PixArt Imaging Inc.

PAS005B

CMOS Image Sensor IC

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PixArt Imaging Inc.

4.10 Reset management

There are five kinds of reset: “pu”, “csb”, “sfpd”, “sfrst”, “sync”. “pu” is the most strong reset. It reset full chip.

“csb” reset the full chip, but retain the register setting. “sfpd” reset the sensor core, but I2C interface is live.

“sfrst” is an register signal. Every time it is programmed to “1”, all the I2C registers are reset. After that, it will

be reset to zero. “sync” reset the sensor core timing. To avoid the recovering time problem, clock oscillating is

designed to start a little time after “pu”, “csb” and “sfpd” reset is released.

I2C control

sfrst

I2C Registers

Digital Core

CSB

PU

sfpd

Sync

(level signal)

A

B

D

Analog

Processing

Clock Reset::

I2C_sam : PU, CSB

ck12, pxck : PU, CSB, sfpd

Reset

C = A | sfpd