Pin Assignment

Pin Description

Pin Name

I/O

Description

USB Interface (2 pins)

USBD+/CLK

I/O

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

USBD

-/DATA I/O USB data minus or PS2 Data, F/W auto-detect USBD- for USB, DATA for PS2

General purpose I/O (11 pins)

X1, X2

I

X-axis photo input with built-in Holtek

¢s special dynamic photo input resistor

Y1, Y2

I

Y-axis photo input with built-in Holtek

¢s special dynamic photo input resistor

Z1, Z2

I

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

L, R, M

I

Input ports with pull-high resistor. These pads can function as Left, Right and Middle button in-

put lines.

SEL0*

SEL1*

I

I

SEL0=1: 400DPI (default)

SEL0=0: 800DIP

SEL1=1: USB and PS2 combo (default)

SEL1=0: USB only

Miscellaneous (7 pins)

VSS

¾ Negative power supply, ground

V33O

O

3.3V voltage output

RESET

I

Chip reset input, low active

LED

I/O

Drives LED output

VDD

¾ 5V positive power supply

OSC2

O

6MHz OSC output

OSC1

I

6MHz OSC input

Note:

²*² These functions are only available on date code ¢-4¢ version

Absolute Maximum Ratings

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.

HT82M98A

Rev. 2.00

2

October 31, 2006

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

H T 8 2 M 9 8 A

2 0 D I P - A

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

S E L 0

O S C 1

O S C 2

V D D

L E D

M

R

L

Z 2

Z 1

S E L 1

1 8

1 7

1 6

1 5

1 4

1 3

1 2

1 1

1 0

1

2

3

4

5

6

7

8

9

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

O S C 1

O S C 2

V D D

L E D

M

R

L

Z 2

Z 1

H T 8 2 M 9 8 A

1 8 D I P - A