HOLTEK HT82K629A User Manual

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Windows 2000 USB+PS/2 Keyboard Encoder

Features

Operating voltage: 4.4V~5.5V

Operating frequency: f

Design for Windows 95/98/NT/2000/XP

Phantom key detection

Low voltage reset function

USB and PS2 modes supported

Auto detect USB or PS2 interface

USB 1.1 low speed function

General Description

The HT82K629A can function both in USB and PS2 in terface environment. For PS2 interface, it supports IBM PC/AT, IBM PS/2 and all compatible machines and pro vides a 16-character first-in-first-out buffer in which data

Block Diagram

SYS

=6M

HT82K629A

Supports PS2 code set 1 and code set 2

Supports multimedia key

Supports ACPI key

Supports mini-keyboard with Fn key

Built-in Watchdog Timer

HALT function and wake-up feature for USB mode to reduce power consumption

40-pin DIP package

is stored. For USB interface, it can support the USB

standard request as well as HID class request version

1.1.

U S B D + / P S 2 C L K

U S B D - / P S 2 D A T A

V 3 3 O

O S C 1

O S C 2

V D D

V S S

U S B

T r a n s c e i v e r

U S B

R e c e i v e r

U S B

T r a n s m i t t e r

V o l t a g e

R e g u l a t o r

C l o c k

G e n e r a t o r

R C R e s e t

R e g i s t e r S e t

U S B S e r i a l

I n t e r f a c e E n g i n e ( S I E )

& C o n t r o l L o g i c

M a i n

S t a t e M a c h i n e

S u s p e n d

C o n t r o l

H o l t e k 8 - b i t

M i c r o c o n t r o l l e r

F I F O s

Rev. 1.40 1 September 15, 2004

HT82K629A

Pin Assignment

C 1 7

C 1 6

R 3

R 2

R 1

R 0

N U M

C A P S

C 1 2

C 1 3

C 1 4

C 1 5

V D D

V 3 3 O

C 0

C 1

1 0

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 9

2 0

F n _ S e l

S C R O L L

U S B D + / C L K

U S B D - / D A T A

H T 8 2 K 6 2 9 A

4 0 D I P - A

Pin Description

Pin No. Pin Name I/O Description

1, 2, 11~14 19~26, 31~34 39, 40

3~6, 35~38 R0~R7 I Keyboard matrix scanning input pins

7 Fn_Sel I Mini-keyboard select, the function is enabled if connected to

8 NUM O Num lock indicator

9 CAPS O Caps lock indicator

10 SCROLL O Scroll lock indicator

15 VDD

16 V33O

17 USBD+/CLK I/O

18 USBD-/DATA I/O

27 VSS

28 RESET

29 30

C0~C19 O

OSCO OSCI

Keyboard matrix scanning output pins

Positive power supply

3.3V regulator output

USBD- or PS2 CLK I/O line USB or PS2 function is controlled by software control register.

USBD- or PS2 DATA I/O line USB or PS2 function is controlled by software control register.

Negative power supply, ground

I Schmitt trigger input. Active low.

OIOSCO, OSCI are connected to a 6MHz or 12MHz crystal/resonator for

the internal system clock.

C 1 8

4 0

C 1 9

3 9

R 4

3 8

R 5

3 7

R 6

3 6

R 7

3 5

C 1 1

3 4

C 1 0

3 3

C 9

3 2

C 8

3 1

O S C I

3 0

O S C O

2 9

R E S E T

2 8

V S S

2 7

C 7

2 6

C 6

2 5

C 5

2 4

C 4

2 3

C 3

2 2

C 2

2 1

VSS

Absolute Maximum Ratings

Supply Voltage ..........................VSS-0.3V to VSS+6.0V

Input Voltage .............................V

3V to VDD+0.3V

SS-0.

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil ity.

Rev. 1.40 2 September 15, 2004

Storage Temperature ...........................-50°Cto125°C

Operating Temperature ..............................0°Cto70°C

HT82K629A

D.C. Characteristics

Symbol Parameter

SYS

V330

IL1

IH1

IL2

IH2

OL1

OL2

OL3

OL4

OH1

OH2

Operating Voltage 5V

Operating Frequency 5V f

Standby Current 5V No load,systemHALT

Operating Current 5V

3.3V Regulator Output 5V

Internal Pull-high Resistance (C0~C19, R0~R7)

Input Low Voltage for I/O Ports 5V

Input HighVoltageforI/OPorts 5V

Input Low Voltage (RESET)5V

Input High Voltage (RESET)5V

Sink Current (Fn_sel) 5V

Sink Current (R0~R7) 5V

Sink Current (C0~C19, NUM, CAPS, SCROLL)

Source Current (Fn_sel) 5V

Source Current (C0~C19, R0~R7, NUM,CAPS, SCROLL)

Test Conditions

SYS

No load, f

V33O

Ta=25°C

Conditions

Min. Typ. Max. Unit

4.4

5.5 V

=6MHz 5.9747 6 6.0258 MHz

500

12 mA

0.8 V

0.4V

=-5mA

=0.4V

=3.4V

SYS

=6MHz

¾¾

3 3.3 3.6 V

25 50 75

0.9V

10 25

510

12 17

-8 -16 ¾

-2 -5 ¾

A.C. Characteristics

Symbol Parameter

WDT

Built-in 32kHz RC OSC for Watchdog Timer

Test Conditions

Conditions

Min. Typ. Max. Unit

¾¾¾32¾

Ta=25°C

kHz

Rev. 1.40 3 September 15, 2004

Functional Description

Command from the Host

The following table shows the commands that the host may send and their hexadecimal values.

Command Hex Value

Set/Reset Status Indicators ED

Echo EE

Invalid Command EF

Select Alternate Scan Codes F0

Invalid Command F1

Read ID F2

Set Typematic Rate/Delay F3

Enable F4

Default Disable F5

Set Default F6

Set All Keys - Typematic

Set All Keys - Make/Break

Set All Keys - Make

Set All Keys - Typematic/Make/Break

Set Key Type - Typematic

Set Key Type - Make/Break

Set Key Type - Make

Resend FE

Reset FF

The commands may be sent to the HT82K629A at any time and the HT82K629A will respond within 25ms except whenperforming the internal 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. The HT82K629A activates or deactivates these indica tors when it receives a valid command-code sequence from the system. The command sequence begins with the command byte (hex ED). The HT82K629A responds to the command byte with ACK, discontinues scanning, assignments for this option byte are as follow:

Bit Indicator

0 Scroll Lock Indicator

1 Num Lock Indicator

2 Caps Lock Indicator

3~7 Reserved (Must be 0)

If a bit for an indicator is set to 1, the indicator is turned on. If a bit is set to 0, the indicator is turned off.

