908 "ia main serial &or. G
Re#ei"e a "oi#e or daa #all from newor+.
Re#ei"e a SMS from newor+.
ote! %he ,irst -yte o, the userAs data ill not -e re#ogniBed.
.#. Charging inter,ace
SIM908 !as inegraed a #!arging #ir#$i inside !e mod$le for i-Ion 'aeries #!arging #onrol% w!i#! ma+e i
"er( #on"enien for $ser,s a&&li#aions !a s$&&or 'aer( #!arging. #ommon #onne#ion is s!own in !e
following fig$reJ
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Mod$le9aer( 6a#+
R )<M6
)!ermisor
)<M6_9.)
V9.)
VCHE
7V
igure "& 6 SIM908 !ith 3attery charger an pac+ connection
aer( em&era$re meas$remen is a #$somiaion f$n#ion w!i#! is s$&&ored '( !e sofware in !e mod$le.
In a'o"e fig$re% !e R )<M is a )C !ermisor% and i is re#ommended o $se MBR) C17FH10404RC. Is
im&edan#e is 103o!m a 27 . Refer o !e a'o"e fig$re for !e referen#e #ir#$i.℃
.#.#" ;attery pac+ characteristics
SIM908 !as o&imied !e #!arging algori!m for !e i-Ion 'aer( !a mees !e #!ara#erisi#s lised 'elow.
)!e maim$m #!arging "olage of !e i-Ion 'aer( &a#+ is 5.2V and !e re#ommended #a&a#i( is
1100m!. )!e aer( &a#+s wi! more !an 1100 m! #a&a#i( will a+e more ime for #!arging.
)!e 'aer( &a#+ s!o$ld !a"e a &roe#ion #ir#$i o a"oid o"er#!arging% dee& dis#!arging and o"er-
#$rren% and !e #ir#$i s!o$ld 'e insensii"e o &$lsed #$rren.
)!e inernal resisan#e of !e 'aer( &a#+ in#l$ding &roe#ion #ir#$i s!o$ld 'e as low as &ossi'le. Is
re#ommended "al$e does no e#eed 170mO.
)!e 'aer( &a#+ m$s 'e &roe#ed from re"erse &ole #onne#ion.
n !e SIM908% !e '$ild-in #ir#$i of !e &ower managemen #!i&se moniors !e s$&&l( "olage #onsanl(.
n#e !e Bnder-"olage is dee#ed% !e SIM908 will 'e &owered down a$omai#all(.
.#.#$ 2ecommene 3attery pac+
ollowing is !e s&e#ifi#aion of re#ommended 'aer( &a#+J
Ta3le 4 6 Speci,ication o, recommene 3attery pac+
Items Description
aer( (&e i-ion
Man$fa#$rer Uiade <nerg( )e#!nolog(
ormal "olage 4.V
Ca&a#i( RM 1100m!
C!arge Volage 5.2000.070V
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Ma C!arge C$rren 1.0C
C!arge Me!od CC : CV >Consan C$rren : Consan VolageA
Ma Dis#!arge C$rren 1.0C >for #onin$o$s dis#!arging modeA
Dis#!arge C$-off Volage 4.0V: #ell
Inernal resisan#e IniialQ140mO
.#.#' Implemente charging techni?ue
SIM908 !as 'aer( #!arging f$n#ion. )!ere are !ree &ins relaed o !e 'aer( #!arging f$n#ionJ !ere are
VCHE% V) and )<M_):DC0 &ins. )!e VCHE in is dri"en '( an eernal "olage% s(sem #an $se !is
in o dee# a #!arger s$&&l( and &ro"ide mos #!arging #$rren !ro$g! SIM908 mod$le o 'aer( w!en
#!arging is in fas #!arge sae. V) &in gi"es #!arging #$rren o eernal 'aer( from SIM908 mod$le.
)<M_) in is for $ser o meas$re !e 'aer( em&era$re. e !is in o&en if 'aer( em&era$re
meas$remen is no $ser,s design #on#ern.
I is "er( sim&le o im&lemen #!arging f$n#ion% $ser /$s needs o #onne# !e #!arger o !e VCHE in and
#onne# !e 'aer( o !e V) in.
SIM908 'aer( #!arging !a&&ens afer dee#ing #!arger s$&&l( and !e &resen#e of 'aer(. If !ere is no
#!arger s$&&l( or no 'aer( &resen% #!arging f$n#ion will no 'e ena'led.
ormall(% !ere are !ree main saes in !e w!ole #!arging &ro#ed$re.
DD #!arge >$ll-$& modeA and BV #!arge >re-#!arge modeAN
as #!argeN
DD<( charge an @V<( charge6
DD is !e sae of 'aer( w!en is "olage is $nder 1.7V. nd BV means !e 'aer( "olage is less !an
4.4V and more !an 1.7V. )!e 'aer( is no s$ia'le for fas #!arging w!en is #ondiion is DD or BV.
)!e SIM908 &ro"ides a small #onsan #$rren o !e 'aer( w!en !e 'aer( is 'eween DD and BV. In
DD #!arging sae% SIM908 gi"es o$ 1m #$rren o !e 'aer(. nd in BV #!arging sae% SIM908
&ro"ides a'o$ less !an 200m #$rren o !e 'aer(.
