Timer Usage; Timer Status; Timer Active, -Start And -End Signal - Photon Focus MV0 CMOSIS Series User Manual

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Figure 5.2: Timer Structure

5.2.1 Timer Usage

Timer delay and timer duration value needs to be configured accordingly. When a timer trigger
source is selected the timer is waiting for a trigger signal. Once this trigger signal has been
received, the timer starts first with the timer delay period, if the timer delay value is > 0, and
counts then for the specified timer duration.
When the timer trigger source is set to off (see Section 5.2.5), a software timer
reset command starts the timer immediately (see Section 5.2.4).
The current timer value can be read via software. A start value can also be set, which means,
that the timer starts from this configured value instead from zero.

5.2.2 Timer Status

The timer has different states, which depends on the configuration and usage. The current
state can be read out by the register TimerStatus. The following list shows the available states:
Timer Idle Timer is idle, and trigger source selection is set to off.
Timer Trigger Wait Timer is waiting for a timer trigger signal.
Timer Delay Timer is in timer delay count period.
Timer Active Time is active and counts for the specified timer duration.
Timer Completed Timer completed indicates, that the timer reached the timer duration count.
The timer remains in this state, until a new timer trigger event has been received, or the
timer is reset by a software command (see Section 5.2.4)

5.2.3 Timer Active, -Start and -End Signal

Timer Active An asserted timer active signal indicates, that the timer has started counting the
configured duration period. The timer active signal is internally routed to the I/O control
block and can there be selected for output on the physical output line or on one of the
available leds.
Timer Start The timer start is an event, which is generated, when the timer starts with the
timer duration period.
Timer End The timer end is an event, which is generated, when the timer arrives its configured
timer duration value.
The timer start and end event signals can be used to trigger other blocks, like counter, timer,
acquisition, frame or exposure control.
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5.2 Timer
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