HT82K629A

The HT82K629A responds to the option byte with ACK, sets theindicatorsandif the HT82K629Awas previously enabled, continues scanning. The status of the indica tors will reflect the bits in the option byte and can be acti vated or deactivated in any combination. If another command is received in place of the option byte, execu tion of the Set/Reset Mode Indicators command is stopped, with no change to the indicator status, and the new command is processed.

Immediately after power-on, the lights default to the off state. If the Set Default and Default Disable commands are received, the lamps remain in the state they were in before the command was received.

EEH - Echo

Echo is a diagnostic aid. When the HT82K629A re ceives this command, it issues a hex EE response and if the HT82K629A was previously enabled, continues scanning.

EFH and F1H - Invalid Command

EFH and F1H are invalid commands and are not sup ported. If HT82K629A receives one of these and sends it, the HT82K629A will not acknowledge the command, but returns a Resend command and continues in its previous scanning state.

F0H - Select Alternate Scan Codes

This commandinstructstheHT82K629Ato select one of the two sets of scan codes. The HT82K629A acknowledges receipt of this command with ACK, clears both the output buffer and the typematic key. The host then sends the option byte and the keyboard responds with another ACK. An option byte value of hex 01 selects scan code set 1, hex 02 selects set 2.

An option byte value of hex 00 causes the HT82K629A to acknowledge with ACK and sends a byte telling the host which scan code set is currently in use.

After establishing the new scan code set, the HT82K629A returns to the scanning state it was in be fore receiving the Select Alternate Scan Codes com mand.

F2H - Read ID

This command requests identification information from the HT82K629A. The HT82K629A responds with discontinues scanning and sends the two keyboard ID bytes hex 83h and ABh. After the output of the second ID byte, the HT82K629A resumes scanning.

ACK

Rev. 1.40 4 September 15, 2004

HT82K629A

F3H - Set Typematic Rate/Delay

The host issues the Set Typematic Rate/Delay com mand to change the typematic rate and delay. The HT82K629A responds to the command with ACK, stops scanning and waits for the system to issue the rate/de lay value byte. The HT82K629A responds to the value byte with another ACK, sets the rate and delay to the value indicated, and continues scanning (if it was previ ously enabled). Bits 6 and 5 indicate the delay, and bits 4, 3, 2, 1 and 0 indicate the rate. Bit7 is always 0. The delay is equal to 1 plus the binary value bit 6 and 5, mul tiplied by 250ms±20%.

The period (interval from one typematic output to the next) is determined by the following equation:

Period = (8+A)*(2^B)*0.00417 seconds.

Where:

A = binary value of bits 2, 1, and 0.

B = binary value of bits 4, and 3.

The typematic rate is 1 for each period and are listed as follows:

Bit

00000 30.0 10000 7.5

00001 26.7 10001 6.7

00010 24.0 10010 6.0

00011 21.8 10011 5.5

00100 20.0 10100 5.0

00101 18.5 10101 4.6

00110 17.1 10110 4.3

00111 16.0 10111 4.0

01000 15.0 11000 3.7

01001 13.3 11001 3.3

01010 12.0 11010 3.0

01011 10.9 11011 2.7

01100 10.0 11100 2.5

01101 9.2 11101 2.3

01110 8.0 11110 2.1

01111 8.0 11111 2.0

The default values for the HT82K629A are as follows:

Typematic rate= 10.9 characters per second ± 20%

Delay = 500ms±20%

The execution of this command stops without changes to the existing rate if another command is received in stead of the rate/delay value byte.

Typematic

Rate ± 20%

Bit

Typematic

Rate ± 20%

F4H - Enable

Upon receipt of this command, the HT82K629A will re

spond with ACK, clears its output buffer, clears the last

typematic key, and starts scanning.

F5H - Default Disable

The Default Disable command resets all conditions to the power on default states. The HT82K629A will

respond with fault typematic rate/delay, and clears the last typematic key. The HT82K629A then stops scanning and awaits

further command.

F6H - Set Default

The Set Default command resets all conditions to the power on default states. The HT82K629A will respond with ACK, clears its output buffer, sets the default key typematic rate/delay, and clears the last typematic key then continues scanning.

F7H, F8H, F9H, FAH - Set All Keys

Since HT82K629A do not support keyboard code set 3 format, so it will not acknowledge the command but re turns a Resend command and continues in its previous scanning state.

FBH, FCH, FDH - Set Key Type

Since HT82K629A do not support keyboard code set 3 format, so it will not acknowledge the command but returns a Resend command and continues in its previous scanning state.

FEH - Resend

The hostsendsthiscommand when it detects an error in any transmissionfrom the HT82K629A. It is sent only af ter a data transmission and before the host allows the next data output. When a Resend is received, the HT82K629A sends the previous output again (unless the previous output was Resent, in which case the HT82K629A sends the last byte before the Resend command).

, clears its output buffer, sets the de

ACK

Rev. 1.40 5 September 15, 2004

HT82K629A

Commands to the Host

The following table shows the commands that the HT82K629A may send to the host and their hexadeci

mal values.

Command Hex Value

Key Detection Error/Overrun 00 (Code Set 2)

Keyboard ID 83AB

Bat Completion Code AA

Bat Failure Core FC

Echo EE

Acknowledge FA

Resend FE

Key Detection Error/Overrun FF (Code Set 1)

00H or FFH - Key Detection Error

The HT82K629Asends a key detection error character if conditions in the keyboard make it impossible to identify a switch closure. If the HT82K629A is using scan code set 1, the code is FFH. For sets 2, the code is 00H.

00H or FFH - Overrun

An overrun character is placed in the HT82K629A 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 HT82K629Ais using scan code set 1, the code is

. For sets 2, the

FFH

code is 00H.

83AbH - Keyboard ID

The keyboard ID consists of 2 bytes, Hex 83AbH. The HT82K629A responds to the Read ID with ACK, discontinues scanning and sends 2 ID bytes. The low byte is sent first followed by the high byte. Following the output of Keyboard ID, the HT82K629A begins scanning.

EEH - Echo

The HT82K629A sends this code in response to an Echo command.

AAH - BAT Completion Code

Following a satisfactory completion of the BAT, the HT82K629A sends AAH. Any other code indicates key board failure.

FCH - BAT Failure Code

If a BAT failure occurs, the HT82K629A sends this code, discontinues scanning and waits for a host response or reset.

