PixArt Imaging Inc.
PAS005B
CMOS Image Sensor IC
4.8 DAC & PGA lagging
DAC PGA lagoneframe
Vsync
new DAC,Gg,Cg
operate
ny,ne
DAC
new ny,neoperate
Gg,Cg
update
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
snap
Nov
lastrow
lastrow +1
lastrow readout
LPF
New frameDk0
row_addr
ny_ena_clk
reg_upd
Concurrent exposure:
ny:last_row+3~LPF+3
Sequential exposure:
ny:0~LPF+3
exp_frame_rst
ny_clk
CDSPowerdown
ASPPowerdown
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.
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PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