DD #!arging erminaes w!en !e 'aer( "olage rea#!es 1.7V. BV #!arging erminaes w!en !e 'aer(
"olage is $& o 4.4V. o! DD and BV #!arge are #onrolled '( !e SIM908 !ardware onl(.
ast charge6If !ere is a #!arger s$&&l( and 'aer( &resen and !e 'aer( is no in DD and BV% SIM908 will ener
fas #!arge sae. as #!arge is #onrolled '( !e sofware o ma+e !e #$rren:"olage reg$laion. )!e #!arging
s#!eme for !e i-Ion 'aer( is #onsan #$rren >a'o$ 770mA firs% followed '( #onsan "olage #!arging
on#e 5.2V is rea#!ed. C!arging is so&&ed w!en !e #!arging #$rren a #onsan "olage !as de#reased down o
!e &re-se #$rren.
.#.#. (perating moes uring charging
)!e 'aer( #an 'e #!arged d$ring "ario$s o&eraing mode. )!a means !a #!arging #an 'e in &rogress w!ile
SIM908 is in ormal mode >S<<% ID<% )3% ERS ID< or ERS D) modeA. In !is #ase !e "olage
s$&&l( s!o$ld 'e s$ffi#ien. Here C!arging in ormal mode is named as C!arge mode.
If !e #!arger is #onne#ed o !e mod$le,s VCHE in and !e 'aer( is #onne#ed o !e V) in w!ile
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SIM908 is in ;<R D; mode% SIM908 will go ino !e C!arge-onl( mode.
)!e following a'le gi"es !e differen#e 'eween C!arge mode and C!arge-onl( mode:
Ta3le 8 6 Charge operating moes
Ho! to acti)ate moe eatures
C h a r g e M o e
Conne# #!arger o mod$le,s VCHE in
and #onne# 'aer( o V) in of
mod$le w!ile SIM908 is in ormal
o&eraing mode% in#l$dingJ
ID<% )3 modeN S<< mode e#N
ESM remains o&eraional and
regisers o ESM newor+ w!ile
#!arging is in &rogressN
)!e serial inerfa#es are a"aila'le in
ID<% )3 mode% !e ) #ommand
se #an 'e $sed f$ll( in !is #aseN
In S<< mode% !e serial inerfa#es are
no a"aila'le. n#e !e serial &or is
#onne#ed and !ere is daa in ransfer.
SIM908 will ei !e S<< mode.
C h a r g e % o n l y M o e Conne# #!arger o mod$le,s VCHE in
w!ile SIM908 is in ;<R D;
mode.
IMR))J Here C!arge-onl( mode is
#!arging w!en &ower is down% i means
!a no all sofware as+s are r$nning.
aer( #an 'e #!arged w!en ESM
engine is no regisered o ESM
newor+N
nl( a few ) #ommands is
a"aila'le% as lised 'elow.
ote! <$% #an not proide more than m$ #urrent hile SIM03 module is during the DDL: #harge state. In other ords it
is strongly re#ommended that <$% should not -e the main poer supply in the appli#ation su-system i, SIM03 DDL:
#harging state o##urs.
Ta3le 9 6 /T Comman usually use in Charge%only moe
/T comman unction
)?CC3 Se daa and ime of R)C
)?C;D ower down)?CC Indi#aed #!arge sae and "olage
)?CB Sar or #lose !e &roo#ol
Se ) #ommand /TC@N "L% mod$le
#an 'e ransferred from C!arge-onl( mode
o C!arging in normal mode. In C!arge-onl(
mode% !e defa$l "al$e is 0.
.#.#- Charger re?uirements
ollowing is !e re*$iremens of #!arger for SIM908.
- Sim&le ransformer &ower &l$g
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igure $$ 6 Connection o, 2=D an T=D only
.#&#" unction o, Serial *ort an De3ug *ort
Serial &orJ
$ll modem de"i#e.
Conains daa lines )FD and RFD% !ardware flow #onrol lines R)S and C)S% sa$s lines D)R% DCD and
RI.
Serial &or #an 'e $sed for CSD F% ERS ser"i#e and ) #omm$ni#aion. I #an also 'e $sed for
m$li&leing f$n#ion. or deails a'o$ m$li&leing f$n#ion% &lease refer o document [3].
Serial &or s$&&ors !e following 'a$d raesJ
1200% 2500% 5800% 9600% 19200% 48500% 7600 and 117200'&s
$o'a$ding onl( s$&&ors !e following 'a$d raesJ
1200% 2500% 5800% 9600% 19200% 48500 and 7600'&s
)!e defa$l seing is a$o'a$ding.
$o'a$ding allows SIM908 o a$omai#all( dee# !e 'a$d rae of !e !os de"i#e. a( more aenion o !e
following re*$iremensJ
Synchroniation 3et!een DT an DC6
;!en DC< &owers on wi! a$o'a$ding ena'led% $ser m$s firsl( send #!ara#er KL o s(n#!ronie !e
'a$d rae. I is re#ommended o send K)L $nil D)< re#ei"es !e K3L res&onse% w!i#! means D)< andDC< are #orre#l( s(n#!ronied. or more informaion &lease refer o !e ) #ommand K)?IRL.
2estrictions o, auto3auing operation6
)!e D)< serial &or m$s 'e se a 8 daa 'is% no &ari( and 1 so& 'i.
)!e BRC s$#! as WRD=W% W?CBJ 1W and W?CIJ R<D=L will no 'e re&ored.
ote! "ser #an use $% #ommand &$%'I(R)*+ to set a ,i*ed -aud rate and the setting ill -e saed to non/olatile ,lash memory
automati#ally. $,ter the #on,iguration is set as ,i*ed -aud rate the "RC su#h as ERDYE E'C4"! 1E and E'C(I! R9$DY+
ill -e reported hen SIM03 is poered on.
De'$g &orJ Bsed for de'$gging and $&grading firmware.
