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Windows 2000 USB+PS/2 Keyboard Encoder Operating voltage: 4.4V~5.


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HT82K629A
Windows 2000 USB+PS/2 Keyboard Encoder
Operating voltage: 4.4V~5.5V Operating frequency: fSYS=6M Design Windows 95/98/NT/2000/XP Phantom detection voltage reset function modes supported Auto detect interface speed function Supports code code Supports multimedia Supports ACPI Supports mini-keyboard with Built-in Watchdog Timer HALT function wake-up feature mode
reduce power consumption
40-pin package
General Description
HT82K629A function both interface environment. interface, supports PC/AT, PS/2 compatible machines provides 16-character first-in-first-out buffer which data stored. interface, support standard request well class request version 1.1.
Block Diagram
itte
Rev. 1.30
April 2004
HT82K629A
Assignment
Description
Name Description Keyboard matrix scanning output pins Keyboard matrix scanning input pins Mini-keyboard select, function enabled connected VSS. lock indicator Caps lock indicator Scroll lock indicator Positive power supply 3.3V regulator output USBD- line function controlled software control register. USBD- DATA line function controlled software control register. Negative power supply, ground Schmitt trigger input. Active low. OSCO, OSCI connected 6MHz 12MHz crystal/resonator internal system clock. 11~14 19~26, 31~34 C0~C19 3~6, 35~38 R0~R7 Fn_Sel CAPS SCROLL V33O USBD+/CLK USBD-/DATA RESET OSCO OSCI
Absolute Maximum Ratings
Supply Voltage .VSS-0.3V VSS+6.0V Input Voltage .VSS-0.3V VDD+0.3V Storage Temperature .-50°C 125°C Operating Temperature .0°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.
Rev. 1.30
April 2004
HT82K629A
D.C. Characteristics
Symbol fSYS VV330 VIL1 VIH1 VIL2 VIH2 IOL1 IOL2 IOL3 IOL4 IOH1 IOH2 Parameter Operating Voltage Operating Frequency Standby Current Operating Current 3.3V Regulator Output Test Conditions Conditions fSYS=6MHz load, system HALT load, fSYS=6MHz IV33O=-5mA VOL=0.4V VOL=0.4V VOL=0.4V VOL=3.4V VOH=3.4V VOH=3.4V Min. 5.9747 0.9VDD Typ. Max. 6.0258 0.4VDD Ta=25°C Unit
Internal Pull-high Resistance (C0~C19, R0~R7) Input Voltage Ports Input High Voltage Ports Input Voltage (RESET) Input High Voltage (RESET) Sink Current (Fn_sel) Sink Current (R0~R7) Sink Current (C0~C19, NUM, CAPS, SCROLL) Sink Current (C0~C19, NUM, CAPS, SCROLL) Source Current (Fn_sel) Source Current (C0~C19, R0~R7, NUM,CAPS, SCROLL)
A.C. Characteristics
Symbol fWDT Parameter Built-in 32kHz Watchdog Timer Test Conditions Conditions
Ta=25°C Min. Typ. Max. Unit
Rev. 1.30
April 2004
HT82K629A
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 Invalid Command invalid commands supported. HT82K629A receives these sends HT82K629A will acknowledge command, returns Resend command continues previous scanning state. Select Alternate Scan Codes This command instructs HT82K629A select sets scan codes. HT82K629A 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 option byte value causes HT82K629A acknowledge with sends byte telling host which scan code currently use. After establishing scan code set, HT82K629A returns scanning state before receiving Select Alternate Scan Codes command. Read This command requests identification information from HT82K629A. HT82K629A responds with ACK, discontinues scanning sends keyboard bytes ABh. After output second byte, HT82K629A resumes scanning. HT82K629A responds option byte with ACK, sets indicators HT82K629A 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 HT82K629A receives this command, issues response HT82K629A previously enabled, continues scanning.
commands sent HT82K629A time HT82K629A 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. HT82K629A activates deactivates these indicators when receives valid command-code sequence from system. command sequence begins with command byte (hex ED). HT82K629A 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.