FEH - Resend

The HT82K629A issues a Resend command following receipt of an invalid input or any input with incorrect par ity. If the host sends nothing to the HT82K629A, no re sponse is required.

Data Communications

Data output

If CLK=0, no transmission (keyboard is inhibited).

If CLK=1, DATA=0, no transmission (system re quest to send).

If CLK=1, DATA=1, transmission permitted.

Data will be valid before the trailing edge and be yond the leading edge of the clock.

The KB checks the clock line for an active level ev ery 60ms.

If line contention occurs (system brings the clock low before the tenth clock), set clock=data=high.

Data input

The system overrides the clock line for at least 60ms.

The keyboard checks the clock line state at inter vals of 10ms.

If a system request-to-send is detected, the key board counts 11 data bits.

Data will be valid before the rising edge and beyond the falling edge.

After the 10th bit, the keyboard checks for an active level onthe ²data² line. If the line isactive it is forced to be inactive, and counts one more bits.

Note: This action signals the system that the

keyboard has received its data. Upon

reception of thissignal, the system returns

to the ready state, in which it can accept keyboard outputs or goes to the inhibit state until it is ready.

If the keyboard ²data² line is found to be at an inactive level followingthe 10th bit, a frame error has occurred, and the keyboard continues to count until the ²data² line becomes active. The keyboard then makes the ²data² line inactive and sends a Resend.

Data Stream

Mode 1,2,3

B1 B2 B3 B4 B5 B6

B7 B8 B9 B10 B11

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 Data bit 7 Parity bit (odd par) Stop bit (always 1)

Note: The parity bit is either 1or 0, and the 8 data bits,

plus the parity bit, always have an odd number of 1ms.

Rev. 1.40 6 September 15, 2004

HT82K629A

Key Code Set 1

Key Number

and Symbol

1 ~ ' 29/A9 47 X 2D/AD

2 ! 1 02/82 48 C 2E/AE

3 @ 2 03/83 49 V 2F/AF

4 # 3 04/84 50 B 30/B0

5 $ 4 05/85 51 N 31/B1

6 % 5 06/86 52 M 32/B2

7 ^ 6 07/87 53 < , 33/B3

8 & 7 08/88 54 > . 34/B4

9 * 8 09/89 55 ? / 35/B5

10 ( 9 0A/8A 57 Shift (R) 36/B6

11 ) 0 0B/8B 58 Ctrl (L) 1D/9D

12 _ - 0C/8C 60 Alt (L) 38/B8

13 + = 0D/8D 61 Space 39/B9

14 Keycode14 (*J) 7D/FD 62 Alt (R) E0 38/E0 B8

15 Back Space 0E/8E 64 Ctrl (R) E0 1D/E0 9D

16 Tab 0F/8F 90 Num Lock 45/C5

17 Q 10/90 91 7 Home 47/C7

18 W 11/91 92 4

19 E 12/92 93 1 End 4F/CF

20 R 13/93 96 8

21 T 14/94 97 5 4C/CC

22 Y 15/95 98 2

23 U 16/96 99 0 Ins 52/D2

24 I 17/97 100 * 37/B7

25 O 18/98 101 9 PgUp 49/C9

26 P 19/99 102 6

27 { [ 1A/9A 103 3 PgDn 51/D1

28 } ] 1B/9B 104 . Del 53/D3

29 Keycode29 (*4) 2B/AB 105 - 4A/CA

30 Caps Lock 3A/BA 106 + 4E/CE

31 A 1E/9E 107 Keycode107 (*B) 7E/FE

32 S 1F/9F 108 Enter_R E0 1C/E0 9C

33 D 20/A0 110 ESC 01/81

34 F 21/A1 112 F1 3B/BB

35 G 22/A2 113 F2 3C/BC

36 H 23/A3 114 F3 3D/BD

37 J 24/A4 115 F4 3E/BE

38 K 25/A5 116 F5 3F/BF

39 L 26/A6 117 F6 40/C0

40 : ; 27/A7 118 F7 41/C1

²¢

Make/Break Code

28/A8 119 F8 42/C2

Key Number

and Symbol

Make/Break Code



4D/CD

4B/CB

48/C8

50/D0

Rev. 1.40 7 September 15, 2004

HT82K629A

Key Number

and Symbol

42 Keycode42 (*5BJ) 2B/AB 120 F9 43/C3

43 Enter_L 1C/9C 121 F10 44/C4

44 Shift (L) 2A/AA 122 F11 57/D7

45 Keycode45 (*5B) 56/D6 123 F12 58/D8

46 Z 2C/AC 125 Scroll Lock 46/C6

Key Number

and Symbol

When both shift keys are held down: key number 75

Insert

Delete

Home

End



PgUp

PgDn

Make/Break Code

Base Case Shift+Num

E0 52

/E0 D2

E0 53

/E0 D3

E0 4B

/E0 CB

E0 47

/E0 C7

E0 4F

/E0 CF

E0 48

/E0 C8

E0 50

/E0 D0

E0 49

/E0 C9

E0 51

/E0 D1

E0 4D

/E0 CD

Left-Shift Right-Shift Num Lock

E0 AA E0 52

/E0 D2 E0 2A

E0 AA E0 53

/E0 D3 E0 2A

E0 AA E0 4B

/E0 CB E0 2A

E0 AA E0 47

/E0 C7 E0 2A

E0 AA E0 4F

/E0 CF E0 2A

E0 AA E0 48

/E0 C8 E0 2A

E0 AA E0 50

/E0 D0 E0 2A

E0 AA E0 49

/E0 C9 E0 2A

E0 AA E0 51

/E0 D1 E0 2A

E0 AA E0 4D

/E0 CD E0 2A

Both Shift E0 AA E0 B6 E0 52/E0 D2 E0 2A E0 36

Key Number

and Symbol

E0 B6 E0 52

/E0 D2 E0 36

E0 B6 E0 53

/E0 D3 E0 36

E0 B6 E0 4B

/E0 CB E0 36

E0 B6 E0 47

/E0 C7 E0 36

E0 B6 E0 4F

/E0 CF E0 36

E0 B6 E0 48

/E0 C8 E0 36

E0 B6 E0 50

/E0 D0 E0 36

E0 B6 E0 49

/E0 C9 E0 36

E0 B6 E0 51

/E0 D1 E0 36

E0 B6 E0 4D

/E0 CD E0 36

Make/Break Code

E0 2A E0 52

/E0 D2 E0 AA

E0 2A E0 53

/E0 D3 E0 AA

E0 2A E0 4B

/E0 CB E0 AA

E0 2A E0 47

/E0 C7 E0 AA

E0 2A E0 4F

E0 CF E0 AA

E0 2A E0 48

E0 C8 E0 AA

E0 2A E0 50

/E0 D0 E0 AA

E0 2A E0 49

/E0 C9 E0 AA

E0 2A E0 51

E0 D1 E0 AA

E0 2A E0 4D

E0 CD E0 AA

Key Number and Symbol

95 / E0 35/E0 B5 E0 AA E0 35/E0 B5 E0 2A E0 B6 E0 35/E0 B5 E0 36

When both shift keys are held down: key number 95

Key Number and Symbol

124 Print Screen E0 2A E0 37/E0 B7 E0 AA E0 37/E0 B7 54/D4

Key Number and Symbol

126 Pause E1 1D 45 E1 9D C5 E0 46 E0 C6

This key is not typematic, all associated scan codes occur on the make code.

