PAN3401 Datasheet, PDF (3/15 Pages) Pixart Imaging Inc. – PS/2 OPTICAL MOUSE SINGLE CHIP

PixArt Imaging Inc.
PAN3401
2. Block Diagram and Operation
LED
LED
DRIVE
WHEEL
Z1
Z2
POWER ON
RESET
CMOS IMAGE
SENSOR
PS/2 Optical Mouse Single Chip
VDD
VSS
5V POWER
BL
BUTTON
BM
BR
PS/2
INTERFACE
CLOCK
DATA
DIGITAL
SIGNAL
PROCESSOR
VREF
VOLTAGE
REFERENCE
PS/2 MOUSE CONTROLLER
INTERNAL
OSCILLATOR
OSC_RES
Figure 3. Block Diagram
The PAN3401 is a CMOS process optical mouse sensor single chip with PS/2 interface 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 12-pin optical package
and comes with the resolution of 400/800/1000 counts per inch (CPI) and the rate of motion up to 28 inches per
second. It is also featured crystal-less (Internal ± 10% accurate oscillator) to save customer’s BOM cost. The
PAN3401 includes PS/2 interface so that no mouse controller is needed to interface through PS/2. The PAN3401
can receive command and echo status or data format which are compatible with IBM^® PS/2 mouse and
Microsoft^® 3D PS/2 mouse.
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PixArt Imaging Inc.
E-mail: [e-mail]
V1.3, Mar. 2008