HT82K628A Design Windows 95/98/2000/NT Supports Windowskeys Suppo

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HT82K628A Design Windows 95/98/2000/NT Supports Windowskeys Suppo

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Windows 2000 Keyboard Encoder
HT82K628A
Design Windows 95/98/2000/NT Supports Windowskeys Supports PC/AT PS/2 code Supports Japanese Korean Brazilian European oscillator Phantom detection power consumption
101/102/104/109 keys other special application keyboard encoder external keys Supports Mini-keyboard Internet/Multimedia keyboard WINDOWS registered trademark Microsoft corporation 40-pin DIP/DICE form package
General Description
HT82K628A keyboard encoder designed PC/AT, PS/2 compatible machines. HT82K628A accepts keyboard inputs provides 16-character first-in-first-out buffer which data stored. inexpensive oscillator used system clock. Simple implementation this device advantage high performance cost keyboard applications.
July 2000
Assignment
HT82K628A
Description
10~7, 2~1, 40~39, 29~22 14~11 6~3, 38~35 Name R0~R19 C0~C7 SCROLL DATA CLOCK Select Macro Select CAPS Description
Keyboard matrix scanning output pins
Keyboard matrix scanning input pins
Negative power supply, ground
Scroll Lock indicator Lock indicator Bidirectional data transmission line Synchronous clock signal. Used clock transmission data. Mini-keyboard select, enables function connected VSS. Macro select, disables function connected VSS. Caps Lock indicator
July 2000
Name RESET OSC1 Description
HT82K628A
Chip reset input. Active low. Built-in power-on reset circuit reset entire chip. Chip also externally reset RESET pin. 5.0V positive power supply System clock input; 110kW resistor connected connection
Absolute Maximum Ratings
Supply Voltage .-0.3V 5.5V Input Voltage .VSS-0.3V VDD+0.3V Storage Temperature .-50°C 125°C Operating Temperature .-25°C 70°C
Note: These stress ratings only. Stresses exceeding range specified under Maximum cause substantial damage device. Functional operation this device other conditions beyond those listed specification implied prolonged exposure extreme conditions affect device reliability.
Electrical Characteristics
Symbol ILED Parameter Operating Voltage Operating Current OSC) Input Voltage Input High Voltage Sink Current Source Current Sink Current (Scroll, Num, Caps) Internal Pull-high Resistance (C0~C7, R0~R19) Internal Pull-high Resistance (DATA, CLOCK) Internal Pull-high Resistance (RESET) System Clock OSC) Test Conditions VOL= 0.5V VOH= 4.5V VOL=3.2V Conditions load, fSYS= 2MHz
Ta=25°C Min. Typ. Max. Unit -2.5 -4.5
Rph1 Rph2 fSYS
July 2000
Functional Description
Command from host following table shows commands that host send their hexadecimal values. Command Set/Reset Status Indicators Echo Invalid Command Select Alternate Scan Codes Invalid Command Read Typematic Rate/Delay Enable Default Disable Default Keys Typematic Keys Make/Break Keys Make Keys Typematic/ Make/Break Type Typematic Type Make/Break Type Make Resend Reset Value
HT82K628A
byte (hex ED). HT82K628A responds command byte with ACK, discontinues scanning, assignments this option byte follow: Indicator Scroll Lock Indicator Lock Indicator Caps Lock Indicator Reserved (Must
indicator indicator turned indicator turned off. HT82K628A responds option byte with ACK, sets indicators HT82K628A previously enabled, continues scanning. status indicators will reflect bits option byte activated deactivated combination. another command received place option byte, execution Set/Reset Mode Indicators command stopped, with change indicator status, command processed. Immediately after power-on, lights default state. Default Default Disable commands received, lamps remain state they were before command received. Echo Echo diagnostic aid. When HT82K628A receives this command, issues response HT82K628A previously enabled, continues scanning. Invalid command invalid commands supported. HT82K628A receives these sends HT82K628A will acknowledge command, returns Resend command continues previous scanning state.
