PAW3402 Datasheet, PDF (3/15 Pages) Pixart Imaging Inc. – PS/2 OPTICAL MOUSE SOC

PixArt Imaging Inc.
PAW3402 / PAW3412
1.3 Pin Assignment For Sensor Rotate -90˚
PS/2 Optical Mouse SOC
Figure 3. Top View Pinout
2. Block Diagram and Operation
Figure 4. Top View of Mouse
WHEEL
LED
Z1
Z2
LED
DRIVE
POWER ON
RESET
CMOS IMAGE
SENSOR
VDD
VSS
5V POWER
BL
BUTTON
BM
BR
DIGITAL
SIGNAL
PROCESSOR
VREF
VOLTAGE
REFERENCE
PS/2
INTERFACE
CLOCK
DATA
PS/2 MOUSE CONTROLLER
INTERNAL
OSCILLATOR
OSC_RES
Figure 5. Block diagram
PAW3402 / PAW3412 is a CMOS process optical mouse SOC with PS/2 interface that serves as a non-
mechanical motion estimation engine for implementing a computer mouse. It is based on new optical navigation
technology, which measures changes in position by optically acquiring sequential surface images (frames) and
mathematically determining the direction and magnitude of movement. The sensor is in a 12-pin optical package
and comes with the resolution of 500 / 800 / 1000 counts per inch (cpi) and the rate of motion up to 28 inches per
second. It is also featured resonator-less (Internal ± 10% accurate oscillator) to save customer’s BOM cost.
PAW3402 / PAW3412 include PS/2 interface so that no mouse controller is needed to interface through PS/2.
PAW3402 / PAW3412 can receive command and echo status or data format which are compatible with IBM
PS/2 mouse and Microsoft 3D PS/2 mouse.
* The word “PS/2 Mouse”, instead of “ PAW3402 / PAW3412”, is used in the document.
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PixArt Imaging Inc.
E-mail: [e-mail]
V1.0, Feb. 2008