De'$g &or s$&&ors !e 'a$d rae of 117200'&s.
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.#&#$ So,t!are @pgrae an De3ug
Refer o !e following fig$re for de'$gging and $&grading sofware.
igure $' 6 Connection ,or so,t!are upgraing an e3ugging
)!e serial &or and !e de'$g &or s$&&or !e CMS le"el. If $ser #onne#s !e mod$le o !e #om&$er% !e
le"el s!ifer s!o$ld 'e added 'eween !e DC< and D)<.
or deails a'o$ sofware $&grading%&lease refer o document [4].
4.7 /uio Inter,aces
SIM908 &ro"ides wo analog in&$s% MIC1:1 and MIC2:2% w!i#! #o$ld 'e $sed for ele#re mi#ro&!one.
)!e mod$le also &ro"ides wo analog o$&$s% S31:1 and S32:2. )!e o$&$ #an dire#l( dri"e 42O
re#ei"er.
) #ommand K)?CMICL is $sed o ad/$s !e in&$ gain le"el of mi#ro&!one. ) #ommand K)?SID<)L is
$sed o se !e side-one le"el. In addiion% ) #ommand K)?CVL is $sed o ad/$s !e o$&$ gain le"el. or
more deails% &lease refer o document [1] and document [5].
In order o im&ro"e a$dio &erforman#e% !e following referen#e #ir#$is are re#ommended. )!e a$dio signals
!a"e o 'e la(o$ a##ording o differenial signal la(o$ r$les as s!own in following fig$res. If $ser needs o $se
an am&lifier #ir#$i for a$dio% aional Semi#ond$#or Com&an(,s M5890 is re#ommended.
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.#4#" Spea+er Inter,ace Con,iguration
igure $. 6 Spea+er re,erence circuit
igure $- 6 Spea+er !ith ampli,ier re,erence circuit
.#4#$ Microphone Inter,aces Con,iguration
igure $& 6 Microphone re,erence circuit
Mi#ro&!one in&$ also #o$ld 'e $sed o I<-I in&$. or deails% &lease refer o document [6].
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$&$ swing
Volage
>single endedA
1.1 V&&
$&$ swing
Volage
>differenialA
2.2 V&&
4.8 SIM Car Inter,ace
.#8#" SIM Car /pplication
)!e SIM inerfa#e #om&lies wi! !e ESM !ase 1 s&e#ifi#aion and !e new ESM !ase 2? s&e#ifi#aion for
S) 65 +'&s SIM #ard. o! 1.8V and 4.0V SIM #ard are s$&&ored. )!e SIM inerfa#e is &owered from an
inernal reg$laor in !e mod$le.
I is re#ommended o $se an <SD &roe#ion #om&onen s$#! as S) >www.s.#om A <SD6V1;7 or S<MI
>www.onsemi.#om A SM07C.)!e &$ll $& resisor >173OA on !e SIM_D) line is alread( added in !e
mod$le inernal. oe !a !e SIM &eri&!eral #ir#$i s!o$ld 'e #lose o !e SIM #ard so#+e. )!e referen#e
#ir#$i of !e 8-&in SIM #ard !older is ill$sraed in !e following fig$re.
igure $8 6 2e,erence circuit o, the 8%pin SIM car holer
)!e SIM_R<S<C< &in is $sed for dee#ion of !e SIM #ard !o &l$g in. Bser #an sele# !e 8-&in SIM #ard
!older o im&lemen SIM #ard dee#ion f$n#ion. ) #ommand K)?CSD)L is $sed o ena'le or disa'le SIM
#ard dee#ion f$n#ion. or deails of !is ) #ommand% &lease refer o document [1].
If !e SIM #ard dee#ion f$n#ion is no $sed% $ser #an +ee& !e SIM_R<S<C< &in o&en. )!e referen#e
#ir#$i of 6-&in SIM #ard !older is ill$sraed in !e following fig$re.
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igure $9 6 2e,erence circuit o, the &%pin SIM car holer
.#8#$ Design Consierations ,or SIM Car Holer
or 6-&in SIM #ard !older% SIMCom re#ommends o $se m&!enol C0 10M006 7122 .Bser #an "isi!&J::www.am&!enol.#om for more informaion a'o$ !e !older.
igure '0 6 /mphenol C404 "0M00& -"$$ SIM car holer
Ta3le "$ 6 *in escription /mphenol SIM car holer:
*in name Signal Description
C1 SIM-VDD SIM #ard &ower s$&&l(
C2 SIM-RS) SIM #ard rese
C4 SIM-C3 SIM #ard #lo#+
C7 ED Conne# o ED
C6 V o #onne#
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C SIM-D) SIM #ard daa I:
or 8 &ins SIM #ard !older% SIMCom re#ommends o $se Mole 91228.Bser #an "isi !&J::www.mole.#om for
more informaion a'o$ !e !older.
igure '" 6 Mole5 9"$$8 SIM car holer
Ta3le "' 6 *in escription Mole5 SIM car holer:
*in name Signal Description
C1 SIM-VDD SIM #ard &ower s$&&l(
C2 SIM-RS) SIM #ard rese
C4 SIM-C3 SIM #ard #lo#+
C5 ED Conne# o ED
C7 ED Conne# o ED
C6 V o #onne#
C SIM-D) SIM #ard daa I:
C8 SIM-R<S<C< Dee# SIM #ard &resen#e
4.9 <CD Display7S*I Inter,ace
SIM908 &ro"ides a serial CD dis&la( inerfa#e. I #o$ld also 'e $sed as SI inerfa#e in !e em'edded )
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a&&li#aion. or deails a'o$ em'edded ) a&&li#aion% &lease refer o document [7].
ote! %his ,un#tion is not supported in the standard ,irmare. I, user ants this ,un#tion the ,irmare must -e #ustomiBed.
