Keyboard and its types

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Keyboard and its types

  1. 1. Introduction
  2. 2. TYPES OF KEYBOARD
  3. 3. 1. Compact Size POS Keyboard 2. Full Size POS Keyboard 3. 78-Key POS Keyboard 4. LCD-POS Keyboard 5. Qwerty-POS keyboard 6. Mini Qwerty POS Keyboard 7. 28-Key POS Keyboard 8. Compact POS Keyboard 9. 112, 66, 51, Key POS Keyboard Here, are some types:
  4. 4. Compact Size POS Keyboard
  5. 5. -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:
  6. 6. Full size POS keyboard
  7. 7. 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.
  8. 8. 78 Key POS Programmable Keyboard
  9. 9. 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
  10. 10. LCD POS Keyboard
  11. 11. 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
  12. 12. QWERTY POS Keyboard
  13. 13. 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
  14. 14. MINI QWERTY POS KEYBOARD
  15. 15. 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
  16. 16. 28-Key POS Keyboard
  17. 17. 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.
  18. 18. Compact POS Keyboard
  19. 19. 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
  20. 20. 112 Key POS keyboard
  21. 21. 66 Key POS keyboard
  22. 22. 51 Key POS Keyboard
  23. 23. FUNCTIONING OF KEYBOARD
  24. 24. 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
  25. 25. ANY QUESTIONS PLEASE ?
  26. 26. Thank you

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