commands sent HT82K628A time HT82K628A will respond within 25ms except when performing internal diagnostics executing Reset command. Set/Reset status indicators Three status indicators keyboard-Num Lock, Caps Lock, Scroll Lock-are accessible host. HT82K628A activates deactivates these indicators when receives valid command-code sequence from system. command sequence begins with command
July 2000
Select alternate scan codes This command instructs HT82K628A select three sets scan codes. HT82K628A acknowledges receipt this command with ACK, clears both output buffer typematic key. host then sends option byte keyboard responds with another ACK. option byte value selects scan code selects selects code set3. option byte value causes HT82K628A acknowledge with sends byte telling host which scan code currently use. After establishing scan code set, HT82K628A returns scanning state before receiving Select Alternate Scan Codes command. Read This command requests identification information from HT82K628A. HT82K628A responds with ACK, discontinues scanning sends keyboard bytes Abh. After output second byte, HT82K628A resumes scanning. typematic Rate/Delay host issues Typematic Rate/Delay command change typematic rate delay. HT82K628A responds command with ACK, stops scanning waits system issue rate/delay value byte. HT82K628A responds value byte with another ACK, sets rate delay value indicated, continues scanning previously enabled). Bit6 indicate delay, bits indicate rate. Bit7 always delay equal plus binary value multiplied 250ms±20%. period (interval from typematic output next) determined following equation: Period (8+A)*(2^B)*0.00417 seconds.
HT82K628A
Where: binary value bits binary value bits typematic rate each period listed follows: 00000 00001 00010 00011 00100 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 Typematic Rate 30.0 26.7 24.0 21.8 20.0 18.5 17.1 16.0 15.0 13.3 12.0 10.9 10.0 10000 10001 10010 10011 10100 10101 10110 10111 11000 11001 11010 11011 11100 11101 11110 11111 Typematic Rate
default values HT82K628A follows: Typematic rate= 10.9 characters second Delay 500ms±20% execution this command stops without change existing rate another command received instead rate/delay value byte. Enable Upon receipt this command, HT82K628A will respond with ACK, clears output buffer, clears last typematic key, starts scanning.
July 2000
Default disable Default Disable command resets conditions power default states. HT82K628A will respond with ACK, clears output buffer, sets default types (scan code operation only) typematic rate/delay, clears last typematic key. HT82K628A then stops scanning awaits further command. default Default command resets conditions power default states. HT82K628A will respond with ACK, clears output buffer, sets default types (scan code operation only) typematic rate/delay, clears last typematic then continues scanning. F7H, F8H, F9H, keys These commands instruct HT82K628A keys type listed below: Value Command Keys-Typematic Keys-Make/Break Keys-Make Keys-Typematic /Make/Break
HT82K628A
FBH, FCH, type These commands instruct HT82K628A individual keys type listed below: Value Command Type-Typematic Type-Make/Break Type-Make
HT82K628A will respond with ACK, clears output buffer prepares receive identification. identification accomplished host identifying each scan code value defined scan code Only scan code values valid identification. type each identified value indicated command. Although these commands sent using code set, they affect only scan code operation. Resend host sends this command when detects error transmission from HT82K628A. sent only after data transmission before host allows next data output. When Resend received, HT82K628A sends previous output again (unless previous output Resend, which case HT82K628A sends last byte before Resend command).
HT82K628A will respond with ACK, clears output buffer, sets keys type indicated this command, continues scanning previously enabled). Although these commands sent using code set, they affect only scan code operation.
July 2000
Commands host following table shows commands that HT82K628A send host, their hexadecimal values. Command Detection Error/Overrun Keyboard Completion Code Failure Core Echo Acknowledge Resend Detection Error/Overrun Value (Code 83AB (Code Echo
HT82K628A
HT82K628A sends this code response Echo command. completion code Following satisfactory completion BAT, HT82K628A sends AAH. other code indicates keyboard failure. failure code failure occurs, HT82K628A sends this code, discontinues scanning waits host response reset. Resend HT82K628A issues Resend command following receipt invalid input input with incorrect parity. host sends nothing HT82K628A, response required. Data communications
Data output
detection error HT82K628A sends detection error character conditions keyboard make impossible identify switch closure. HT82K628A using scan code code FFH. sets code 00H. Overrun overrun character placed HT82K628A buffer replaces last code when buffer capacity been exceeded. code sent host when reaches buffer queue. HT82K628A using scan code code FFH. sets code 00H. 83AbH Keyboard keyboard consists bytes, 83AbH. HT82K628A responds Read with ACK, discontinues scanning sends bytes. byte sent first followed high byte. Following output Keyboard HT82K628A begins scanning.