Rev. 1.30
April 2004
HT82K629A
Typematic Rate/Delay host issues Typematic Rate/Delay command change typematic rate delay. HT82K629A responds command with ACK, stops scanning waits system issue rate/delay value byte. HT82K629A responds value byte with another ACK, sets rate delay value indicated, continues scanning previously enabled). Bits 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. 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 Resend host sends this command when detects error transmission from HT82K629A. sent only after data transmission before host allows next data output. When Resend received, HT82K629A sends previous output again (unless previous output Resent, which case HT82K629A sends last byte before Resend command). F7H, F8H, F9H, Keys Since HT82K629A support keyboard code format, will acknowledge command returns Resend command continues previous scanning state. FBH, FCH, Type Since HT82K629A support keyboard code format, will acknowledge command returns Resend command continues previous scanning state. Enable Upon receipt this command, HT82K629A will respond with ACK, clears output buffer, clears last typematic key, starts scanning. Default Disable Default Disable command resets conditions power default states. HT82K629A will respond with ACK, clears output buffer, sets default typematic rate/delay, clears last typematic key. HT82K629A then stops scanning awaits further command. Default Default command resets conditions power default states. HT82K629A will respond with ACK, clears output buffer, sets default typematic rate/delay, clears last typematic then continues scanning.
default values HT82K629A follows: Typematic rate= 10.9 characters second Delay 500ms±20% execution this command stops without changes existing rate another command received instead rate/delay value byte.
Rev. 1.30
April 2004
HT82K629A
Commands Host following table shows commands that HT82K629A send host their hexadecimal values. Command Detection Error/Overrun Keyboard Completion Code Failure Core Echo Acknowledge Resend Detection Error/Overrun Value (Code 83AB (Code
Data Communications
Data output
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 every 60ms. line contention occurs (system brings clock before tenth clock), clock=data=high. 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 line. line active forced inactive, counts more bits. 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.
Data input
Detection Error HT82K629A sends detection error character conditions keyboard make impossible identify switch closure. HT82K629A using scan code code FFH. sets code 00H. Overrun overrun character placed HT82K629A buffer replaces last code when buffer capacity been exceeded. code sent host when reaches buffer queue. HT82K629A using scan code code FFH. sets code 00H. 83AbH Keyboard keyboard consists bytes, 83AbH. HT82K629A responds Read with ACK, discontinues scanning sends bytes. byte sent first followed high byte. Following output Keyboard HT82K629A begins scanning. Echo HT82K629A sends this code response Echo command. Completion Code Following satisfactory completion BAT, HT82K629A sends AAH. other code indicates keyboard failure. Failure Code failure occurs, HT82K629A sends this code, discontinues scanning waits host response reset. Resend HT82K629A issues Resend command following receipt invalid input input with incorrect parity. host sends nothing HT82K629A, response required. Rev. 1.30
keyboard line found inactive level following 10th bit, frame error occurred, keyboard continues count until line becomes active. keyboard then makes line inactive sends Resend. Data Stream Mode 1,2,3 Note: Start (always Data Data Data Data Data Data Data Data Parity (odd par) Stop (always parity either data bits, plus parity bit, always have number 1ms.