(lease #onta#t SIMCom ,or more details.
4.10 Beypa Inter,ace
)!e +e(&ad inerfa#e #onsiss of 4 +e(&ad #ol$mn o$&$s and 4 +e(&ad row in&$s. )!e 'asi# #onfig$raion is 4
+e(&ad #ol$mns and 4 +e(&ad rows% oal 9 +e(s.
Ta3le ". 6 *in e,inition o, the +eypa inter,ace
)!e +e(&ad inerfa#e allows a dire# eernal mari #onne#ion. (&i#al re#ommended #ir#$i of !e +e(&ad is
s!own in !e following fig$re.
igure '$ 6 2e,erence circuit o, the +eypa inter,ace
ote! %his ,un#tion is not supported in the standard ,irmare. I, user ants this ,un#tion the ,irmare must -e #ustomiBed.
(lease #onta#t SIMCom ,or more details.
.#"" /DC
SIM908 &ro"ides an a$iliar( DC% w!i#! #an 'e $sed o meas$re !e "olage. Bser #an $se ) #ommand
K)?CDCL o read !e "olage "al$e. or deails of !is ) #ommand% &lease refer o document [1].
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*in name *in num3er De,ault ,unction Secon ,unction De,ault state
EI1: 3R0 41 EI1 3e(&ad mari $&$% $ll downEI2: 3R1 42 EI2 $&$% $ll down
EI4: 3R2 44 EI4 $&$% $ll down
EI5: 3C0 45 EI5 $&$% $ll down
EI7: 3C1 47 EI7 $&$% $ll down
EI6: 3C2 46 EI6 $&$% $ll down
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Ta3le "- 6 /DC speci,ication
*arameter Min Typ Ma5 @nit
Volage range 0 - 2.8 V
DC Resol$ion - 10 - 'is
Sam&ling rae - - 2003 H
4.12 2I ;eha)iors
Ta3le "& 6 2I ;eha)iors
State 2I response
Sand'( Hig!
Voi#e #all )!e &in is #!anged o low. ;!en an( of !e following e"ens o##$r% !e &in will 'e #!angedo !ig!J
( 1) <sa'lis! !e #all
( 2) Hang $& !e #all
Daa #all )!e &in is #!anged o low. ;!en an( of !e following e"ens o##$r% !e &in will 'e #!anged
o !ig!J
( 1) <sa'lis! !e #all
( 2) Hang $& !e #all
SMS )!e &in is #!anged o low% and +e& low for 120ms w!en a SMS is re#ei"ed. )!en i is
#!anged o !ig!.
BRC )!e &in is #!anged o low% and +e& low for 120ms w!en some BRCs are re&ored. )!en i is
#!anged o !ig!. or more deails% &lease refer o document [8].
)!e 'e!a"ior of !e RI &in is s!own in !e following fig$re w!en !e mod$le is $sed as a re#ei"er.
igure '' 6 2I 3eha)iour o, )oice calling as a recei)er
igure '. 6 2I 3eha)iour o, ata calling as a recei)er
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igure '- 6 2I 3eha)iour o, @2C or recei)e SMS
Howe"er% if !e mod$le is $sed as #aller% !e RI will remain !ig!. lease refer o !e following fig$re.
igure '& 6 2I 3eha)iour as a caller
4.13 Net!or+ Status Inication
)!e <)IEH) &in #an 'e $sed o dri"e a newor+ sa$s indi#aion <D. )!e sa$s of !is &in is lised in
following a'leJ
Ta3le "4 6 Status o, the NT<IGHT pin
Status SIM908 3eha)ior
ff SIM908 is no r$nning
65ms n: 800ms ff SIM908 no regisered !e newor+
65ms n: 4000ms ff SIM908 regisered o !e newor+
65ms n: 400ms ff ERS #omm$ni#aion is esa'lis!ed
referen#e #ir#$i is re#ommended in !e following fig$reJ
igure '4 6 2e,erence circuit o, NT<IGHT
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and #onne# o mod$le,s anenna &ad !ro$g! mi#rosri& line or o!er (&e R ra#e w!i#! im&enden#e m$s 'e
#onrolled in 70O. )o fa#iliae !e anenna $ning and #erifi#aion es% a R #onne#or and an anenna ma#!ing
#ir#$i s!o$ld 'e added. )!e following fig$re is !e re#ommended #ir#$i.
igure '8 6 /ntenna matching circuit
In !is fig$re% !e #om&onens R101%R102%C101 and C102 is $sed for anenna ma#!ing% !e #om&onens, "al$e
onl( #an 'e go afer !e anenna $ning. Bs$all(% ma#!ing #om&onens, "al$e is &ro"ided '( anenna "endor% !e
defa$l "al$e of R101 and R102 are 0O% and reser"e !e &la#e of C101 and C102 wi!o$ soldering.
)!e R es #onne#or in a'o"e fig$re is $sed for #ond$#ed R &erforman#e es% and s!o$ld 'e &la#ed as #lose
as &ossi'le o !e mod$le,s R_) &in. )!e ra#es in 'old (&e s!o$ld 'e reaed as 70O im&edan#e #onrolled
line in C la(o$. or deails a'o$ radio fre*$en#( ra#e la(o$% &lease refer o document [9].
