Pin Assignment

Pin Description

Pin No.

Pin Name

I/O

Description

1, 2, 11~14

19~26, 31~34

39, 40

C0~C19

O

Keyboard matrix scanning output pins

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 VSS.

8

NUM

O

Num lock indicator

9

CAPS

O

Caps lock indicator

10

SCROLL

O

Scroll lock indicator

15

VDD

¾

Positive power supply

16

V33O

¾

3.3V regulator output

17

USBD+/CLK

I/O

USBD- or PS2 CLK I/O line

USB or PS2 function is controlled by software control register.

18

USBD-/DATA

I/O

USBD- or PS2 DATA I/O line

USB or PS2 function is controlled by software control register.

27

VSS

¾

Negative power supply, ground

28

RESET

I

Schmitt trigger input. Active low.

29

30

OSCO

OSCI

O

I

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

the internal system clock.

Absolute Maximum Ratings

Storage Temperature ...........................

-50°Cto125°C

Operating Temperature ..............................0

°Cto70°C

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.

HT82K629A

Rev. 1.30

2

April 16, 2004

4 0

3 9

3 8

3 7

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 9

2 0

C 1 7

C 1 6

R 3

R 2

R 1

R 0

F n _ S e l

N U M

C A P S

S C R O L L

C 1 2

C 1 3

C 1 4

C 1 5

V D D

V 3 3 O

U S B D + / C L K

U S B D - / D A T A

C 0

C 1

C 1 8

C 1 9

R 4

R 5

R 6

R 7

C 1 1

C 1 0

C 9

C 8

O S C I

O S C O

R E S E T

V S S

C 7

C 6

C 5

C 4

C 3

C 2

H T 8 2 K 6 2 9 A

4 0 D I P - A