PYTHON25K Datasheet, PDF (23/87 Pages) ON Semiconductor – PYTHON 25K/16K/12K/10K Global Shutter CMOS Image Sensors

NOIP1SN025KA, NOIP1SN016KA, NOIP1SN012KA, NOIP1SN010KA
Table 17. ALTERNATE SYNC CONFIGURATIONS
Group
Affected Registers
Description
sync_black_lines
black_lines
Update of black line configuration is not synchronized at start of frame when ‘0’. The
sensor continues with its previous configurations.
sync_exposure
mult_timer
fr_length
exposure
Update of exposure configurations is not synchronized at start of frame when ‘0’. The
sensor continues with its previous configurations.
sync_gain
mux_gainsw
afe_gain
Update of gain configurations is not synchronized at start of frame when ‘0’. The
sensor continues with its previous configurations.
sync_roi
roi_active0[15:0]
roi_active1[15:0]
subsampling
binning
Update of active ROI configurations is not synchronized at start of frame when ‘0’. The
sensor continues with its previous configurations.
Note: The window configurations themselves are not frozen. Re-configuration of
active windows is not gated by this setting.
Window Configuration
Global Shutter Mode
Up to 32 windows can be defined in global shutter mode
(pipelined or triggered). The windows are defined by
registers 256 to 351. Each window can be activated or
deactivated separately using registers 195 and 196. It is
possible to reconfigure the inactive windows while
acquiring images. Switching between predefined windows
is achieved by activation of the respective windows. This
way a minimum number of registers need to be uploaded
when it is necessary to switch between two or more sets of
windows. As an example of this, scanning the scene at
higher frame rates using multiple windows and switching to
full frame capture when the object is tracked. Switching
between the two modes only requires an upload of one (if the
total number of windows is smaller than 17) or two (if more
than 16 windows are defined) registers.
Black Calibration
The sensor automatically calibrates the black level for
each frame. Therefore, the device generates a configurable
number of electrical black lines at the start of each frame.
The desired black level in the resulting output interface can
be configured and is not necessarily targeted to ‘0’.
Configuring the target to a higher level yields some
information on the left side of the black level distribution,
while the other end of the distribution tail is clipped to ‘0’
when setting the black level target to ‘0’.
The black level is calibrated for the 64 columns contained
in one kernel. This implies 64 black level offsets are
generated and applied to the corresponding columns.
Configurable parameters for the black-level algorithm are
listed in Table 18.
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