HT82K628 Holtek Semiconductor Inc, HT82K628 Datasheet
HT82K628
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HT82K628 Summary of contents
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... RC oscillator · Phantom key detection · · Low power consumption General Description The HT82K628A is a keyboard encoder de- signed for IBM PC/AT, IBM PS/2 and all com- patible machines. The HT82K628A accepts keyboard inputs and provides a 16-character first-in-first-out buffer in which data is stored. HT82K628A · ...
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... Scroll Lock indicator O Num Lock indicator Bidirectional data transmission line Synchronous clock signal. Used to clock the transmis- sion data. Mini-keyboard select, enables the function if connected I to VSS. Macro Key select, disables the function if connected to I VSS. O Caps Lock indicator 2 HT82K628A July 20, 2000 ...
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... No load 2MHz 5V ¾ SYS 5V ¾ 3.5 ¾ 0. 4.5V -2 =3. ¾ ¾ ¾ 5V ¾ ¾ 3 HT82K628A Ta=25° ¾ 1 ¾ 12 ¾ mA -4.5 ¾ 4 ¾ MHz July 20, 2000 ...
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... Set Key Type - Make FD Resend FE Reset FF The commands may be sent to the HT82K628A at any time and the HT82K628A will respond within 25ms except when performing the inter- nal diagnostics or executing a Reset command. EDH - Set/Reset status indicators Three status indicators on the keyboard-Num Lock, Caps Lock, and Scroll Lock-are accessible by the host ...
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... The default values for the HT82K628A are as follows: Typematic rate= 10.9 characters per second ± 20% Delay = 500ms±20% The execution of this command stops without change to the existing rate if another command is received instead of the rate/delay value byte. F4H - Enable ...
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... FEH - Resend The host sends this command when it detects an error in any transmission from the HT82K628A sent only after a data trans- mission and before the host allows the next data output. When a Resend is received, the HT82K628A sends the previous output again ...
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... HT82K628A buffer and replaces the last code when the buffer capacity has been exceeded. The code is sent to the host when it reaches the top of the buffer queue. If the HT82K628A is us- ing scan code set 1, the code is FFH. For sets 2 and 3, the code is 00H. ...
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... B6 b7: b8: b9: b10: b11: Note: The parity bit is either and the 8 data bits, plus the parity bit, always have an odd number of 1ms. 8 HT82K628A start bit always 0 data bit 0 data bit 1 data bit 2 data bit 3 data bit 4 data bit 5 data bit 6 ...
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... Shift (R) 58 Ctrl (L) 60 Alt (L) 61 Space 62 Alt (R) 64 Ctrl (R) 90 Num Lock 91 7 Home 92 4 ¬ End 96 8 ¯ Ins 100 * 101 9 PgUp 102 6 ® 103 3 PgDn 104 . Del 105 - 9 HT82K628A 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 E0 38/ 1D/E0 9D 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 July 20, 2000 ...
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... Keyboard Only **102-Key Keyboard Only Preliminary Key Number Make/Break Code and Symbol 106 + 107 108 Enter 110 ESC 112 F1 113 F2 114 F3 115 F4 116 F5 117 F6 118 F7 119 F8 120 F9 121 F10 122 F11 123 F12 125 Scroll Lock 10 HT82K628A 4E/CE 7E/FE E0 1C/E0 9C 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 July 20, 2000 ...
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... / Both Shift / Shift/Ctrl E0 37 /E0 B7 Base HT82K628A Num Lock / / / / ...
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... Multimedia Key Function E-Mail WWW Home WWW Favorites WWW Search WWW Refresh WWW Stop WWW Forward WWW Back Media Play/Pause Stop Prev Track Next Track Volume+ Volume- Mute My Computer HT82K628A Default Make/Break Make/Break Make/Break Default 73/F3 Typematic 7B/FB Make 79/F9 Make 70/F0 Make F1/- Make F0/- Make ...