- G*S /pplication Inter,ace
SIM908 &ro"ide a !ig!-&erforman#e 1 ES sol$ion for #ell$lar !andse a&&li#aions. )!e sol$ion offers 'es-
in-#lass a#*$isiion and ra#+ing sensii"i(% )ime-)o-irs-i >))A and a##$ra#(. )!e ES engine s$&&ors
'o! f$ll(-a$onomo$s o&eraions for $se in !and!eld #ons$mer na"igaion de"i#es and o!er sandalone
na"igaion s(sems.
)!e ES M< informaion is o$&$ '( D<BE &or. )!e defa$l 'a$d rae is 117200'&s.
)!e ES engine is #onrolled '( ESM engine% so w!en i is ne#essar( o r$n ES , !e ESM engine m$s 'e
&owered on and no in S<< mode.
ll !e ES f$n#ion is #onrolled '( ) #ommand "ia serial &or. )!e ES f$n#ion ) #ommands are lised in
!e following a'le.
Ta3le "9 6 *in e,inition o, the G*I( inter,ace
Comman Description
)?CES;R ES ;<R C)R
)?CESRS) ES MD< R<S<) >H):;RM:CDA
)?CESS))BS E<) CBRR<) ES S))BS
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)?CESB) ES M< D) B)B) C)R
)?CESI E<) CBRR<) ES C)I I
)?CESIR S<) ES M< B)B) BR) S
or deails of !ese ) #ommand% &lease refer o document [1].
5.1 G*S operating moes
ES !as wo o&eraing modes w!i#! #an 'e #onrolled '( ) #ommand.
#i"e modeJ ES is a#i"e as a ES re#ei"er. )!e ES engine will a$omai#all( a#*$ire and ra#+ ES
saellies.
ower down modeJ )!e ES engine will 'e se ino !is mode '( sending ) #ommand K)?CES;R@0L. In
!is mode !e inernal &ower s$&&l( for ES will 'e s!$down% and !e #$rren #ons$m&ion is "er( low. )!e las
&osiion% #$rren ime and e&!emeris daa will 'e sored in !e ESM !os memor(.
5.2 *o!er on7o!n Scenarios
-#$#" *o!er on G*S engine
Bser #an &ower on ES engine '( sending ) #ommand K)?CES;R@1L.
-#$#$ *o!er o!n G*S engine
Bser #an &ower down ES engine '( sending ) #ommand K)?CES;R@0L.
5.3 G*S%V/NT%(@T an G*S%V/NT%IN
ES-V)-B) is a 2.8V o$&$ for a#i"e eernal anenna% if !e a#i"e eernal anenna wor+s a 2.8V
"olage s$&&l( domain% $ser #an #onne# !e ES-V)-B) and ES-V)-I dire#l(. If !e anenna,s
&ower is no 2.8V% a &ro&er "olage s!o$ld 'e &ro"ided o !e &in ES-V)-I de&ending on !e a#i"e
anenna% and !e &in ES-V)-B) s!o$ld 'e +e& o&en. or &assi"e anennas% 'o! !e &in ES-V)-B)
and !e &in ES-V)-I s!o$ld 'e +e& o&en.
-#. /ntenna Inter,ace
-#.#" /ntenna Inter,ace
SIM908 &ro"ides a SM) &ad and a #onne#or ES R anenna inerfa#e. If $sers $se SM) &ad ES R inerfa#e
!e #$somer,s anenna s!o$ld 'e lo#aed in !e #$somer,s main 'oard and #onne#ed o mod$le,s anenna &ad
!ro$g! mi#rosri& line or o!er (&e R ra#e w!i#! im&enden#e m$s 'e #onrolled in 70O. )o fa#iliae !e
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anenna $ning and #erifi#aion es% a R #onne#or and an anenna ma#!ing #ir#$i s!o$ld 'e added. )!e
following fig$re is !e re#ommended #ir#$i.
igure '9 6 /ntenna matching circuit
In !is fig$re% !e #om&onens R101% C101 and C102 is $sed for anenna ma#!ing% !e #om&onens, "al$e onl(
#an 'e go afer !e anenna $ning. Bs$all(% ma#!ing #om&onens, "al$e is &ro"ided '( anenna "endor% !e
defa$l "al$e of R101 is 0O% and $sers need o reser"e !e &la#e of C101 and C102 wi!o$ soldering.
)!e ra#es in 'old (&e s!o$ld 'e reaed as 70O im&edan#e #onrolled line in C la(o$.
-#.#$ G*S /ntenna Choice Consieration
)o o'ain e#ellen ES re#e&ion &erforman#e% a good anenna will alwa(s 'e re*$ired. )!e anenna is !e mos
#rii#al iem for s$##essf$l ES re#e&ion in a wea+ signal en"ironmen. ro&er #!oi#e and &la#emen of !e
anenna will ens$re !a saellies a all ele"aions #an 'e seen% and !erefore% a##$rae fi meas$remens are
o'ained.
Mos #$somers #onra# wi! anenna design !o$ses o &ro&erl( meas$re !e radiaion &aern of !e final
mo$ned #onfig$raion in a &lasi# !o$sing wi! asso#iaed #om&onens near !e anenna. inear anennas are
'e#oming more &o&$lar% and !e gain is reasona'le% sin#e a smaller gro$nd &lane #an 'e $sed.
Bser #an #onsider following fa#ors asJ
C!oose a linear anenna wi! a reasona'l( $niform !emis&!eri#al gain &aern of T-5di.
