keyboard and its types
DESCRIPTION
TRANSCRIPT
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Presentation on
Keyboard
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IntroductionIntroduction
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TYPES OF KEYBOARDKEYBOARD
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1. Compact Size POS Keyboard
2. Full Size POS Keyboard
3. 78-Key POS Keyboard4. LCD-POS Keyboard
5. Qwerty-POS keyboard 6. Mini Qwerty POS Keyboard7. 28-Key POS Keyboard8. Compact POS Keyboard
9. 112, 66, 51, Key POS Keyboard
Here, are some types:
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Compact Size POS Keyboard
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-64 fully programmable keys-Keyboards are backed up by 1.2mm thick metal frame-Available in USB, PS/2 Interface
-Programmable keys can be programmed with 255 characters
- Provides multi-level programming
-Provides for a variable time delay in each programmed string-Support PS/2 programming in DOS, Windows9X, Me, 2K, XP
-USB programming through the USB HID interface, need not any keyboard drivers.
FEATURES:
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Full size POS keyboard
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FEATURES:-32 fully programmable keys-QWERTY section is made of POS graded membrane keys -Numeric section is made of Cherry MX key switches -Keyboards are backed up by 1.2mm thick metal frame-With built-in touchpad, removable, detachable cables-Available in USB, PS/2 Interfac -Programmable keys can be programmed with 255 characters -Provides multi-level programming-Provides for a variable time delay in each programmed string-Provide a true Caps/Scroll/Numeric Lock function independent of any other keyboards being connected
-USB programming through the USB HID interface, need not any keyboard drivers.
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78 Key POS Programmable 78 Key POS Programmable KeyboardKeyboard
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FEATURES:-Two different key actions (soft contact and key click)-Laser-engraved keycap symbols or high quality UV silk screen printed keycap symbols-Operating life cycle of individual keys: >Soft contact mode: 50 million strokes >Key click mode: 20 million strokes
-Damaged keys can be easily replaced and hence save the replacement cost
-All keys can be programmed with unlimited characters-Does not require a TSR program and hence avoids application software crashes
-Provides multi-level programming-Provide a true Caps/Scroll/Numeric Lock function independent of any other keyboards being connected
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LCD POS Keyboard
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FEATURES:-LCD pos programmable keyboard features
-Display is present at top of board
-Rest is same as of previous POS keyboard
LCD Features:
-Dot Matrix LCD (132 * 32), with backlight LED-Support ESC/POS Protocol, control to display on both display or either one
-With built-in LCD Display, replacing the bulky monitor; low cost and space saving POS solution
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QWERTY POS Keyboard
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FEATURES:-Option for Unlimited Programmability of all Keys in up to 3 Layers Provides Convenient Data Access
-Plug and Play Configuration for all Common POS Features
-Enhanced US 131/127 Position Key Layout-Moving of Keys Allows for Easy Key Position Exchange Including Modifier Functions
-Pop-up Window for Comfortable Display of Programmed Keys-Robust Product Design with IP 54 Spill and Dust Resistant Key Field for Harsh Environments-Selection of Non-Keyboard Hexcodes Enhances Security for Credit Card Processing
-Full size keyboard with QWERTY layout-Fully Programmable Keyboard with 42 Relegendable Keys for Easy Layout Configuration and Quick Function Calls
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MINI QWERTY POS KEYBOARD
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FEATURES:-Compact keyboard with QWERTY section, with programmable keys
-High quality membrane keys with tactile feeling-Laser-engraved keycap symbols or high quality UV silk screen printed keycap symbols
-Damaged keys can be easily replaced and hence save the replacement cost-With internal strong metal plate to enhance the protection against ESD is increased
-All keys can be programmed with unlimited characters-Provides multi-level programming
-Support PS/2 programming in DOS, Windows9X, Me, 2K, XP
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28-Key POS Keyboard
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FEATURES:-With 28 Cherry MX key switches, good tactile feeling-With spill proof guide-array, patent design.- Laser-engraved keycap symbols or high quality UV silk screen printed keycap symbols
-Damaged keys can be easily replaced and hence save the replacement cost
-Detachable cable, using RJ-45 connector, USB Interface -All keys can be programmed with 255 characters-Provides multi-level programming -Provides for a variable time delay, of 0.5sec per interval-Support PS/2 programming in DOS, Windows9X, Me, 2K, XP-All programmed data are stored in the keyboard EEPROM.
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Compact POS Keyboard
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FEATURES:-64 fully programmable keys-QWERTY section can be on the top four rows or on the bottom four rows
-All keys are made of POS graded membrane keys-Keyboards are backed up by 1.2mm thick metal frame-Detachable cable, using the tough RJ45 connector-Available in USB, PS/2 Interface-Programmable keys can be programmed with 255 characters-Provides multi-level programming-Provides for a variable time delay in each programmed string
-Support PS/2 programming in DOS, Windows9X, Me, 2K, XP
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112 Key POS keyboard
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66 Key POS keyboard
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51 Key POS Keyboard
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FUNCTIONING OF KEYBOARD
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KEYBOARD CONTROLLER
KEYBOARD
BUFFER
SYSTEM SOFTWARE
1 A key is pressed on the keyboard
2 The keyboard controller sends the scan code for the key to key board buffer
3 The keyboard controller sends an interrupt request to the system software
4 The system software responds to the interrupt by reading the scan code from the keyboard buffer
5 The system software passes the scan code to CPU
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ANY QUESTIONS PLEASE ?
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Thank you