CLK=0, transmission (keyboard inhibited). CLK=1, DATA=0, transmission (system request send). CLK=1, DATA=1, transmission permitted. Data will valid before trailing edge beyond leading edge clock. checks clock line active level least every 60ms. line contention occurs (system brings clock before tenth clock), clock=data=high.
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Data input
HT82K628A
Data stream Mode 1,2,3 b10: b11: start always data data data data data data data data parity (odd par) stop always
system overrides clock line least 60ms. keyboard checks clock line state intervals 10ms system request-to-send detected, keyboard counts data bits. Data will valid before rising edge beyond falling edge After 10th bit, keyboard checks active level "data" line. line active forced inactive, counts more bit. Note: This action signals system that keyboard received data. Upon reception this signal, system returns ready state, which accept keyboard outputs goes inhibit state until ready.
Note: parity either data bits, plus parity bit, always have number 1ms.
keyboard "data" line found inactive level following 10th bit, frame error occurred, keyboard continues count until "data" line becomes active. keyboard then makes "data" line inactive sends Resend.
July 2000
code Number Symbol Back Space Make/Break Code 29/A9 02/82 03/83 04/84 05/85 06/86 07/87 08/88 09/89 0A/8A 0B/8B 0C/8C 0D/8D 7D/D6 0E/8E 0F/8F 10/90 11/91 12/92 13/93 14/94 15/95 16/96 17/97 18/98 19/99 1A/9A 1B/9B 2B/AB PgUp PgDn Number Symbol Ctrl Space Ctrl Lock Home
HT82K628A
Make/Break Code 2D/AD 2E/AE 2F/AF 30/B0 31/B1 32/B2 33/B3 34/B4 35/B5 36/B6 1D/9D 38/B8 39/B9 38/E0 1D/E0 45/C5 47/C7 4B/CB 4F/CF 48/C8 4C/CC 50/D0 52/D2 37/B7 49/C9 4D/CD 51/D1 53/D3 4A/CA
Shift
July 2000
Number Symbol **42 **45 Enter Shift Macro Caps Lock Make/Break Code 3A/BA 1E/9E 1F/9F 20/A0 21/A1 22/A2 23/A3 24/A4 25/A5 26/A6 27/A7 28/A8 2B/AB 1C/9C 2A/AA 56/D6 2C/AC Number Symbol Enter Scroll Lock
HT82K628A
Make/Break Code 4E/CE 7E/FE 1C/E0 01/81 3B/BB 3C/BC 3D/BD 3E/BE 3F/BF 40/C0 41/C1 42/C2 43/C3 44/C4 57/D7 58/D8 46/C6
*101-Key Keyboard Only **102-Key Keyboard Only
July 2000
Number Symbol Insert Base Case Shift+Num Left-Shift Right-Shift
HT82K628A
Lock
Home PgUp PgDn When both shift keys held down: Both Shift number 52/E0 Delete Number Symbol Base Left-Shift
Right-Shift
When both shift keys held down: number Number Symbol Print Screen
Both Shift Shift/Ctrl Ctrl
Base
Number Base Symbol Pause This typematic, associated scan codes occur make code.
