PixArt Imaging Inc.

PAW3501UI

USB Optical Mouse Sensor Single Chip

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

8

PixArt Imaging Inc.

V2.1 April. 2008

5.2.2 USB Report Protocol

Byte

Bit

Symbol

Description

0

BL

1 = Left button pressed

1

BR

1 = Right button pressed

2

BM

1 = Middle button pressed

3

B4

1 = B4 button pressed

4

B5

1 = B5 button pressed

1

5 ~ 7

NC

Reserved

2

0 - 7

X0 ~ X7 X data (D0 - D7). A positive value indicates motion to the right; a negative value

indicates motion to the left. Bit 0 = LSB.

3

0 - 7

Y0 ~ Y7 Y data (D0 - D7). A positive value indicates device motion upward; a negative

value indicates motion downward. Bit 0 = LSB.

4

0 - 7

Z0 ~ Z7

Z-wheel motion data (D0 - D7). A positive value indicates device motion

downward; a negative value indicates motion upward. The Z0 - Z7 limit value is

±7. Bit 0 = LSB.