PixArt Imaging Inc.

PAW3401

12 PIN PS/2 Optical Mouse Sensor

There are 16 valid commands that transmit between the system and The PAW3401. All other commands will

cause an FE (Resend) response from the PAW3401. A second invalid command will cause an FC (error)

response from the PAW3401.

4.1 PS/2 Command Set

Hex Code

Command

Response

FF

Reset

FA, AA, 00

FE

Resend

XX, (XX, XX)

F6

Set Default

FA

F5

Disable

FA

F4

Enable

FA

F3, XX

Set Sampling Rate

FA, FA

F2

Read Device Type

FA, 00

F0

Set Remote Mode

FA

EE

Set Wrap Mode

FA

EC

Reset Wrap Mode

FA

EB

Read Data

FA, XX, XX, XX

EA

Set Stream Mode

FA

E9

Status Request

FA, XX, XX, XX

E8, XX

Set Resolution

FA, FA

E7

Set Scaling 2:1

FA

E6

Reset Scaling

FA

4.2 Set Sampling Rate (F3, XX)

Second Byte Hex Value (XX)

Sampling Rate

0A

10/sec

14

20/sec

28

40/sec

3C

60/sec

50

80/sec

64

100/sec

C8

200/sec

4.3 Status Request (E9)

Byte

Bit

Symbol

Description

0

BR

1 = Right button pressed.

1

BM

1 = Middle button pressed.

2

BL

1 = Left button pressed.

3

0

Always = 0, reserved for future use.

4

Scaling

0 = Scaling 1:1; 1 = Scaling 2:1.

5

Enabled

0 = Disabled; 1 = Enabled.

6

Remote mode

0 = Stream mode; 1 = Remote mode.

1

7

0

Always=0, reserved for future use.

2

0 - 7

Resolution

Current resolution setting. Bit 0 = LSB.

3

0 - 7

Sampling rate

Current sampling rate. Bit 0 = LSB.

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PixArt Imaging Inc.

V1.1, Dec. 2006

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