PixArt Imaging Inc.

PAW3102DB

CMOS Optical Mouse Sensor

All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission

.

9

PixArt Imaging Inc.

V1.2, April. 2008

0x1B

Configuration

Bit

7

6

5

4

3

2

1

0

Field

XY_exch

Y_inv

X_inv

Reserved[4:0]

Usage

Register 0x1B allows the user to change the XY direction of the mouse sensor. Shown below are the

bits, their default values, and optional values.

Configuration[7:5]

“011” = Typical direction 0°

“110” = The mouse sensor turn -90°

“101” = The mouse sensor turn +90°

Notes:

When write Configuration[7:5], users have to keep Configuration[4:0] values. So the only way to

do this is read Configuration[7:0] first, set/clear the desired bits of Configuration[7:5] and keep the

same value of Configuration[4:0] , then write Configuration[7:0].

Field Name

Description

XY_exch

X and Y direction exchange function

0 = Disable (Default)

1 = Enable (X and Y direction exchange)

Y_inv

Y direction inverse function

0 = Enable(Y direction inverse)

1 = Disable (Default)

X_inv

X direction inverse function

0 = Enable (X direction inverse)

1 = Disable (Default)

Notes

Reserved[4:0]

Reserved for future use. Don’t change the reserved bits during register writes. The

user can change other bits, but the reserved bits must be kept during register writes.