Dalsa Piranha3, User Manual

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Piranha 3 User Manual
03-032-10216-02 DALSA
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Figure 7: Piranha3 Fixed (Programmed) Integration Timing with External EXSYNC
Table 10: Piranha3 Input and Output
Symbol Definition Min (ns)
twSYNC The minimum low width of the EXSYNC pulse when
not in SMART EXSYNC mode. 100
twSYNC
(SMART)
*
The minimum low width of the EXSYNC pulse when
in SMART EXSYNC modes to guarantee the
photosites are reset.
3,000
twSYNC_INT The minimum width of the high pulse when the
“SMART EXSYNC” feature is turned off 100
twSYNC_INT
(SMART)
*
Is the integration time when the “SMART EXSYNC”
feature is available and turned on. Note that the
minimum time is necessary to guarantee proper
operation.
3,000
tLINE PERIOD
(t
LP
)
The minimum and maximum line times made up of
tTransfer, tREADOUT plus tOVERHEAD to meet
specifications. 53,190 (12k)
106,382 (8k)
tTransfer The time from the reception of the falling edge of
EXSYNC to the rising edge of LVAL when pretrigger
is set to zero. Pretrigger reduces the number of clocks
to the rising edge of LVAL but doesn’t change the
time to the first valid pixel. If the fixed integration
time mode of operation is available and selected then
the integration time is added to the specified value. 3,725 ±25
twFixed Int. Fixed Integration Time mode of operation for variable
exsync frequency. 800
tREADOUT Is the number of pixels per tap times the readout clock
period. Pretrigger = 0. 38,400 (12k)
25,600 (8k)
tOVERHEAD Is the number of pixels that must elapse after the
falling edge of LVAL before the EXSYNC signal can be
asserted. This time is used to clamp the internal
analog electronics 425±25
thPR Applies when the PRIN exposure control feature is
enabled . The PRIN signal must be held a minimum
time after the EXSYNC falling edge to avoid losing the Don’t care