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6.2.8. LVAL a-synchronous accumulation
With LS=1, the accumulation will start immediately after the trigger leading edge.
The exposure start delay will be 156 clk. pulses after the trigger. It is 3.9 µsec.
In EPS mode the exposure stops 0.5 L after the selected shutter time, (in number of LVAL).
In PWC mode the exposure stops 0.5 L after the trigger trailing edge.
A new trigger must not be applied before the previous frame is read out. (FVAL is low).
The minimum trigger interval should be longer than the exposure time + 1 FVAL+3 LVAL.
Important notes on using this mode.
In LVAL a-synchronous PWC mode there is no exposure jitter.
L VAL
Ext.Trig
0. 5L
Min.:2L
SUB
104ck
52ck
SG
Exposur e
Pe r i o d
Vi r t u a l SUB
Equi val ence
Pu l s e
Dat a- out del ay:
0.5L to 1.5L
Exposur e del ay:
156ck( 3. 9us)
FVAL
Speci f i ed Number of LVALs
by shutter set
Act ual Exposur e Per i od
DA TA OUT
OB OB
Fig. 22. LVAL a-synchronous accumulation in EPS mode
L VAL
Ext.Trig
0. 5L
SUB
104ck
52ck
SG
Exposur e
Pe r i o d
Vi r t u a l SUB
Equi val ence
Pu l se
Dat a- out del ay:
0. 5L t o 1. 5L
Exposure del ay:
156ck(3. 9us)
FVAL
Act ual Exposur e Per i od
DA TA OUT
OB OB
Fig. 22A. LVAL a-synchronous accumulation in PWC mode