NOIL2SM1300A
Programming the Exposure Time
In master mode, the exposure time is configured in two
distinct methods (controlled by register seqmode3[6]):
? # lines: Obvious, changing signals that control
integration time. They are always changed during ROT
Table 13 lists the user programmable timer settings and
how they are interpreted by the hardware.
Table 13. USER PROGRAMMABLE TIMER SETTINGS
Setting Granularity
to avoid any image artefacts.
? # clock cycles: Must be multiplied by
(2**seqmode4[3:0]). When the counter expires,
changes are put into effect immediately. Asserting the
configuration signal (seqmode3[7]) forces delaying
signal updates until the next ROT.
reg_res_length
reg_tint_timer
reg_tint_ds_timer
reg_tint_ts_timer
res_dsts_length
reg_rot_timer
reg_fot_timer
reg_sel_pre_timer
reg_precharge_timer
reg_sample_timer
reg_vmem_timer
reg_delayed_rdt_timer
Lines/cycles
Lines/cycles
Lines/cycles
Lines/cycles
Lines/cycles
clock cycles
clock cycles
clock cycles
clock cycles
clock cycles
clock cycles
Lines/cycles
Note that the seqmode3[7] can also be used to sync the user signals in slave mode. The behavior is exactly the same.
Master Mode
In master mode the reset and exposure time is written in registers.
Figure 14. Integration and Image Readout in Master Mode
Ensure that the added value of the registers res_length and
tint_timer always exceeds the number of lines that are read
out. This is because the sequencer samples a new image after
integration is complete, without checking if image readout
is finished. Enlarging res_length to accommodate for this
has no impact on image capture.
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