NOIV1SE2000A-QDC Datasheet, PDF (35/77 Pages) ON Semiconductor – VITA 2000 2.3 Megapixel 92 FPS Global Shutter CMOS Image Sensor

NOIV1SN2000A, NOIV2SN2000A
Kneepoint Configuration (Multiple Slope Reset Levels)
The kneepoint reset levels are configured by means of
DAC configurations in the image core. The dual slope
kneepoint is configured with the dac_ds configuration,
while the triple slope kneepoint is configured with the
dac_ts register setting. Both are located on address 41.
Multiple Slope Integration in Master Mode (Pipelined or
Triggered)
In master mode, the time stamps for the double and triple
slope resets are configured in a similar way as the exposure
time. They are enabled through the registers
dual_slope_enable and triple_slope_enable and their values
are defined by the registers exposure_ds and exposure_ts.
NOTE: Dual and triple slope sequences must start after
readout of the previous frame is fully completed.
Figure 26 shows the frame timing for pipelined master
mode with dual and triple slope integration and
fr_mode = ‘0’ (fr_length representing the reset length).
In triggered master mode, the start of integration is
initiated by a rising edge on trigger0, while the falling edge
does not have any relevance. Exposure duration and
dual/triple slope points are defined by the registers.
Figure 26. Multiple Slope Operation in Master Mode for fr_mode = ‘0’ (Pipelined)
Slave Mode
In slave mode, the register settings for integration control
are ignored. The user has full control through the trigger0,
trigger1 and trigger2 pins. A falling edge on trigger1
initiates the dual slope reset while a falling edge on trigger2
initiates the triple slope reset sequence. Rising edges on
trigger1 and trigger2 do not have any impact.
NOTE: Dual and triple slope sequences must start after
readout of the previous frame is fully completed.
Exposure State
trigger0
trigger1
trigger2
FOT Reset
(No effect on
rising edge)
Frame N
Integrating
FOT Integrating
Readout
Image Array Global Reset
FOT
DS
TS
FOT
= ROT
= Readout
Figure 27. Multiple Slope Operation in Slave Mode
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