Bse of an anenna wi! lower gain !en !is will gi"e less !an desira'le res$ls. lease noe !a a RHC
anenna wi! a gain of 4di% e*$aes o a linear &olaried anenna of 0di.
ro&er gro$nd &lane siing is a #rii#al #onsideraion for small ES anennas.
ro&er &la#emen of !e ES anenna s!o$ld alwa(s 'e !e IRS) #onsideraion in inegraing !e SIM18
ES Mod$le.
If !e #$somer,s design will allow for a #erami# RHC &a#! anenna wi! an a&&ro&riael( sied gro$nd &lane%
and !e &a#! is normall( oriened owards !e s+(% !en !a &ari#$lar sol$ion $s$all( wor+s !e 'es. oe !a
if !e &a#! anenna gro$nd &lane is less !an 6060mm% !en #om&romises o !e 'eam wid! and gain &aern
#o$ld res$l. Bs$all( !e gain 'e#omes "er( dire#ional% and looses se"eral d of &erforman#e. Sin#e res$ls #an
"ar(% meas$ring !e anenna radiaion &aern in !e final !o$sing in an a&&ro&riae ane#!oi# #!am'er is re*$ired.
Some #$somers do no !a"e !e sie a"aila'ili( o im&lemen a &a#! anenna a&&roa#!. In !a insan#e% $se of
a inear olaried >A anenna is !e ne 'es alernai"e. )!ere are new #erami# anennas on !e mar+e
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!a e!i'i reasona'le gain #!ara#erisi#s on#e &ro&erl( mo$ned in !e !o$sing% and w!en ma#!ed o an
a&&ro&riae sied gro$nd. Eenerall( !e gro$nd &lane re*$iremens are smaller for a anenna w!en #om&ared
o a &a#!% '$ on#e again% &ro&er esing in an ane#!oi# #!am'er is a mandaor( re*$iremen. )!ese #erami#
elemens will need o 'e lo#aed near !e end of !e gro$nd &lane% and will re*$ire se"eral millimeers of
#learan#e 'eween !e #loses #om&onen. I is im&oran o noe !a $se of a anenna will res$l in a
minim$m of 4d of gain loss w!en #om&ared o a RHC anenna a a defined ele"aion. )!is is d$e o !e rig!
!and gain r$le of anenna &ro&agaion.
Bse of I anenna is ano!er &ossi'ili(% '$ !e I $s$all( e!i'is a #onsidera'le amo$n of gain n$lls%
or K!olesL in !e radiaion &aern. )!is will 'e $ndesira'le for o'aining a low #ir#$lar error &ro'a'ili( >C<A%
sin#e !e anenna ma( no allow !e re#ei"er o #a&$re !e desired saellie a !e ideal orienaion d$e o !ese
noed gain n$lls. n#e again% #aref$l esing in an a&&ro&riae ane#!oi# #!am'er is re*$ired.
If !e #$somer,s design is for a$omoi"e a&&li#aions% !en an a#i"e anenna #an 'e $sed and lo#aed on o& of
!e #ar in order for g$aranee !e 'es signal *$ali(. ES anenna #!oi#e s!o$ld 'e 'ased on !e designing
&rod$# and o!er #ondiions.
or deailed nenna designing #onsideraion% &lease refer o relaed anenna "endor,s design re#ommendaion.
)!e anenna "endor will offer f$r!er e#!ni#al s$&&or and $ne !eir anenna #!ara#erisi# o a#!ie"e s$##essf$l
ES re#e&ion &erforman#e de&ending on !e #$somer,s design.
& lectrical1 2elia3ility an 2aio Characteristics
6.1 /3solute Ma5imum 2atings
)!e a'sol$e maim$m raings saed in following a'le are sress raings $nder non-o&eraing #ondiions.
Sresses 'e(ond an( of !ese limis will #a$se &ermanen damage o SIM908.
Ta3le $0 6 /3solute ma5imum ratings
Sym3ol *arameter Min Typ Ma5 @nit
V) ower s$&&l( "olage - - 7.7 V
VIG In&$ "olage -0.4 - 4.1 V
IIG In&$ #$rren - - 10 m
IG $&$ #$rren - - 10 m
G)!ese &arameers are for digial inerfa#e &ins% s$#! as +e(&ad% EI% I 2C% BR)% CD% ;Ms and D<BE.
6.2 2ecommene (perating Conitions
Ta3le $" 6 2ecommene operating conitions
Sym3ol *arameter Min Typ Ma5 @nit
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V) ower s$&&l( "olage 4.2 5.0 5.8 V
)<R &eraing em&era$re -50 ?27 ?87 ℃
)S)E Sorage em&era$re -57 ?90 ℃
6.3 Digital Inter,ace Characteristics
Ta3le $$ 6 Digital inter,ace characteristics
Sym3ol *arameter Min Typ Ma5 @nit
IIH Hig!-le"el in&$ #$rren -10 - 10 $
II ow-le"el in&$ #$rren -10 - 10 $
VIH Hig!-le"el in&$ "olage 2.5 - - V
VI ow-le"el in&$ "olage - - 0.5 V
VH Hig!-le"el o$&$ "olage 2. - - V
V ow-le"el o$&$ "olage - - 0.1 V
G )!ese &arameers are for digial inerfa#e &ins% s$#! as +e(&ad% EI% I2C% BR)% CD% ;Ms and D<BE.
