PixArt Imaging Inc.

PAS005B

CMOS Image Sensor IC

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PixArt Imaging Inc.

Hsync.

x x x x

x x

x x

322 pixels 0ut

x x x x

line time = 480+4(x)+4(D)+322+4(x) = 848 pixclks

x x x

480 pixclks

Pixclk_a

322 pixels out

Note: "x" indicates don't care PXD[9:0] , "D" dark.

x

D D D D

D D D D

Fig .4.3.5.2-1. Inter-line timing (default)

Hsync.

x x x x

x x

x x

322 pixels 0ut

x x x x

line time = cov[10:0]+480+4(x)+4(D)+322+4(x) pixclks

x x x

cov[10:0]

+480

Pixclk_a

322 pixels out

Note: "x" indicates don't care PXD[9:0] , "D" indicates dark.

x

D D D D

D D D D

Fig 4.3.5.2-2 Inter-line timing (programmable)

Valid frame data (242 lines)

Dark

Hsync.

480

Pixclks

480

Pixclks

Frame time(min) (=242 lines)

Vsync.

B,G,B,G...

G,R,G,R...

Dark

Dark

Dark

B,G,B,G...

Fig 4.3.5.2-3 Inter-frame timing (default)

Valid frame data

(242 lines)

Hsync.

Pixclks

Frame time = lpf[14:0]+3 lines

Vsync.

0

Dark

1

Dark

0

Dark

Valid frame data

(242 lines)

1

Dark

Fig .4.3.5.2-4 Inter-frame timing (programmable)

4.4 Snapshot mode

Typically, the snapshot mode must work with the aid of an external mechnical shutter. PAS005 support two

types of snapshot mode to fit the different exposure time request.

Snapshot mode 1: register seq_exp=1

When the exposure time is longer than the mechanical shutter speed limitation, snapshot mode 1 is chosen.

The exposure period is now controlled by the mechanisms of shutter opening and close as shown in Fig. 4.

The mechanical shutter can be trigger by the clock edge of output signal Vsync and all pixels will be exposure