Key Number

and Function

56 (*BJ) Brazil BA0 73/F3 Make/Break/Typematic

131 (*J) Japanese J131 7B/FB Make/Break/Typematic

132 (*J) Japanese J132 79/F9 Make/Break/Typematic

133 (*J) Japanese J133 70/F0 Make/Break/Typematic

150 Korea KC-L

151 Korea KC-R

Base Left-Shift Right-Shift

Both Shift E0 AA E0 B6 E0 35/E0 B5 E0 2A E0 36

Base Shift/Ctrl Alt

Base Ctrl

Make/Break Code Default

F1/-

F0/-

Make

Rev. 1.40 8 September 15, 2004

HT82K629A

Key Number

and Function

ACPI Power E0 5E/E0 DE Make/Break

ACPI Sleep E0 5F/E0 DF Make/Break

ACPI Wake-up E0 63/E0 E3 Make/Break

Windows Key L Win

Windows Key R Win

Windows Key APP

Multimedia Key E-Mail E0 6C/E0 EC Make/Break

Multimedia Key WWW Home E0 32/E0 B2 Make/Break

Multimedia Key WWW Favorites E0 66/E0 E6 Make/Break

Multimedia Key WWW Search E065/E0 E5 Make/Break

Multimedia Key WWW Refresh E0 67/E0 E7 Make/Break

Multimedia Key WWW Stop E0 68/E0 E8 Make/Break

Multimedia Key WWW Forward E0 69/E0 E9 Make/Break

Multimedia Key WWW Back E0 6A/E0 EA Make/Break

Multimedia Key Media E0 6D/E0 ED Make/Break

Multimedia Key Play/Pause E0 22/E0 A2 Make/Break

Multimedia Key Stop E0 24/E0 A4 Make/Break

Multimedia Key Prev Track E0 10/E0 90 Make/Break

Multimedia Key Next Track E0 19/E0 99 Make/Break

Multimedia Key Volume+ E0 30/E0 B0 Make/Break/Typematic

Multimedia Key

Multimedia Key Mute E0 20/E0 A0 Make/Break

Multimedia Key My Computer E0 6B/E0 EB Make/Break

Multimedia Key Calculator E0 21/E0 A1 Make/Break

Multimedia Key Screen save E0 26/E0 A6 Make/Break

Multimedia Key Rec E0 1E/E0 9E Make/Break

Multimedia Key Rew E0 17/E0 97 Make/Break

Multimedia Key Minimize E0 2D/E0 AD Make/Break

Multimedia Key Eject E0 11/E0 91 Make/Break

*4- 104 Keyboard Only *5- 105 Keyboard Only

Volume-

Make/Break Code Default

E0 5B

/E0 DB

E0 5C

/E0 DC

E0 5D

/E0 DD

E0 2E/E0 AE Make/Break/Typematic

*B - 107 Keyboard Only *J - 109 Keyboard Only

Make/Break/Typematic

Rev. 1.40 9 September 15, 2004

HT82K629A

Key Code Set 2

Key Number

and Symbol

1 ~ ' 0E/F0 0E 47 X 22/F0 22

2 ! 1 16/F0 16 48 C 21/F0 21

3 @ 2 1E/F0 1E 49 V 2A/F0 2A

4 # 3 26/F0 26 50 B 32/F0 32

5 $ 4 25/F0 25 51 N 31/F0 31

6 % 5 2E/F0 2E 52 M 3A/F0 3A

7 ^ 6 36/F0 36 53 < , 41/F0 41

8 & 7 3D/F0 3D 54 > . 49/F0 49

9 * 8 3E/F0 3E 55 ? / 4A/F0 4A

10 ( 9 46/F0 46 57 Shift (R) 59/F0 59

11 ) 0 45/F0 45 58 Ctrl (L) 14/F0 14

12 _ - 4E/F0 4E 60 Alt (L) 11/F0 11

13 + = 55/F0 55 61 Space 29/F0 29

14 Keycode14 (*J) 6A/F0 6A 62 Alt (R) E0 11/E0 F0 11

15 Back Space 66/F0 66 64 Ctrl (R) E0 14/E0 E0 F0 14

16 Tab 0D/F0 0D 90 Num Lock 77/F0 77

17 Q 15/F0 15 91 7 Home 6C/F0 6C

18 W 1D/F0 1D 92 4

19 E 24/F0 24 93 1 End 69/F0 69

20 R 2D/F0 2D 96 8

21 T 2C/F0 2C 97 5 73/F0 73

22 Y 35/F0 35 98 2

23 U 3C/F0 3C 99 0 Ins 70/F0 70

24 I 43/F0 43 100 * 7C/F0 7C

25 O 44/F0 44 101 9 PgUp 7D/F0 7D

26 P 4D/F0 4D 102 6

27 { [ 54/F0 54 103 3 PgDn 7A/ F0 7A

28 } ] 5B/F0 5B 104 . Del 71/F0 71

29 Keycode29 (*4) 5D/F0 5D 105

30 Caps Lock 58/F0 58 106 + 79/F0 79

31 A 1C/F0 1C 107 Keycode107 (*B) 6D/F0 6D

32 S 1B/F0 1B 108 Enter_R E0 5A/E0 F0 5A

33 D 23/F0 23 110 ESC 76/F0 76

34 F 2B/F0 2B 112 F1 05/F0 05

35 G 34/F0 34 113 F2 06/F0 06

36 H 33/F0 33 114 F3 04/F0 04

37 J 3B/F0 3B 115 F4 0C/F0 0C

38 K 42/F0 42 116 F5 03/F0 03

39 L 4B/F0 4B 117 F6 0B F0 0B

40 : ; 4C/F0 4C 118 F7 83/F0 83

²¢

Make/Break Code

52/F0 52 119 F8 0A/F0 0A

Key Number

and Symbol

Make/Break Code



6B/F0 6B

75/F0 75

72/F0 72

74/ F0 74

7B/F0 7B

Rev. 1.40 10 September 15, 2004

HT82K629A

Key Number

and Symbol

42 Keycode42 (*5BJ) 5D/F0 5D 120 F9 01/F0 01

43 Enter_L 5A/F0 5A 121 F10 09/F0 09

44 Shift (L) 12/F0 12 122 F11 78/F0 78

45 Keycode45 (*5B) 61/F0 61 123 F12 07/F0 07

46 Z 1A/F0 1A 125 Scroll Lock 7E/F0 7E

Key Number

and Symbol

When both Shift keys are held down: key number 75

Insert

Delete

Home

