PixArt Imaging Inc.

PAN101B

CMOS Optical Navigation Sensor

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PixArt Imaging Inc.

V1.4, FEB. 2003

2. Block Diagram and Operation

CMOS

IMAGE

SENSOR

DIGITAL

SIGNAL

PROCESSOR

POWER ON

RESET

SERIAL

INTERFACE

LED

DRIVE

CONTROL REGISTER

SCLK

SDIO

OSCILLATOR

YA

YB

XA

XB

LED

VRB

VRT

PD

VDDD

VSSD

OSCIN

OSCOUT

SERIAL

INTERFACE

QUADRATURE

OUTPUTS

RESONATOR

VOLTAGE

REFERENCE

3V

POWER

VSS_LED

VAY

VSSA

VDDA

The PAN101B is a low cost CMOS-process optical navigation sensor with DSP integration chip that

serves as a non-mechanical motion estimation engine for implementing a computer mouse. It is based on

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 20 pin 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.

Figure 3. Block Diagram