6.4 SIM Car Inter,ace Characteristics
Ta3le $' 6 SIM car inter,ace characteristics
Sym3ol *arameter Min Typ Ma5 @nit
IIH Hig!-le"el in&$ #$rren -10 - 10 $
II ow-le"el in&$ #$rren -10 - 10 $
VIH Hig!-le"el in&$ "olage 1.5 - - V
2.5 - - V
VI ow-le"el in&$ "olage - - 0.5 V
2.5 V
VH Hig!-le"el o$&$ "olage 1. - - V
2. - - V
V ow-le"el o$&$ "olage - - 0.1 V
- - 0.1 V
6.5 VDD_=T Characteristics
Ta3le $. 6 VDD_=T characteristics
Sym3ol *arameter Min Typ Ma5 @nit
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V $&$ "olage 2.0 2.80 2.97 V
I $&$ #$rren - - 10 m
6.6 SIM_VDD Characteristics
Ta3le $- 6 SIM_VDD characteristics
Sym3ol *arameter Min Typ Ma5 @nit
V $&$ "olage 2.7 2.9 4.00 V
1.67 1.80 1.97
I $&$ #$rren - - 10 m
6.7 V2TC Characteristics
Ta3le $& 6 V2TC characteristics
Sym3ol *arameter Min Typ Ma5 @nit
VR)C-I VR)C in&$ "olage 2.00 4.00 4.17 V
IR)C-I VR)C in&$ #$rren - 2 - $
VR)C-B) VR)C o$&$ "olage - 4.00 - V
IR)C-B) VR)C o$&$ #$rren - 10 - $
6.8 Current Consumption V;/T '#8V1 G*S engine is po!ere o!n:
Ta3le $4 6 GSM Current consumption
Sym3ol *arameter Conitions Value @nit
IVR)C VR)C #$rren V) dis#onne#s. a#+$& 'aer( is 4 V 2 $
IV) V) #$rren ower down mode 70 $
Slee& mode S--MRMS@9 1.2 m
S--MRMS@7 1.7
S--MRMS@2 1.
Idle mode ESM 870 21 m
<ESM 900
DCS 1800
CS 1900
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6.10 2aio Characteristics
&#"0#" Moule 2 (utput *o!er
)!e following a'le s!ows !e mod$le #ond$#ed o$&$ &ower% i is followed '( !e 4E )S 07.07 e#!ni#al
s&e#ifi#aion re*$iremen.
Ta3le $9 6 SIM908 GSM 900 an GSM 8-0 conucte 2 output po!er
GSM 900 an GSM 8-0
*C< Nominal output po!er ;m: Tolerance ;: ,or conitions
Normal 5treme
0-2 49 2 2.7
4 4 4 5
5 47 4 5
7 44 4 5
6 41 4 5
29 4 5
8 2 4 5
9 27 4 5
10 24 4 5
11 21 4 512 19 4 5
14 1 4 5
15 17 4 5
17 14 4 5
16 11 7 6
1 9 7 6
18 7 6
19-41 7 7 6
Ta3le '0 6 SIM908 DCS "800 an *CS "900 conucte 2 output po!er
DCS "800 an *CS "900
*C< Nominal output po!er ;m: Tolerance ;: ,or conitions
Normal 5treme
29 46 2 2.7
40 45 4 5
41 42 4 5
0 40 4 5
1 28 4 5
2 26 4 5
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4 25 4 5
5 22 4 5
7 20 4 5
6 18 4 5
16 4 5
8 15 4 5
9 12 5 7
10 10 5 7
11 8 5 7
12 6 5 7
14 5 5 7
15 2 7 6
17-28 0 7 6
or !e mod$le,s o$&$ &ower% !e following is s!o$ld 'e noedJ
ESM900 and ESM870 'and% !e mod$le is a #lass 5 de"i#e% so !e mod$le,s o$&$ &ower s!o$ld no e#eed
44dm% and a !e maim$m &ower le"el% !e o$&$ &ower oleran#e s!o$ld no e#eed ?:-2d $nder normal
#ondiion and ?:-2.7d $nder ereme #ondiion.
DCS1800 and CS1900 'and% !e mod$le is a #lass 1 de"i#e% so !e mod$le,s o$&$ &ower s!o$ld no e#eed
40dm% and a !e maim$m &ower le"el% !e o$&$ &ower oleran#e s!o$ld no e#eed ?:-2d $nder normal
#ondiion and ?:-2.7d $nder ereme #ondiion.
&#"0#$ Moule 2 2ecei)e Sensiti)ity
)!e following a'le s!ows !e mod$le,s #ond$#ed re#ei"e sensii"i(% i is esed $nder sai# #ondiion.
Ta3le '" 6 SIM908 conucte 2 recei)e sensiti)ity
re?uency 2ecei)e
sensiti)ity
Typical
2ecei)e sensiti)ityMa5:
ESM870 -109dm -10dm
<ESM900 -109dm -10dm
DCS1800 -109dm -10dm
CS1900 -109dm -10dm
&#"0#' Moule (perating re?uencies
)!e following a'le s!ows !e mod$le,s o&eraing fre*$en#( rangeN i is followed '( !e 4E )S 07.07
e#!ni#al s&e#ifi#aion re*$iremen.
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Ta3le '$ 6 SIM908 operating ,re?uencies
re?uency 2ecei)e Transmit
ESM870 869 895MH 825 859 MH
<ESM900 927 960MH 880 917MH
DCS1800 1807 1880MH 110 187MH
CS1900 1940 1990MH 1870 1910MH
4 Manu,acturing
7.1 Top Vie! o, SIM908
igure .0 6 Top )ie! o, SIM908
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4#$ Typical Soler 2e,lo! *ro,ile
igure ." 6 Typical Soler 2e,lo! *ro,ile
or deails a'o$ se#ondar( SM)% &lease refer o document [10].
