PixArt Imaging Inc.

PAN3201DH

CMOS Optical Mouse Sensor

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PixArt Imaging Inc.

V1.0, Mar. 2006

2. Block Diagram and Operation

DIGITAL

SIGNAL

PROCESSOR

POWER ON

RESET

SERIAL

INTERFACE

LED

DRIVER

CONTROL

REGISTER

SCLK

SDIO

OSCILLATOR

YA

YB

XA

XB

LED

VREF

PD

VDD

VSSD

OSCIN

OSCOUT

SERIAL

INTERFACE

QUADRATURE

OUTPUT

RESONATOR

1.8V

POWER

VSS_LED

VSSA

VDDD

VDDA

CMOS IMAGE

SENSOR

Figure3. Block diagram

The PAN3201DH is a high performance and low power CMOS-process optical mouse sensor with DSP

integration chip 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 20pin optical package. The output format is two-channel quadrature (X and Y direction),

which emulates encoder phototransistors. The current X and Y information are also available in registers

accessed via a serial port.