PAC407BCA/PAC407BCW

CMOS Image Sensor IC

Version 1.7, 13 Sep

2004

PixArt Imaging Inc.

E-mail: fae_service@pixart.com.tw

7

Y0

4 8 16

32

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64

128

192

255

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Input Luminance

X

Figure 4.1 Gamma Correction curve

Power Down Mode

Because PAC407 is divided by two portions: Sensor and ASIC (ISP), software power down procedure

should be performed on both portions. The PAC407 supports 2 power-down modes:

Software power down

Setting register “ISP_EnH”=0 in ASIC and register “Sw_PwrDn”=1 in Sensor.

Hardware power down

Pull PWDN pin to high to power down the chip. The chip will go into standby state.

Reset Mode

The PAC407 can be reseted by setting registers or by pulling low RESET# pin. PAC407 supports 2 reset

modes:

Software reset

Setting register “Sw_Reset”=1 in Sensor and register “Software_Reset”=1 in ASIC to reset all the

2TM

IC

registers.

Hardware reset

Pulling RESET# pin to low to reset the entire chip.