PixArt Imaging Inc.

PAC7301/PAC7302

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5

PixArt Imaging Inc.

V1.4 Nov 2007

9

VDDMA5

PWR

5V power for video analog circuit

10 VDDA33

BYPASS Analog power output 3.3V(for 2.5 regulator use)

11 VDDAY

BYPASS Analog power for sensor array 2.5V

12 VDDAYM

BYPASS Analog power for sensor CDS 2.5V

13 VDDA

BYPASS Analog power for Video PGA/ADC 2.5V

14 VSSA

GND

Analog ground

15 KEY#

IN

Snapshot control signal (Active Low, internal pull-up 100Kohm)

16 DP

I/O

DP for USB1.1 PHY

17 DN

I/O

DN for USB1.1 PHY

18 OSC_IN

IN

Crystal input

19 OSC_OUT

OUT

Crystal output

20 VDDQ

BYPASS Power for I/O and PHY, 3.3V

21 VDDMD5

PWR

5V power for digital circuit

22 VDDD

BYPASS Logic power for digital circuit, 1.8V

23 VSSQ

GND

Digital Ground for I/O and PHY, digital core.

24 EPR_EN

IN

EEPROM enable pin active high

25 LED

OUT

LED driver

26 NC

-

No Connection

27 NC

-

No Connection

28 VSSQ

GND

Digital Ground for I/O and PHY, digital core.

29 GPI1

IN

General purpose input pin

30 RESET#

IN

Chip power up reset

4. Block Diagram

PAC7301/PAC7302 is a USB PC Camera SOC with enhanced image quality and sensitivity, internal regulators,

JPEG image compression, image processing schemed, control registers, on-chip SRAM for image data buffer and

USB controller. All register parameters are set by USB interface. And the JPEG compressed image data is

transmitted by USB 1.1 isochronous pipe.