PAW3501UI Datasheet, PDF (7/14 Pages) Pixart Imaging Inc. – USB OPTICAL MOUSE SENSOR SINGLE CHIP

PixArt Imaging Inc.
PAW3501UI
USB Optical Mouse Sensor Single Chip
5. USB Interface
5.1 USB Command Set Description (USB Descriptor)
The USB HOST detects USB mouse device plug-in and assigns a new unique address to the USB mouse device,
then asking USB mouse device for information about the device description, configuration description, and
assigning a configuration value for USB mouse device during enumeration period. After enumeration, the USB
mouse device is able to transfer motion and button value to the USB host.
Descriptor Type
Device Descriptor (18 bytes)
Configuration Descriptor (9 bytes)
Interface Descriptor (9 bytes)
Human Interface Device Descriptor
(9 bytes)
Endpoint Descriptor (7 bytes)
Human Interface Device Report
Descriptor (72 bytes, 3D3B)
Byte Byte Byte Byte Byte Byte Byte Byte
12 01 10 01 00 00 00 08
3A 09 00 25 00 01 01 02
00 01
09 02 22 00 01 01 04 A0
32
09 04 00 00 01 03 01 02
00
09 21 10 01 00 01 22 48
00
07 05 81 03 04 00 0A
05 01 09 02 A1 01 05 09
19 01 29 03 15 00 25 01
95 03 75 01 81 02 95 01
75 05 81 03 05 01 09 01
A1 00 09 30 09 31 15 81
25 7F 75 08 95 02 81 06
C0 09 38 95 01 81 06 09
3C 15 00 25 01 75 01 95
01 B1 22 95 07 B1 01 C0
5.2 USB Data Report Format
The USB report has two data formats, depending on boot or report protocol is selected. One kind of data format
is the boot protocol used in legacy environment as 4.2.1. The other kind of data format is USB report protocol
format which includes Z-wheel movement data in the fourth byte as 4.2.2. The Z-wheel is moved forward the
fourth byte data is 01H, the Z-wheel is moved backward the fourth byte data is FFH, and the Z-wheel is idle the
fourth byte data is 00H.
5.2.1 USB Boot Protocol for Legacy Operation
Byte Bit
1
0
1
2~7
2 0-7
3 0-7
Symbol
BL
BR
NC
X0 ~ X7
Y0 ~ Y7
Description
1 = Left button pressed
1 = Right button pressed
Reserved
X data (D0 - D7). A positive value indicates motion to the right; a negative value
indicates motion to the left. Bit 0 = LSB.
Y data (D0 - D7). A positive value indicates device motion upward; a negative
value indicates motion downward. Bit 0 = LSB.
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PixArt Imaging Inc.
E-mail: [e-mail]
V2.1 April. 2008