April 2004
HT82K629A
Code Number Symbol 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/FD 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 3A/BA 1E/9E 1F/9F 20/A0 21/A1 22/A2 23/A3 24/A4 25/A5 26/A6 27/A7 28/A8 Keycode107 (*B) Enter_R PgUp PgDn Shift Ctrl Space Ctrl Lock Home Number Symbol 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 4E/CE 7E/FE 1C/E0 01/81 3B/BB 3C/BC 3D/BD 3E/BE 3F/BF 40/C0 41/C1 42/C2
Keycode14 (*J) Back Space
Keycode29 (*4) Caps Lock
Rev. 1.30
April 2004
HT82K629A
Number Symbol Number Symbol Insert Delete Home PgUp PgDn Keycode42 (*5BJ) Enter_L Shift Keycode45 (*5B) Make/Break Code 2B/AB 1C/9C 2A/AA 56/D6 2C/AC Base Case Shift+Num Number Symbol Scroll Lock Make/Break Code 43/C3 44/C4 57/D7 58/D8 46/C6
Left-Shift
Right-Shift
Lock
When both shift keys held down: number Number Symbol
Both Shift 52/E0
Base 35/E0
Left-Shift
Right-Shift
35/E0 35/E0 Both Shift 35/E0
When both shift keys held down: number
Number Symbol Print Screen
Base 37/E0 Base
Shift/Ctrl 37/E0
54/D4 Ctrl
Number Symbol Pause
This typematic, associated scan codes occur make code. Number Function (*BJ) (*J) (*J) (*J) 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 Make/Break/Typematic Make/Break/Typematic Make/Break/Typematic Make/Break/Typematic Make Make
Rev. 1.30
April 2004
HT82K629A
Number Function ACPI ACPI ACPI Windows Power Sleep Wake-up Windows Windows Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Keyboard Only Keyboard Only E-Mail Home Favorites Search Refresh Stop Forward Back Media Play/Pause Stop Prev Track Next Track Volume+ VolumeMute Computer Calculator Screen save Minimize Eject 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 21/E0 26/E0 1E/E0 17/E0 2D/E0 11/E0 Keyboard Only Keyboard Only Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break/Typematic Make/Break/Typematic Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break/Typematic Make/Break/Typematic Make/Break Code 5E/E0 5F/E0 63/E0 Make/Break/Typematic Default Make/Break Make/Break Make/Break
Rev. 1.30
April 2004
HT82K629A
Code Number Symbol 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 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 Keycode107 (*B) Enter_R PgUp PgDn Shift Ctrl Space Ctrl Lock Home Number Symbol 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 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
Keycode14 (*J) Back Space
Keycode29 (*4) Caps Lock
Rev. 1.30
April 2004
HT82K629A
Number Symbol Number Symbol Insert Delete Home PgUp PgDn Keycode42 (*5BJ) Enter_L Shift Keycode45 (*5B) Base Case Shift+Num Make/Break Code 5D/F0 5A/F0 12/F0 61/F0 1A/F0 Left-Shift Number Symbol Scroll Lock Right-Shift Make/Break Code 01/F0 09/F0 78/F0 07/F0 7E/F0 Lock
When both Shift keys held down: number Number Symbol
Both Shift 52/E0
Base
Left-Shift
Right-Shift
4A/E0 4A/E0 4A/E0 Both Shift 4A/E0
When both Shift keys held down: number Number Symbol Print Screen
Base 7C/E0 Base
Shift/Ctrl 7C/E0
84/F0 Ctrl
Number Symbol Pause
This typematic, associated scan codes occur make code. Number Function (*BJ) (*J) (*J) (*J) 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 Make/Break/Typematic Make/Break/Typematic Make/Break/Typematic Make/Break/Typematic Make Make
Rev. 1.30
April 2004
HT82K629A
Number Function ACPI ACPI ACPI Windows Power Sleep Wake-up Windows Windows Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Multimedia Keyboard Only Keyboard Only E-Mail Home Favorites Search Refresh Stop Forward Back Media Play/Pause Stop Prev Track Next Track Volume+ VolumeMute Computer Calculator Screen save Minimize Eject 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 4B/E0 1C/E0 43/E0 22/E0 1D/E0 Keyboard Only Keyboard Only Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break/Typematic Make/Break/Typematic Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break Make/Break/Typematic Make/Break/Typematic Make/Break code 37/E0 3F/E0 5E/E0 Make/Break/Typematic Default Make/Break Make/Break Make/Break
