PixArt Imaging Inc.
PAN301A
CMOS Optical Mouse Sensor
2. Block Diagram and Operation
LED
VSS_LED
LED
DRIVE
POWER ON
RESET
VOLTAGE REGULATOR
AND POWER CONTROL
CMOS
IMAGE
SENSOR
QUADRATURE
OUTPUT
QUADRATURE
OUTPUTS
XA
XB
YA
YB
VDD
VSS
VSS
5V
POWER
PD
DIGITAL
SIGNAL
PROCESSOR
VREFA VOLTAGE
REFERENCE
VREFB
SERIAL
INTERFACE
SCLK
SDIO
SERIAL
INTERFACE
CONTROL REGISTER
OSCILLATOR
OSCIN
OSCOUT
RESONATOR
Figure 3. Block diagram
The PAN301A is a high performance 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.
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.
3
V1.3, MAY. 2004
PixArt Imaging Inc.
E-mail:
fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
