Pin Assignment

Pin Description

Pin No.

Pin Name

I/O

Description

USB Interface (2 pins)

3

USBD+/CLK

I/O

USB data plus or PS2 Clock, F/W auto-detect USBD+ for USB, CLK for PS2

4

USBD

-/DATA

I/O

USB data minus or PS2 Data, F/W auto-detect USB

- for USB, DATA for PS2

General purpose I/O (11 pins)

6, 7

X1, X2

I

X-axis photo input with built-in Holtek

¢s special dynamic photo input resistor

8, 9

Y1, Y2

I

Y-axis photo input with built-in Holtek

¢s special dynamic photo input resistor

12, 13

Z1, Z2

I

Z-axis input supports two kinds of scroller input; optomechanical and me-

chanical

10, 11, 14

15, 16

L, R, M, B4, B5

I

Input ports with pull-high resistor. These pads can function as Left, Right, Mid-

dle, B4 and B5 button input lines.

Miscellaneous (7 pins)

1

VSS

¾ Negative power supply, ground

2

V33O

O

3.3V voltage output

5

RESET

I

Chip reset input, low active

17

LED

I/O

Drives LED output

18

VDD

¾ 5V positive power supply

19

OSC2

O

6MHz OSC output

20

OSC1

I

6MHz OSC input

Absolute Maximum Ratings

Supply Voltage ............................................

-0.3V to 6V

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

-50°Cto125°C

Operating Temperature...........................

-25°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.

HT82M980A

Rev. 1.40

2

February 10, 2003

V S S

V 3 3 O

U S B D + / C L K

U S B D - / D A T A

R E S E T

X 1

X 2

Y 1

Y 2

B 4

O S C 1

O S C 2

V D D

L E D

M

R

L

Z 2

Z 1

B 5

H T 8 2 M 9 8 0 A

2 0 D I P - A

2 0

1 9

1 8

1 7

1 6

1 5

1 4

1 3

1 2

1 1

1

2

3

4

5

6

7

8

9

1 0