Rev. 1.30
April 2004
HT82K629A
Timing Diagrams
Data Output
itio llin itio ilia ilia
Keyboard Data Input
itio ilia
Rev. 1.30
April 2004
HT82K629A
Interface HT82K629A control pipe configuration, command status type communication flows between clients software (BIOS, etc.) HT82K629A keyboard encoder device. also interrupt pipes send page Standard keyboard code ACPI, multimedia correspondingly clients software. output, comes from control pipe. HT82K629A support standard request class request. shown following table: Item Command Get_Status Clear Feature Feature Address Description endpoints status such STALL, wake-up, power information clear device STALL, remote wake-up function. device STALL, remote wake-up function. device address HT82K629A device, configuraYes tion information HT82K629A string descriptor response STALL (option command) device descriptor data (option command) device, configuration value device, configuration value device, interface device, interface output frame number response STALL (default value) response STALL response STALL response STALL Support
USB1.1 Standard Request Get_Descriptor
Set_Descriptor Get_Configuration Set_Configuration Get_Interface Set_Interface SYNCH_Frame Get_Descriptor Set_Descriptor Get_Report HID1.1 Class Request Set_Report Get_Protocol Set_Protocol Get_Idle Set_Idle Keyboard Output Format Interface
Endpoint1 standard keyboard endpoint
HT82K629A HID, report information device descriptor data (option command) response STALL
keyboard, ACPI, multimedia data keyboard boot report protocol (default report endpoint protocol) boot report protocol endYes point keyboard idle rate keyboard idle rate (default 500ms)
Endpoint1 HT82K629A used send standard keyboard code configured interrupt pipe. contain bytes data. first byte modified byte send left right (Shift, ALT, CTRL WIN) status. bitmap format. second byte reserved byte. third eight bytes used send other page7 codes (except above modified key). code list shown standard keyboard code table. R_Win R_ALT R_Shift R_Ctrl L_Win L_ALT L_Shift L_Ctrl
pressed released Modified Byte Definition Rev. 1.30 April 2004
HT82K629A
Endpoint2 ACPI, multimedia endpoint
Endpoint2 HT82K629A used send ACPI multimedia configured interrupt pipe. ACPI, there bytes data, first byte report byte 01H, second ACPI status. Byte pressed released ACPI Byte Definition multimedia keys, there four bytes data, first byte report byte 02H, second fourth multimedia status. Byte Eject Stop Stop Record Prev. Track Forward Minimize Bit6 00000b Bit6
00000001b Wake-up Sleep Power
00000010b Next Track Back Computer Play/Pause Home Screen Save Mute Favorites Calculator VolumeWWW Search Explorer Volume+ E-Mail Media
Refresh Rewind
pressed released Multimedia Bytes Definition
output
Client Software Output byte data HT82K629A, control status, through Endpoint0. format shown following table: 00000b Standard Keyboard Code Table Number Symbol Page Code Number Symbol Page Code Scroll Lock Lock Lock
Keycode56 (*BJ) Shift Ctrl Ctrl Ctrl Insert Delete Left Arrow Home
Rev. 1.30
April 2004
HT82K629A
Number Symbol Keycode14 (*J) Back Space Page Code Number Symbol Keycode107 (*B) Enter_R Print Screen Scroll Lock Pause PgUp PgDn PgUp PgDn Lock Home Page Code
Keycode29 (*4) Caps Lock
Keycode42 (*5BJ) Enter_L Shift Keycode45 (*5B)
Rev. 1.30
April 2004
HT82K629A
Number Symbol Keyboard Only Keyboard Only Number Symbol (*J) (*J) (*J) ACPI ACPI ACPI Windows Windows Windows Japanese J131 Japanese J132 Japanese J133 Korea KC-L, Key_Hangul Korea KC-R, Key_Hanja Power Sleep Wake-up Page Code Number Symbol Keyboard Only Keyboard Only Page Code Page Code
Multimedia Number Symbol E-Mail Home Favorites Search Refresh Stop Forward Back Media Play/Pause Stop Prev Track Next Track Volume+ VolumeMute Computer Calculator
Page following keys need driver
Code 018A 0223 022A 0221 0227 0226 0225 0224 0183 00CD 00B7 00B6 00B5 00E9 00EA 00E2 0194 0192
