PAN3401 Datasheet, PDF (9/15 Pages) Pixart Imaging Inc. – PS/2 OPTICAL MOUSE SINGLE CHIP

PixArt Imaging Inc.
PAN3401
PS/2 Optical Mouse Single Chip
6. Data Format
The PAN3401 supports two different PS/2-compatible packet formats, depending upon the following operational
modes:
• Standard 2D mode (2D3B)
• Standard 3D mode (3D3B)
6.1 Standard 2D Mode Format
A standard 2D PS/2-compatible mouse motion report consists of a 3-byte packet defined as below.
Byte
Bit Symbol Description
0
BL 1 = Left button pressed
1
BR 1 = Right button pressed
2
BM Always = 0, reserved for middle button
1
3
1 Always = 1, reserved for future use
4
Xs X data sign, 1 = negative
5
Ys Y data sign, 1 = negative
6
X_OV X data overflow, 1 = overflow
7
Y_OV Y data overflow, 1 = overflow
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.
6.2 Standard 3D Mode Format
A standard 3D PS/2-compatible mouse motion report consists of a 4-byte packet defined as below.
Byte
Bit Symbol Description
0
BL 1= Left button pressed
1
BR 1 = Right button pressed
2
BM 1= Middle button pressed
1
3
1 Always = 1, reserved for future use
4
Xs X data sign, 1 = negative
5
Ys Y data sign, 1 = negative
6
X_OV X data overflow, 1 = overflow
7
Y_OV Y data overflow, 1 = overflow
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.
Z-wheel motion data (D0 - D7). A positive value indicates device
4
0-7 Z0 ~ Z7 motion downward; a negative value indicates motion upward. The Z0-
Z7 limit value is ±7. Bit 0 = LSB.
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PixArt Imaging Inc.
E-mail: [e-mail]
V1.3, Mar. 2008