End



PgUp

PgDn

Make/Break Code

Base Case Shift+Num

E0 70

/E0 F0 70

E0 71

/E0 F0 71

E0 6B

/E0 F0 6B

E0 6C

/E0 F0 6C

E0 69

/E0 F0 69

E0 75

/E0 F0 75

E0 72

/E0 F0 72

E0 7D

/E0 F0 7D

E0 7A

/E0 F0 7A

E0 74

/E0 F0 74

Left-Shift Right-Shift Num Lock

E0 F0 12 E0 70 /E0 F0 70 E0 12 E0 F0 12 E0 71 /E0 F0 71 E0 12 E0 F0 12 E0 6B

/E0 F0 6B E0 12

E0 F0 12 E0 6C

/E0 F0 6C E0 12

E0 F0 12 E0 69 /E0 F0 69 E0 12 E0 F0 12 E0 75 /E0 F0 75 E0 12 E0 F0 12 E0 72 /E0 F0 72 E0 12 E0 F0 12 E0 7D

/E0 F0 7D E0 12

E0 F0 12 E0 7A

/E0 F0 7A E0 12

E0 F0 12 E0 74 /E0 F0 74 E0 12

Both Shift E0 AA E0 B6 E0 52/E0 D2 E0 2A E0 36

Key Number

and Symbol

E0 F0 59 E0 70

/E0 F0 70 E0 59

E0 F0 59 E0 71

/E0 F0 71 E0 59

E0 F0 59 E0 6B /E0 F0 6B E0 59 E0 F0 59 E0 6C /E0 F0 6C E0 59

E0 F0 59 E0 69 /E0 F0 69 E0 59

E0 F0 59 E0 75 /E0 F0 75 E0 59

E0 F0 59 E0 72 /E0 F0 72 E0 59 E0 F0 59 E0 7D /E0 F0 7D E0 59

E0 F0 59 E0 7A /E0 F0 7A E0 59

E0 F0 59 E0 74 /E0 F0 74 E0 59

Make/Break Code

E0 12 E0 70

/E0 F0 70 E0 F0 12

E0 12 E0 71

/E0 F0 71 E0 F0 12

E0 12 E0 6B

/E0 F0 6B E0 F0 12

E0 12 E0 6C

/E0 F0 6C E0 F0 12

E0 12 E0 69

/E0 F0 69 E0 F0 12

E0 12 E0 75

/E0 F0 75 E0 F0 12

E0 12 E0 72

/E0 F0 72 E0 F0 12

E0 12 E0 7D

/E0 F0 7D E0 F0 12

E0 12 E0 7A

/E0 F0 7A E0 F0 12

E0 12 E0 74

/E0 F0 74 E0 F0 12

Key Number

and Symbol

95 / E0 4A/E0 F0 4A E0 F0 12 E0 4A/E0 F0 4A E0 12 E0 F0 59 E0 4A/E0 F0 4A E0 59

When both Shift keys are held down: key number 95

Key Number

and Symbol

124 Print Screen E0 12 E0 7C/E0 F0 7C E0 F0 12 E0 7C/E0 F0 7C 84/F0 84

Key Number

and Symbol

126 Pause E1 14 77 E1 F0 14 F0 77 E0 7E E0 F0 7E

This key is not typematic, all associated scan codes occur on the make code.

Key Number

and Function

56 (*BJ) Brazil BA0 51/F0 51 Make/Break/Typematic

131 (*J) Japanese J131 67/F0 67 Make/Break/Typematic

132 (*J) Japanese J132 64/F0 64 Make/Break/Typematic

133 (*J) Japanese J133 13/F0 13 Make/Break/Typematic

150 Korea KC-L

151 Korea KC-R

Base Left-Shift Right-Shift

Both Shift E0 F0 12 E0 F0 59 E0 4A/E0 F0 4A E0 12 E0 59

Base Shift/Ctrl Alt

Base Ctrl

Make/Break code Default

F1/-

F2/-

Make

Rev. 1.40 11 September 15, 2004

HT82K629A

Key Number

and Function

ACPI Power E0 37/E0 F0 37 Make/Break

ACPI Sleep E0 3F/E0 F0 3F Make/Break

ACPI Wake-up E0 5E/E0 F0 5E Make/Break

Windows Key L Win

Windows Key R Win

Windows Key APP

Multimedia Key E-Mail E0 48/E0 F0 48 Make/Break

Multimedia Key WWW Home E0 3A/E0 F0 3A Make/Break

Multimedia Key WWW Favorites E0 18/E0 F0 18 Make/Break

Multimedia Key WWW Search E0 10/E0 F0 10 Make/Break

Multimedia Key WWW Refresh E0 20/E0 F0 20 Make/Break

Multimedia Key WWW Stop E0 28/E0 F0 28 Make/Break

Multimedia Key WWW Forward E0 30/E0 F0 30 Make/Break

Multimedia Key WWW Back E0 38/E0 F0 38 Make/Break

Multimedia Key Media E0 50/E0 F0 50 Make/Break

Multimedia Key Play/Pause E0 34/E0 F0 34 Make/Break

Multimedia Key Stop E0 3B/E0 F0 3B Make/Break

Multimedia Key Prev Track E0 15/E0 F0 15 Make/Break

Multimedia Key Next Track E0 4D/E0 F0 4D Make/Break

Multimedia Key Volume+ E0 32/E0 F0 32 Make/Break/Typematic

Multimedia Key

Multimedia Key Mute E0 23/E0 F0 23 Make/Break

Multimedia Key My Computer E0 40/E0 F0 40 Make/Break

Multimedia Key Calculator E0 2B/E0 F0 2B Make/Break

Multimedia Key Screen save E0 4B/E0 F0 4B Make/Break

Multimedia Key Rec E0 1C/E0 F0 1C Make/Break

Multimedia Key Rew E0 43/E0 F0 43 Make/Break

Multimedia Key Minimize E0 22/E0 F0 22 Make/Break

Multimedia Key Eject E0 1D/E0 F0 1D Make/Break

*4- 104 Keyboard Only *5- 105 Keyboard Only

Volume-

Make/Break code Default

E0 1F

/E0 F0 1F

E0 27

/E0 F0 27

E0 2F

/E0 F0 2F

E0 21/E0 F0 21 Make/Break/Typematic

*B - 107 Keyboard Only *J - 109 Keyboard Only

Make/Break/Typematic

Rev. 1.40 12 September 15, 2004

Timing Diagrams

Data Output

( 1 ) ( 3 ) ( 3 )