Explorer (Internet Browser) Screen Save Record Rewind Minimize
0196 019E 00B2 00B4 0206
Rev. 1.30
April 2004
HT82K629A
Function Usage Status Location Enter F1/F11 F2/F12 F10/ ScrLock /PgUp ®/End Enter PgDn Enter(R) ScrLock Page Page Down Home Lock Home PgUp Lock Enter(R) Lock Enter(L) ScrLock Page Page Down Home Lock
Rev. 1.30
April 2004
HT82K629A
Matrix R0/PA0 C0/PB0 PAUSE 7(Home) |(\) SCROLL Screen Save KC-L Media Computer E-mail Calculator SHIFT-L 6(®) Home Page SHIFT-R ENTER-R 3(PgDn) 0(Ins) .(Del) Back Page Down Search Forward Home Stop Refresh Explorer F1/F11 WIN-L WIN-R [({) ;(:) BACK Vol60 |(\) \(|) ALT-L 1(End) SPACE ](}) LOCK ENTER-L Vol+ ALT-R /(?) Eject F2/F12 _(-) F10/ Scroll KC-R Bkmk .(>) ,(<) CAPS \(-) Mute PRINT SCREEN POWER =(+) |(\) R1/PA1 Track R2/PA2 Stop R3/PA3 Play/Pause R4/PA4 CTRL-R N-CHG ROMA 6(^) 8(*) 5(%) 7(&) 4($) 3(#) R5/PA5 Next Track R6/PA6 CTRL-L 2(@) 1(!) R7/PA7
C1/PB1
C2/PB2
C3/PB3
C4/PB4
C5/PB5
C6/PB6
C7/PB7
C8/PD0
C9/PD1
C10/PD2
C11/PD3 C12/PD4 C13/PD5 C14/PD6 C15/PD7
C16/PC4 Wake-up 9(PgUp)
C17/PC5
HOME PgUp
C18/PC6
PgDn SLEEP
C19/PC7
Rev. 1.30
April 2004
HT82K629A
following table shows which needs driver different
Media, computer, Calculator E-mail, Home, Back, Forward, Stop, Refresh,
Need Drive
DOS, Win95
Favorite, Search
Vol-, Vol+, Mute, Track, Stop, Play/Pause, Next Track Rec, Rew, Min, Eject, Screen Save, Explorer Power, Wake-up, Sleep Media, computer, Calculator E-mail, Home, Back, Forward, Stop, Refresh,
Favorite, Search
Vol-, Vol+, Mute, Track, Stop, Play/Pause, Next Track Rec, Rew, Min, Eject, Screen Save, Explorer
Rec, Rew, Min, Eject, Screen Save, Explorer
Rev. 1.30
April 2004
HT82K629A
Application Circuits
Note:
single side PCB, should routed first. Avoid routing line line with jumping wires. lines should wide possible, also recommended that lines placed empty area, order increase their area. Wherever possible plane should surround pins such OSCI, OSCO, VDD, V330, RESET other related circuits minimize noise effects. GND/VDD loop area should minimized. keep lines parallel. external resistor 0.01mF capacitor connected should placed close possible pin. Allow room layout 0.1mF capacitor that connected pin. This capacitor should connected close possible pin. function this capacitor filter high frequency noise. lines connecting OSCI OSCO pins crystal must kept short possible minimize cross coupling noise from these pins. 0.1mF capacitor connected RESET should placed close possible RESET pin. function this capacitor filter high frequency noise minimize possibility glitch this line causing false reset. 0.1mF capacitor connected V33O should placed close possible V33O pin. USBD+ USBD- lines connector should kept short possible should placed close other lines reduce possibility noise coupling into other lines. externally connected 1.5kW resistor connected USBD- should placed close possible USBD- pin. cable should preferably have proper shielding.
Rev. 1.30
April 2004
HT82K629A
Package Information
40-pin (600mil) outline dimensions
Symbol
Dimensions Min. 2045 Nom. Max. 2065
Rev. 1.30
April 2004
HT82K629A
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) Floor, Building No.889, Shan Rd., Shanghai, China 200233 Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 43F, Plaza, Shen Zhong Road, Shenzhen, China 518031 Tel: 0755-8346-5589 Fax: 0755-8346-5590 ISDN: 0755-8346-5591 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125 Holmate Semiconductor, Inc. (North America Sales Office) 46712 Fremont Blvd., Fremont, 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright 2004 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. products authorized critical components life support devices systems. Holtek reserves right alter products without prior notification. most up-to-date information, please visit site http://www.holtek.com.tw.
Rev. 1.30
April 2004

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