CYIS1SM0250-AA
Document Number: 38-05713 Rev. *B
Page 12 of 24
Figure 10. Basic Readout Timing
SYNC_YR is not identical to as SYNC_YL. SYNC_YR is used
in case of electronic shutter operation. The CLK_YR is driven
identically as CLK_YL, but the SYNC_YR pulse leads the
SYNC_YL pulse by a certain number of rows. This lead time
is the effective integration (electronic shutter ~) time. Relative
to the row timing, both SYNC pulses are given at the same
time position, once for each frame, but during different rows.
SYNC_YL is pulsed when the first row is read out and
SYNC_YR is pulsed for the electronic shutter to start for this
first row. CAL is pulsed on the first row too, 2
µs later than
SYNC_YL.
The minimal idle time is 1.4
µs (before starting reading pixels).
However, do not read out pixels during the complete row initial-
ization process (in between the rising edge on S and the falling
edge on L/R). In this case, the total idle time is minimal. This
timing assumes that the Y start register was loaded in
advance, which can occur at any time but before the pulse on
SYNC_YL or SYNC_YR.
T13
T10
T2
T9
T16
T15
T17
T14
T12
T1
T3
T7
T4
T6
T4
T11
T5
T8
Time Available for Read Out of Row Y
Row Blanking Time
Row
Y-1
SYNC_YL
SYNC_YR
CAL
Row Start
Address
LD_Y
CLK_YL
CLK_YR
S
RESET
R
L/R
Table 7. Readout Timing Specifications
Symbol
Min
Typ
Description
T1
1.8
µs
Delay between selection of new row by falling edge on CLK_YL and falling edge on S.
Minimal value. Normally, CLK_YR is low already at the end of the previous sequence.
T2
1.8
µs
Delay between selection of new a row by SYNC_YL and falling edge on S.
T3
0.4
µs
Duration of S and R pulse.
T4
0.1
µs
Duration of RESET pulse.
T5
T4 + 40 ns
0.3
µs
L/R pulse must overlap second RESET pulse at both sides.
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