C L K

( 2 )

D A T A S t a r t B i t B i t 0 P a r i t y B i t S t o p B i t

1 s t

C L K

T 3 T 4

T 1 T 2

2 n d C L K

HT82K629A

( 3 )

( 3 ) ( 4 )

1 0 t h C L K

1 1 t h C L K

( 5 ) ( 7 )

T 5

( 6 )

Keyboard Data Input

( 1 )

C L K

D A T A S t a r t B i t B i t 0 P a r i t y B i t S t o p B i t

T i m i n g P a r a m e t e r

T 1

D A T A t r a n s i t i o n t o t h e f a l l i n g e d g e o f C L K

T 2

R i s i n g e d g e o f C L K t o D A T A t r a n s i t i o n

T 3

D u r a t i o n o f C L K i n a c t i v e

T 4

D u r a t i o n o f C L K a c t i v e

T 5

T i m e t o a u x i l i a r y d e v i c e i n h i b i t a f t e r c l o c k 1 1 t o e n s u r e t h a t t h e a u x i l i a r y d e v i c e d o e s n o t s t a r t a n o t h e r t r a n s m i s s i o n .

( 4 )

( 2 )

I / O

I n h i b i t

T i m i n g P a r a m e t e r

D u r a t i o n o f C L K i n a c t i v e

T 7

T 8

D u r a t i o n o f C L K a c t i v e

T 9 T i m e f r o m i n a c t i v e t o a c t i v e C L K t r a n s i t i o n , u s e d t o t i m e

w h e n t h e a u x i l i a r y d e v i c e s a m p l e s D A T A

1 s t C L K

T 7 T 8

( 3 )

2 n d

C L K

T 9

( 5 ) ( 7 )

C L K

9 t h

( 5 )

1 0 t h C L K

( 6 )

M i n / M a x

s e c

5 / 2 5

5 / T 4 - 5 ms e c 3 0 / 5 0

3 0 / 5 0

> 0 / 5 0

1 1 t h C L K

M i n / M a x

3 0 / 5 0 ms e c

s e c

5 / 2 5

s e c

( 8 )

Rev. 1.40 13 September 15, 2004

HT82K629A

USB Interface

HT82K629A has one control pipe for USB configuration, command and status type communication flows between cli ents software (BIOS, Win 98, Win 2K, Win ME and Win XP etc.) and HT82K629A keyboard encoder device. It also has two interrupt pipes to send the HID page 7 Standard keyboard code and ACPI, multimedia key correspondingly to cli ents software. For LED output, it comes from the control pipe.

HT82K629A can support USB standard request and HID class request. It is shown in the following table:

Item Command Description Support

USB get endpoints status such as STALL, wake-up, power information

USB clear device STALL, or remote wake-up function.

USB set device STALL, or remote wake-up function.

USB get HT82K629A device, configura tion information

USB get HT82K629A string descriptor (option command)

USB set device descriptor data (option command)

USB get HT82K629A HID, report information

USB set device descriptor data (option command)

USB get keyboard, ACPI, multimedia data

USB get boot or report protocol for endpoint

USB set boot or report protocol for end point

Yes

No, response STALL

Yes

No, response STALL

Yes

Yes (default report protocol)

Yes

USB1.1 Standard Request

HID1.1 Class Request

Get_Status

Clear Feature

Set Feature

Set Address USB set device address Yes

Get_Descriptor

Set_Descriptor

Get_Configuration USB get device, configuration value Yes (default 0 value)

Set_Configuration USB set device, configuration value Yes

Get_Interface USB get device, interface No, response STALL

Set_Interface USB set device, interface No, response STALL

SYNCH_Frame USB output frame number No, response STALL

Get_Descriptor

Set_Descriptor

Get_Report

Set_Report Set keyboard LED Yes

Get_Protocol

Set_Protocol

Get_Idle USB set keyboard idle rate Yes (default 500ms)

Set_Idle USB get keyboard idle rate Yes

Keyboard Output Format for USB Interface

Endpoint1 - standard keyboard endpoint The Endpoint1 of HT82K629Ais used to send standard keyboard key code and is configured asinterrupt pipe. It con tain 8 bytes data. The first byte is a modified byte to send the left and right of the (Shift, ALT, CTRL and WIN) key sta tus. It is in bitmap format. The second byte is a reserved byte. The third to eight bytes are used to send the other HID page7 key codes (except for the above modified key). The key code list is shown as the USB HID standard keyboard code table.

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

R_Win R_ALT R_Shift R_Ctrl L_Win L_ALT L_Shift L_Ctrl

1: Key is pressed 0: Key is released

The Modified Byte Definition

Rev. 1.40 14 September 15, 2004

HT82K629A

Endpoint2 - ACPI, multimedia key endpoint

The Endpoint2 of the HT82K629A is used to send ACPI and multimedia key and is configured as interrupt pipe. For ACPI, there are two bytes data, the first byte is report ID byte = 01H, the second is ACPI key status.

Byte No. Bit 7 Bit6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

1 00000001b

2 00000b Wake-up Sleep Power

1: Key is pressed 0: Key is released

The ACPI Key Byte Definition

For multimedia keys, there are four bytes data, the first byte is report ID byte = 02H, The second to fourth is the multimedia key status.

Byte No. Bit 7 Bit6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

1 00000010b

2 Eject CD Stop

4 Rewind Record Minimize

1: Key is pressed 0: Key is released

USB LED output Client Software Output one byte LED data to HT82K629A, to control the LED status, through Endpoint0. The format is shown in the following table:

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

1: LED on 0: LED off

Refresh

WWW

Stop

00000b Scroll Lock Cap Lock Num Lock

Prev.