July 2000
Number Function ACPI ACPI ACPI Power Sleep Wake-up Make/Break code 5E/E0 5F/E0 63/E0
HT82K628A
Default Make/Break Make/Break Make/Break
Number Function Brazil Japanese J131 Japanese J132 Japanese J133 Korea KC-L Korea KC-R
Make/Break code 73/F3 7B/FB 79/F9 70/F0 F1/F0/-
Default Typematic Make Make Make Make Make
Multimedia Function E-Mail Home Favorites Search Refresh Stop Forward Back Media Play/Pause Stop Prev Track Next Track Volume+ VolumeMute Computer
Make/Break code 6C/E0 32/E0 66/E0 E065/E0 67/E0 68/E0 69/E0 6A/E0 6D/E0 22/E0 24/E0 10/E0 19/E0 30/E0 2E/E0 20/E0 6B/E0
July 2000
Multimedia Function Calculator Screen save Minimize Eject Explorer code Number Symbol Back Space Make/Break Code 0E/F0 16/F0 1E/F0 26/F0 25/F0 2E/F0 36/F0 3D/F0 3E/F0 46/F0 45/F0 4E/F0 55/F0 6A/F0 66/F0 0D/F0 15/F0 1D/F0 24/F0 2D/F0 Number Symbol Ctrl Space Ctrl Lock Home
HT82K628A
Make/Break code 21/E0 26/E0 1E/E0 17/E0 2D/E0 11/E0 14/E0
Make/Break Code 22/F0 21/F0 2A/F0 32/F0 31/F0 3A/F0 41/F0 49/F0 4A/F0 59/F0 14/F0 11/F0 29/F0 11/E0 14/E0 77/F0 6C/F0 6B/F0 69/F0 75/F0
Shift
July 2000
Number Symbol **42 **45 Enter Shift Macro Make/Break Code 2C/F0 35/F0 3C/F0 43/F0 44/F0 4D/F0 54/F0 5B/F0 5D/F0 58/F0 1C/F0 1B/F0 23/F0 2B/F0 34/F0 33/F0 3B/F0 42/F0 4B/F0 4C/F0 52/F0 5D/F0 5A/F0 12/F0 61/F0 1A/F0 Enter Scroll Lock PgUp PgDn Number Symbol
HT82K628A
Make/Break Code 73/F0 72/F0 70/F0 7C/F0 7D/F0 71/F0 7B/F0 79/F0 6D/F0 5A/E0 76/F0 05/F0 06/F0 04/F0 0C/F0 03/F0 83/F0 0A/F0 01/F0 09/F0 78/F0 07/F0 7E/F0
Caps Lock
*101-Key Keyboard Only **102-Key Keyboard Only
July 2000
Number Symbol Insert Delete Home PgUp PgDn Base Case Shift+Num Left-Shift Right-Shift E059
HT82K628A
Lock
When both shift keys held Both Shift down: number 52/E0 Number Symbol Base Left-Shift Right-Shift
When both shift keys held down: number Number Symbol Print Screen
Both Shift Shift/Ctrl
Base
Number Base Ctrl Symbol Pause This typematic, associated scan codes occur make code.
July 2000
Number Function ACPI ACPI ACPI Power Sleep Wake-up Make/Break code 37/E0 3F/E0 5E/E0
HT82K628A
Default Make/Break Make/Break Make/Break
Number Function Brazil Japanese J131 Japanese J132 Japanese J133 Korea KC-L Korea KC-R
Make/Break code 51/F0 67/F0 64/F0 13/F0 F1/F2/-
Default Typematic Make Make Make Make Make
Multimedia Function E-Mail Home Favorites Search Refresh Stop Forward Back Media Play/Pause Stop Prev Track Next Track Volume+ VolumeMute Computer Calculator
Make/Break code 48/E0 3A/E0 18/E0 10/E0 20/E0 28/E0 30/E0 38/E0 50/E0 34/E0 3B/E0 15/E0 4D/E0 32/E0 21/E0 23/E0 40/E0 2B/E0
July 2000
Multimedia Function Screen save Minimize Eject Explorer code Number Make /Break Code 0E/F0 16/F0 1E/F0 26/F0 25/F0 2E/F0 36/F0 3D/F0 3E/F0 46/F0 45/F0 4E/F0 55/F0 5D/F0 66/F0 15/F0 1D/F0 24/F0 2D/F0 2C/F0 35/F0 3C/F0 43/F0 44/F0 4D/F0 54/F0 5B/F0 5C/F0 14/F0 1C/F0 1B/F0 Default State Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Typematic Typematic Number Make /Break Code 4A/F0 59/F0 11/F0 8B/F0 19/F0 29/F0 39/F0 8C/F0 58/F0 67/F0 64/F0 61/F0 6E/F0 65/F0 63/F0 60/F0 6F/F0 6D/F0 6A/F0 76/F0 6C/F0 6B/F0 69/F0 77/F0 75/F0 73/F0 72/F0 70/F0 7E/F0 7D/F0 74/F0 7A/F0 4B/E0 1C/E0 43/E0 22/E0 1D/E0 2C/E0
HT82K628A
Make/Break code
Default State Typematic Make/Break Make/Break Make/Break Make/Break Typematic Make Only Make/Break Make Only Make Only Typematic Typematic Make Only Make Only Typematic Typematic Make Only Make Only Typematic Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only
