PixArt Imaging Inc.

PAW3501UI

USB Optical Mouse Sensor Single Chip

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2

PixArt Imaging Inc.

V2.1 April. 2008

1. Pin Configuration

1.1 Pin Assignment

1

13

12

24

1

13

12

24

LB

RB

+ X

+ Y

Figure 1. Top View Pinout

Figure 2. Top View of Mouse

1.2 Pin Description

Pin # Name

Type

Definition

1

Z1

IN

Z axis, support two kinds of scroller input, opto-mechanical and mechanical

2

Z2

IN

Z axis, support two kinds of scroller input, opto-mechanical and mechanical

3

SR

IN

Sensor rotate (0, 1, floating) => (-90°, +90°, 0°), 3-states input

4

IRCTL

OUT

IR LED control

5

BM

IN

Button middle key input, normal pull-high (50k), press connect to low

6

BL

IN

Button left key input, normal pull-high (50k), press connect to low

7

DT

IN

Device type (0, 1, floating) => (3D3B, 2D2B, 3D5B), 3-states input

8

B4

IN

Button 4 key input, normal pull-high (50k), press connect to low

9

B5

IN

Button 5 key input, normal pull-high (50k), press connect to low

10

CPI

IN

CPI select to (0, 1, floating) => (800, 600, 400), 3-states input

11

VSSLED

GND

LED ground

12

LED

I/O

LED control

13

VREFB

BYPASS Analog voltage reference

14

VREFA

BYPASS Analog voltage reference

15

VDD5V

PWR

Chip power VDD, 5.0V

16

VSS

GND

Chip ground

17

VDDQ

BYPASS IO voltage reference

18

OSCIN

IN

Oscillator input, connect to 18.000MHz crystal or resonator

19

OSCOUT

OUT

Oscillator output, connect to 18.000MHz crystal or resonator

20

D+

I/O

USB D+

21

D-

I/O

USB D-

22

BR

IN

Button right key input, normal pull-high (50k), press connect to low

23

RFU

IN

Reserve for future use, PAW3501UP used the pin to switch USB or PS/2

24

TEST

IN

Test pin. It is needed to connect to GND in normal operation mode