PixArt Imaging Inc.

PAS005B

CMOS Image Sensor IC

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PixArt Imaging Inc.

DAC PGA lag one frame

Vsync

ny, ne

DAC

Gg,Cg

update

new ny, ne operate

new DAC, Gg, Cg

operate

Normally the readout of current frame will be exposed in the readout of the previous frame. To

easily program the sensor, one can send exposure registers(ny, ne), dac and gain registers(Gg, Cg)

followed by setting the “flag” register, the new updated DAC, Gg, Cg will operate 1 frame after new

updated ny, ne automatically by programming the “dac_pg_lag” register.

4.9 Power down

last row

LPF

New frame Dk0

last row readout

exp_frame_rst

reg_upd

ny_ena_clk

ny_clk

last row + 1

snap

Concurrent exposure:

ny: last_row+3 ~ LPF + 3

Sequential exposure:

ny: 0 ~ LPF + 3

CDS Power down

ASP Power down

Nov

row_addr

Power down is classified as DSC_pd, CDS_pd and ASP_pd.

DSC_pd is to disable the digital timing(column address, CDS timing) in redundant rows.

CDS_pd pulls T_cds_EnL to 1 in redundant rows.

ASP_pd is to close DAC, PGA, and ADC in redundant rows.