July 2000
Number **42 **45 Make /Break Code 23/F0 2B/F0 34/F0 33/F0 3B/F0 42/F0 4B/F0 4C/F0 52/F0 53/F0 5A/F0 12/F0 13/F0 1A/F0 22/F0 21/F0 2A/F0 32/F0 31/F0 3A/F0 41/F0 49/F0 Default State Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Number Make /Break Code 71/F0 84/F0 7C/F0 7B/F0 79/F0 08/F0 07/F0 0F/F0 17/F0 1F/F0 27/F0 2F/F0 37/F0 3F/F0 47/F0 4F/F0 56/F0 5E/F0 57/F0 5F/F0 62/F0 8D/F0
HT82K628A
Default State Make Only Make Only Typematic Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Typematic
*101-Key Keyboard Only **102-Key Keyboard Only
Number Function Brazil Japanese J131 Japanese J132 Japanese J133 Korea KC-L Korea KC-R
Make/Break code 51/F0 67/F0 64/F0 13/F0 F1/F2/-
Default Typematic Make Make Make Make Make
July 2000
Timing Diagrams
Data output
HT82K628A
itio llin itio ilia ilia
Keyboard data input
itio ilia
July 2000
Mini keyboard operation manual
Macro
HT82K628A
Open File Should send <Ctrl>+<O> system when pressed. SAVE Should send <Ctrl>+<S> system when pressed. PRINT Should send <Ctrl>+<P> system when pressed. Should send <Ctrl>+<X> system when pressed. COPY Should send <Ctrl>+<C> system when pressed. PASTE Should send <Ctrl>+<V> system when pressed. Rotate Window Press this switch activated task window. Should send <Alt>+<Tab> system when pressed. Close Window Press this close window. Should send <Alt>+<F4> system when pressed.
July 2000
usage
HT82K628A
Status Location Enter F1/F11 F2/F12 F10/ ScrLock /PgUp ®/End Enter PgDn Enter(R) ScrLock Page Page Down Home Lock Lock Home PgUp Enter(R) Lock Enter(L) ScrLock Page Page Down Home Lock
July 2000
matrix PAUSE [({) Vol$|) 9(PgUp) 6(®) 3(PgDn) ENTER-R 1(End) .(Del) Ctrl(R)+X ;(:) ALT-L SPACE 0(Ins) ](}) Ctrl(R)+O Vol+ ENTER-L LOCK .(>) |($ ALT-R CAPS LOCK ,(<) /(?) Track $-) Stop Play/Pause |($ CTRL-R Next Track N-CHG ROMA
HT82K628A
CTRL-L 5(%) 6(^) =(+) _(-) Mute PgUp HOME
1(!)
2(@)
3(#) 4($) 7(&) 8(*) PRINT SCREEN POWER
SCROLL LOCK Alt(R)+F4 |(\) 7(Home) BACK
SLEEP PgDn
July 2000
Wake-up Screen Save KC-L Media WIN-L Ctrl(R)+V E-mail SHIFT-L Ctrl(R)+C WIN-R Home SHIFT-R Search Back
HT82K628A
F10/ Scroll KC-R Bkmk
Alt(R)+Tab Ctrl(R)+P F1/F11 Forward Home Eject
Ctrl(R)+S F2/F12 Stop Refresh
Explorer
Calculator Computer Page Page Down
July 2000
Application Circuits
HT82K628A
Note: Select GND: Enable Mini Keyboard Macro Select GND: Disable Macro
July 2000
HT82K628A
Holtek Semiconductor Inc. (Headquarters) No.3 Creation Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) No.576, Sec.7 Chung Hsiao Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower Cheung Plaza, Cheung Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Copyright 2000 HOLTEK SEMICONDUCTOR INC. information appearing this Data Sheet believed accurate time publication. However, Holtek assumes responsibility arising from specifications described. applications mentioned herein used solely purpose illustration Holtek makes warranty representation that such applications will suitable without further modification, recommends products application that present risk human life malfunction otherwise. Holtek reserves right alter products without prior notification. most up-to-date information, please visit site http://www.holtek.com.tw.
July 2000

HT82K628A Design Windows 95/98/2000/NT Supports Windowskeys Suppo

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