Track

WWW

Forward

The Multimedia Key Bytes Definition

Track

WWW

Back

Computer

Play/Pause Mute Volume- Volume+

WWW

Home

Screen

Save

WWW

Favorites

Calculator Explorer Media

WWW

E-Mail

USB HID Standard Keyboard Code Table

Key Number and Symbol HID Page HID Code Key Number and Symbol HID Page HID Code

1 ~ ` 073554> . 0737

2! 1071E55? / 0738

3 @ 2 07 1F 56 Keycode56 (*BJ) 07 87

4 # 3 07 20 57 Shift (R) 07 E5

5 $ 4 07 21 58 Ctrl (L) 07 E0

6 % 5 07 22 60 Alt (L) 07 E2

7 ^ 6 07 23 61 Ctrl (L) 07 2C

8 & 7 07 24 62 Alt (R) 07 E6

9 * 8 07 25 64 Ctrl (R) 07 E4

10 ( 9 07 26 75 Insert 07 49

11 ) 0 07 27 76 Delete 07 4C

12 _ - 07 2D 79 Left Arrow 07 50

13 + = 07 2E 80 Home 07 4A

Rev. 1.40 15 September 15, 2004

HT82K629A

Key Number and Symbol HID Page HID Code Key Number and Symbol HID Page HID Code

14 Keycode14 (*J) 07 89 81 End 07 4D

15 Back Space 07 2A 83

16 Tab 07 2B 84

17 Q 07 14 85 PgUp 07 4B

18 W 07 1A 86 PgDn 07 4E

19 E 07 08 89

20 R 07 15 90 Num Lock 07 53

21 T 07 17 91 7 Home 07 5F

22 Y 07 1C 92 4

23 U 07 18 93 1 End 07 59

24 I 07 0C 95 / 07 54

25 O 07 12 96 8

26 P 07 13 97 5 07 5D

27 { [ 07 2F 98 2

28 } ] 07 30 99 0 Ins 07 62

29 Keycode29 (*4) 07 31 100 * 07 55

30 Caps Lock 07 39 101 9 PgUp 07 61

31 A 07 04 102 6

32 S 07 16 103 3 PgDn 07 5B

33 D 07 07 104 . Del 07 63

34 F 07 09 105 - 07 56

35 G 07 0A 106 + 07 57

36 H 07 0B 107 Keycode107 (*B) 07 85

37 J 07 0D 108 Enter_R 07 58

38 K 07 0E 110 ESC 07 29

39 L 07 0F 112 F1 07 3A

40 : ; 07 33 113 F2 07 3B

42 Keycode42 (*5BJ) 07 32 115 F4 07 3D

43 Enter_L 07 28 116 F5 07 3E

44 Shift (L) 07 E1 117 F6 07 3F

45 Keycode45 (*5B) 07 64 118 F7 07 40

46 Z 07 1D 119 F8 07 41

47 X 07 1B 120 F9 07 42

48 C 07 06 121 F10 07 43

49 V 07 19 122 F11 07 44

50 B 07 05 123 F12 07 45

51 N 07 11 124 Print Screen 07 46

52 M 07 10 125 Scroll Lock 07 47

53 < , 07 36 126 Pause 07 48

²¢

07 34 114 F3 07 3C



07 52

07 51

07 4F

07 5C

07 60

07 5A

07 5E

Rev. 1.40 16 September 15, 2004

HT82K629A

Key Number and Symbol HID Page HID Code Key Number and Symbol HID Page HID Code

*4- 104 Keyboard Only *5- 105 Keyboard Only

Key Number and Symbol HID Page HID Code

131 (*J) Japanese J131 07 8B

132 (*J) Japanese J132 07 8A

133 (*J) Japanese J133 07 88

150 Korea KC-L, Key_Hangul 07 90

151 Korea KC-R, Key_Hanja 07 91

ACPI Power 01 81

ACPI Sleep 01 82

ACPI Wake-up 01 83

Windows Key L WIN 07 E3

Windows Key R WIN 07 E7

Windows Key APP 07 65

Multimedia Key Number and Symbol HID Page HID Code

E-Mail 0C 018A

WWW Home 0C 0223

WWW Favorites 0C 022A

WWW Search 0C 0221

WWW Refresh 0C 0227

WWW Stop 0C 0226

WWW Forward 0C 0225

WWW Back 0C 0224

Media 0C 0183

Play/Pause 0C 00CD

CD Stop 0C 00B7

Prev Track 0C 00B6

Next Track 0C 00B5

Volume+ 0C 00E9

Volume- 0C 00EA

Mute 0C 00E2

My Computer 0C 0194

Calculator 0C 0192

The following keys need a driver

Explorer (Internet Browser) 0C 0196

Screen Save 0C 019E

Record 0C 00B2

Rewind 0C 00B4

Minimize 0C 0206

*B - 107 Keyboard Only *J - 109 Keyboard Only

Rev. 1.40 17 September 15, 2004

Function Key Usage

Status

Key

Location

7 &7 Home 7 7

OFF OFF ON OFF OFF ON ON ON

Num Lock

Num

Lock

HT82K629A

Num Lock

8*8

9 (9 PgUp 9 9

0)0 * * 0

II 5 I

PP - - P

J J End 1 J

L L PgDn 3 L

:; :; + + :;

M M Ins 0 M

>. >. Del . >.

?/ ?/ / / ?/

Enter Enter (L) Enter(R) Enter(R) Enter(L)

F1/F11 F1 F11 F1 F11

F2/F12 F2 F12 F2 F12



F10/

ScrLock

/PgUp 

¯/PgDn ¯

¬/Home ¬

®/End ®

Rev. 1.40 18 September 15, 2004

F10 ScrLock F10 ScrLock

Page Up

Page Down

Home

End



Page Up

Page Down

Home

End

Key Matrix

C0/PB0

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

C17/PC5

C18/PC6

C19/PC7

HT82K629A

R0/PA0 R1/PA1 R2/PA2 R3/PA3 R4/PA4 R5/PA5 R6/PA6 R7/PA7

PAUSE

126

7(Home)

|(\)

SCROLL

125

Screen

Save

KC-L

150

Media E-mail

Computer

Wake-up

106

9(PgUp)

101

8()

Pre Track Stop Play/Pause CTRL-R64Next Track CTRL-L

TAB

CAPS

114

](})

118

4(¬)

BACK

[({)

WIN-L Rec Rew Min Eject

Calculator

SHIFT-L44SHIFT-R

107

6(®)

102

1(End)

\(|)

Vol- ALT-L

;(:)

WIN-R 00 000 F2/F12 KC-R

WWW Home

/

Page Up¯/Page Down

ENTER-R

108

3(PgDn)

103

2(¯)

ESC

110

|(\)

115

117

SPACE61NUM LOCK

F11

122

'(²)

WWW

Back

WWW



.(Del)

104

0(Ins)

,(<)

.(>)

ENTER-L

Vol+ ALT-R

WWW

Forward

Home

100

|(\)

¬/

N-CHG

131

CHG

132

ROMA

133

123

WWW

Stop

END

105

\(-)

APP

F12

/(?)