4#' Moisture Sensiti)ity <e)el MS<:
SIM908 is *$alified o MS4 in a##ordan#e wi! IC:U<D<C U-S)D-044.
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lang$age-s&e#ifi# informaion
Y18Z ESM 11.10 Digial #ell$lar ele#omm$ni#aions s(sem >!ase 2A; Mo'ile Saion
>MSA #onforman#e s&e#ifi#aion ; ar 1J Conforman#e s&e#ifi#aion
;# Terms an /33re)iations
Ta3le '. 6 Terms an /33re)iations
/33re)iation Description
DC nalog-o-Digial Con"erer
MR da&i"e M$li-Rae
CS Coding S#!eme
CSD Cir#$i Swi#!ed Daa
C)S Clear o Send
D)< Daa )erminal <*$i&men >(&i#all( #om&$er% erminal% &rinerA
D)R Daa )erminal Read(
D)F Dis#onin$o$s )ransmission
<R <n!an#ed $ll Rae
<ESM <n!an#ed ESM
<SD <le#rosai# Dis#!arge
<)S <$ro&ean )ele#omm$ni#aion Sandard
R $ll Rae
ERS Eeneral a#+e Radio Ser"i#eESM Elo'al Sandard for Mo'ile Comm$ni#aions
HR Half Rae
IM<I Inernaional Mo'ile <*$i&men Ideni(
i-ion i!i$m-Ion
M Mo'ile riginaed
MS Mo'ile Saion >ESM engineA% also referred o as )<
M) Mo'ile )erminaed
assword $!eni#aion roo#ol
CCH a#+e road#as Conrol C!annel
C rined Cir#$i oard
C ower Conrol e"el
CS ersonal Comm$ni#aion S(sem% also referred o as ESM 1900
DB roo#ol Daa Bni
oin-o-&oin &roo#ol
R Radio re*$en#(
RMS Roo Mean S*$are >"al$eA
R)C Real )ime Clo#+
RF Re#ei"e Dire#ion
SIM S$'s#ri'er Idenifi#aion Mod$le
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SMS S!or Message Ser"i#e
)< )erminal <*$i&men% also referred o as D)<
)F )ransmi Dire#ion
BR) Bni"ersal s(n#!rono$s Re#ei"er [ )ransmier
BRC Bnsoli#ied Res$l Code
BSSD Bnsr$#$red S$&&lemenar( Ser"i#e Daa
*hone3oo+ a33re)iations
D SIM fi dialing &!one'oo+
D SIM las dialing &!one'oo+ >lis of n$m'ers mos re#enl( dialedA
MC Mo'ile <*$i&men lis of $nanswered M) #alls >missed #allsA
SIM >or M<A own n$m'ers >MSISDsA lis
RC Mo'ile <*$i&men lis of re#ei"ed #alls
SM SIM &!one'oo+
C o #onne#
C# Sa,ety Caution
Ta3le '- 6 Sa,ety caution
Mar+s 2e?uirements
;!en in a !os&ial or o!er !eal! #are fa#ili(% o'ser"e !e resri#ions a'o$ !e $se of mo'iles.
Swi#! !e #ell$lar erminal or mo'ile off% medi#al e*$i&men ma( 'e sensii"e o no o&erae
normall( for R energ( inerferen#e.
Swi#! off !e #ell$lar erminal or mo'ile 'efore 'oarding an air#raf. Ma+e s$re i is swi#!ed off.
)!e o&eraion of wireless a&&lian#es in an air#raf is for'idden o &re"en inerferen#e wi!
#omm$ni#aion s(sems. orge o !in+ m$#! of !ese insr$#ions ma( lead o !e flig! safe( or
offend agains lo#al legal a#ion% or 'o!.
Do no o&erae !e #ell$lar erminal or mo'ile in !e &resen#e of flamma'le gases or f$mes. Swi#!
off !e #ell$lar erminal w!en (o$ are near &erol saions% f$el de&os% #!emi#al &lans or w!ere
'lasing o&eraions are in &rogress. &eraion of an( ele#ri#al e*$i&men in &oeniall( e&losi"e
amos&!eres #an #onsi$e a safe( !aard.
=o$r #ell$lar erminal or mo'ile re#ei"es and ransmis radio fre*$en#( energ( w!ile swi#!ed on.
R inerferen#e #an o##$r if i is $sed #lose o )V ses% radios% #om&$ers or o!er ele#ri#
e*$i&men.
Road safe( #omes firs] Do no $se a !and-!eld #ell$lar erminal or mo'ile w!en dri"ing a
"e!i#le% $nless i is se#$rel( mo$ned in a !older for !ands free o&eraion. efore ma+ing a #all
wi! a !and-!eld erminal or mo'ile% &ar+ !e "e!i#le.
ESM #ell$lar erminals or mo'iles o&erae o"er radio fre*$en#( signals and #ell$lar newor+s and
#anno 'e g$araneed o #onne# in all #ondiions% for eam&le no mo'ile fee or a in"alid SIM #ard.
;!ile (o$ are in !is #ondiion and need emergen !el&% &lease remem'er $sing emergen#( #alls.
In order o ma+e or re#ei"e #alls% !e #ell$lar erminal or mo'ile m$s 'e swi#!ed on and in a
ser"i#e area wi! ade*$ae #ell$lar signal sreng!.
Some newor+s do no allow for emergen#( #all if #erain newor+ ser"i#es or &!one fea$res are in
$se >e.g. lo#+ f$n#ions% fied dialing e#.A. =o$ ma( !a"e o dea#i"ae !ose fea$res 'efore (o$
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