Trigger and Integration Time Controlled by One Input The integration period starts immediately after the falling edge of TRIG1 input signal, stops immediately after the rising edge of TRIG1 input signal, and is immediately followed by a readout period. The readout time depends on pixel number and pixel rate. Figure 8-3. Timing Diagram 8.1.4 Trigger and Integration Time Controlled by Two Inputs TRIG2 rising edge start the integration period. TRIG1 rising edge stop the integration period. This period is immediately followed by a readout period. tt Integration period stop to read-out start delay – 1 μs – ts Integration period stop to TRIG1 rising set-up time 4 μs – – th TRIG1 hold time (pulse high duration) 1 μs – – Table 8-2. Triggered Mode with Integration Time Setting (Continued) Label Description Min Typ Max Integration N Integration N+1 Readout N TRIG1 td ts th tt ti Table 8-3. Trigger and Integration Time Controlled by One Input
Table 8-4. Trigger and Integration Time Controlled by Two Inputs Label Description Min Typ Max ti Integration time duration 5 μs – – td1 TRIG2 rising to integration period start delay – 100 ns – td2 TRIG1 rising to integration period stop delay – 1.3 μs – tt Integration period stop to read-out start delay – 1 μs – th TRIG1 and TRG2 hold time (pulse high duration) 1 μs – – td1 td2 ti tt Integration N Integration N+1 Readout N-1 Readout N
Output Data Timing This timing corresponds to the input data of the Camera Link interface. The camera output data are not detailed here because fully compliant with the Camera Link standard (serial high-speed interface). Table 8-4. Trigger and Integration Time Controlled by Two Inputs Label Description Min Typ Max ti Integration time duration 5 μs – – td1 TRIG2 rising to integration period start delay – 100 ns – td2 TRIG1 rising to integration period stop delay – 1.3 μs – tt Integration period stop to read-out start delay – 1 μs – th TRIG1 and TRG2 hold time (pulse high duration) 1 μs – – td1 td2 ti tt Integration N Integration N+1 Readout N-1 Readout N TRIG1 TRIG2 Table 8-5. Output Data Timing Label Description Min Typ Max tp Input falling edge to output clock propagation delay – 7 ns – td STROBE to synchronized signals delay -5 ns – +5 ns
CLK_IN input frequency must be in the range 5 to 60 MHz. Out of this range, the performances may be decreased. In case of multi-cameras synchronization (means more than one camera on one acquisition board):
? the "master" camera will provide DATA, STROBE and LVAL signals to the acquisition board. The others will only provide DATA.
? the external clock CLK_IN must be input on each cameras to guaranty perfect data synchronization
? the trigger(s) input (TRIG1 and/or TRIG2) must be input on each cameras. It is recommended to synchronize the rising edge of these signals on the CLK_IN falling edge. ? cables must be balanced between each cameras (same quality, same length) to ensure perfect cameras synchronization.
? the CLK_IN frequency must be equal to the two CCD register frequency. It means that the user shall use either H=2 (2 taps at CLK_IN data rate) or H=10 (1 tap at 2xCLK_IN data rate). Using H=1 clock mode will provide LVAL jitter on the "slave" camera.
? Only "triggered and integration time controlled" (M=3 or M=4) can be used. These modes ensure perfect readout phase starting for each cameras.
