PixArt Imaging Inc.

PAN3101

CMOS Optical Mouse Sensor

All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission

.

3

PixArt Imaging Inc.

V1.0 MAR. 2005

2. Block Diagram and Operation

CMOS

IMAGE

SENSOR

DIGITAL

SIGNAL

PROCESSOR

POWER ON

RESET

SERIAL

INTERFACE

LED

DRIVER

CONTROL REGISTER

SCLK

SDIO

OSCILLATOR

LED

VREF

VDD

OSCIN

OSCOUT

SERIAL

INTERFACE

RESONATOR

VOLTAGE

REFERENCE

5V POWER

VSS

The PAN3101 is a low cost 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 8pin optical package. The current X and Y information are available in registers accessed

via a serial port.

Figure 3. Block diagram