PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
1.2 Signal Description
+ Y
+ X
Figure 2. Pin Configuration
Table 1. Signal Pins Description
Signal Name
Pin No.
Type Description
PWR Anode of the VCSEL LASER, voltage range: 2.7V ~ 3.3V
SPI
VLD
I2C
VLD
1
2
VDD is the main power supply for IC circuits
VDDA
VDDA
PWR
High voltage Segment (VDD: 2.1V ~ 3.6V): VDDA is 1.8V regulator output and
should connect a 4.7uF capacitor to ground
Low Voltage Segment (VDD: 1.7V ~ 2.1V): VDDA should connect to VDD directly
3
VDD
VDD
PWR
4
5
VSS
VSS
SCL
GND Chip ground
SCLK : Clock input for SPI interface
SCLK
IN
SCL : Clock input for I2C interface
SDIO : Bi-directional I/O for SPI interface
SDA : Bi-directional I/O for I2C interface
OUT Motion detection output (active low)
6
7
SDIO
SDA
I/O
MOTION MOTION
NCS : Chip select for 3-wire SPI interface (active low)
8
9
NCS
ID_SEL
TEST
IN
ID_SEL : Slave ID (7-bit) Selection for I2C interface
High = 0x73, Low=0x75, NC = 0x79
This pin is located on the back of the chip and is for PixArt testing purpose.
Please do NOT connect it to any part of the PCB. Please refer to Figure 9.
TEST
NC
Version 1.2 | 31 May 2017 | 21002AEN
PixArt Imaging Inc. http://www.pixart.com
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PIXART [ PIXART IMAGING INC. ]