®/

112

113

5(%)

=(+)

119

DEL76POWER

120

Mute

WWW

Refresh

Explorer

F1/F11 FN

HOME

PgUp

¢(~)

6(^)

_(-)

INS

116

2(@)

121

SCREEN

Scroll

151

WWW

Bkmk

END

PgDn

SLEEP

1(!)

3(#)

4($)

7(&)

8(*)

9(¢(¢)

F10

0(¢)¢)

F10/

Rev. 1.40 19 September 15, 2004

The following table shows which key needs a driver in the different OS

OS Key Need Drive

Media, My computer, Calculator

E-mail, WWW Home, WWW Back, WWW Forward, WWW Stop, WWW Refresh,

MS DOS, Win95

Win 98

Win ME,Win 2K, Win XP

WWW Favorite, WWW Search

Vol-, Vol+, Mute, Pre Track, CD Stop, Play/Pause, Next Track

Rec, Rew, Min, Eject, Screen Save, Explorer

Power, Wake-up, Sleep

Media, My computer, Calculator

E-mail, WWW Home, WWW Back, WWW Forward, WWW Stop, WWW Refresh, WWW Favorite, WWW Search

Vol-, Vol+, Mute, Pre Track, CD Stop, Play/Pause, Next Track

Rec, Rew, Min, Eject, Screen Save, Explorer

HT82K629A

Rev. 1.40 20 September 15, 2004

Application Circuits

HT82K629A

O S C I

O S C O

R E S E T

V S S

C 1 8 C 1 9

C 1 1 C 1 0

R 4 R 5 R 6 R 7

C 9 C 8

C 7 C 6 C 5 C 4 C 3 C 2

4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 3 3 2 3 1

6 M H z

3 0 2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2 2 1

F 0 . 1mF

0 . 1

1 0 0 k

1 0 k

V D D

U S B -

U S B +

V S S

U S B C O N

C 1 7

C 1 6

R 3

R 2

R 1

R 0

F n S e l e c t

N U M

C A P S

1 0

S C R O L L

1 1

C 1 2

1 2

C 1 3

1 3

C 1 4

1 4

C 1 5

1 5

V D D

1 6

V 3 3 O

1 7

U S B D + / C L K

1 8

U S B D - / D A T A

1 9

C 0

2 0

C 1

H T 8 2 K 6 2 9 A

F n _ S e l = 1 o r f l o a t i n g : d i s a b l e s M i n i - k e y b o a r d f u n c t i o n F n _ S e l = 0 : e n a b l e s M i n i - k e y b o a r d f u n c t i o n

V D D

3 3 p F

N u m L o c k

D 1

D 3

S c r o l l L o c k

M C U V D D

1 . 5 k

3 3 p F

2 2

F 0 . 1mF

0 . 1

2 2

M C U V D D

0 . 0 1mF1 0mF

C a p s L o c k

D 2

2 2

1 2 3 4

Note: For single side PCB, the GND should be routed first. Avoid routing the GND line and VDD line with jumping

wires.

The GND and VDD lines should be as wide as possible, also it is recommended that the GND and VDD lines are placedin an empty area, in order to increase their area. Wherever possiblethe GND plane should surround pins such as OSCI, OSCO, VDD, V330, RESET

etc and other related circuits to minimize the noise effects.

The GND/VDD loop area should be minimized. Try to keep GND and VDD lines parallel.

The external 22W resistor and 0.01mF capacitor connected to the VDD pin should be placed as close as possible to the VDD pin.

Allow room in the layout for the 0.1mF capacitor that is connected to the VDD pin. This capacitor should be con nected as closeas possible to the VDD pin. The function of this capacitor isto filter out high frequency noise.

The lines connecting the OSCI and OSCO pins to the crystal must be kept as short as possible to minimize any cross coupling of noise from these pins.

The 0.1mF capacitor connected to the RESET

pin should be placed as close as possible to the RESET pin. The function of this capacitor is to filter out high frequency noise to minimize the possibility of a glitch on this line causing a false reset.

The 0.1mF capacitor connected to the V33O pin should be placed as close as possible to the V33O pin.

The USBD+ and USBD- lines to the USB connector should be kept as short as possible and should not be placed close to the other lines to reduce the possibility of noise coupling into other lines. The externally con nected 1.5kW resistor connected to the USBD- pin should be placed as close to as possible the USBD- pin.

The USB cable should preferably have proper shielding.

Rev. 1.40 21 September 15, 2004

Package Information

40-pin DIP (600mil) outline dimensions

HT82K629A

4 0

Symbol

F G

Min. Nom. Max.

A 2045

B 535

C 145

D 125

E16

F50

H 595

I 635

2 1

2 0

Dimensions in mil

¾ ¾ ¾ ¾ ¾ ¾

100

¾ ¾

a 0°¾15°

2065

555

155

145

615

670

Rev. 1.40 22 September 15, 2004

Holtek Semiconductor Inc. (Headquarters)

No.3, Creation Rd. II, 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, No. 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)

HT82K629A

Holtek Semiconductor Inc. (Shanghai Sales Office)

7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn

Holtek Semiconductor Inc. (Shenzhen Sales Office)

5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District, Shenzhen, China 518057 Tel: 0755-8616-9908, 8616-9308 Fax: 0755-8616-9533

Holtek Semiconductor Inc. (Beijing Sales Office)

Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125

Holtek Semiconductor Inc. (Chengdu Sales Office)

709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 028-6653-6590 Fax: 028-6653-6591

Holmate Semiconductor, Inc. (North America Sales Office)

46729 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com

The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek as sumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices or systems. 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.

Rev. 1.40 23 September 15, 2004

HOLTEK HT82K629A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Features

General Description

Block Diagram

Pin Assignment

Pin Description

Absolute Maximum Ratings

D.C. Characteristics

A.C. Characteristics

Functional Description

Timing Diagrams

Application Circuits

Package Information