PixArt Imaging Inc.

PAW3101DB

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.

V3.1 May. 2008

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

Figure 3. Block Diagram

The PAW3101DB is a 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 mouse sensor is in a 8-pin optical

package. The current X and Y information are available in registers accessed via a serial port. The word "mouse

sensor," instead of PAW3101DB, is used in the document.