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... < > Shift (R) 58 Ctrl (L) 60 Alt (L) 61 Space 62 Alt (R) 64 Ctrl (R) 90 Num Lock 91 7 Home 92 4 ¬ End 96 8 13 HT82K628A 22/F0 22 21/F0 21 2A/F0 2A 32/F0 32 31/F0 31 3A/F0 3A 41/F0 41 49/F0 49 4A/F0 4A 59/F0 59 14/F0 14 11/F0 11 29/ 11/ 14/ 77/F0 77 6C/F0 6C 6B/F0 6B 69/F0 69 75/F0 75 July 20, 2000 ...
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... Enter 110 ESC 112 F1 113 F2 114 F3 115 F4 116 F5 117 F6 118 F7 119 F8 120 F9 121 F10 122 F11 123 F12 125 Scroll Lock 14 HT82K628A 73/F0 73 72/F0 72 70/F0 70 7C/F0 7C 7D/ 71/F0 71 7B/F0 7B 79/F0 79 6D/ 5A/ 76/F0 76 05/F0 05 06/F0 06 04/F0 04 0C/F0 0C 03/ 83/F0 83 0A/F0 0A 01/F0 01 09/F0 09 78/F0 78 07/F0 07 7E/F0 7E July 20, 2000 ...
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... Both Shift / Shift/Ctrl Base HT82K628A Num Lock / / / / ...
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... E-Mail WWW Home WWW Favorites WWW Search WWW Refresh WWW Stop WWW Forward WWW Back Media Play/Pause Stop Prev Track Next Track Volume+ Volume- Mute My Computer Calculator HT82K628A Default Make/Break Make/Break Make/Break Default 51/F0 51 Typematic 67/F0 67 Make 64/F0 64 Make 13/F0 13 Make Make F1/- F2/- Make Make/Break code ...
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... HT82K628A Default Key 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 ...
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... Make/Break code 51/F0 51 67/F0 67 64/F0 64 13/F0 13 F1/- F2/- 18 HT82K628A Default Key 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 ...
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... Timing Diagrams Data output Keyboard data input Preliminary HT82K628A July 20, 2000 ...
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... Should send <Ctrl>+<V> to system when pressed. Rotate Window ¨ Press this key to switch the activated task window. Should send <Alt>+<Tab> to system when pressed. Close Window ¨ Press this key to close the window. Should send <Alt>+<F4> to system when pressed. Preliminary 20 HT82K628A July 20, 2000 ...
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... End 1 ¯ 2 PgDn Ins 0 Del . / / Enter(R) Enter(R) F11 F1 F12 F2 ScrLock F10 Page Up Page Down ¯ Home ¬ End ® 21 HT82K628A Num Fn Lock >. ?/ Enter(L) F11 F12 ScrLock Page Up Page Down Home End July 20, 2000 ...
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... F11 ENTER-L F12 122 43 123 NUM SPACE ¯ LOCK 0(Ins) / ® .(Del 104 100 105 ¬ Ctrl(R)+ HT82K628A C6 C7 CTRL 116 ¢(~) 1(!) 2(@) 112 3 F2 3(#) 113 4 5(%) 4($) 6 5 6(^) 7(& =(+) 8(*) 9(¢(¢) ...
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... Page WWW Alt(R)+Tab Ctrl(R)+P F1/F11 Search Rec Rew Min Eject 00 000 Ctrl(R)+S F2/F12 WWW WWW WWW WWW Back Forward Stop Refresh ¯/ ¬/ ®/ Explorer Page Down Home END 23 HT82K628A F10/ Scroll KC-R 151 WWW Bkmk July 20, 2000 ...
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... Application Circuits Note: Fn Select ® GND: Enable the Mini Keyboard Macro Key Select ® GND: Disable the Macro Key Preliminary HT82K628A July 20, 2000 ...
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... Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. HT82K628A 25 July 20, 2000 ...