USB5841 Data Acquisition
MODE 1 Hardware retriggerable one-shot
OUT will be initially high. OUT will go low on the CLK pulse following a trigger to begin the one-shot pulse, and will
remain low until the Counter reaches zero.
OUT will then go high and remain high until the CLK pulse after the next trigger.
After writing the Control Word and initial count, the Counter is armed. A trigger results in loading the Counter and
setting OUT low on the next CLK pulse, thus starting the one-shot pulse. An initial count of N will result in a one-shot
pulse N CLK cycles in duration. The one-shout is retriggerable, hence OUT will remain low for N CLK pulses after
any trigger. The one-shot pulse can be repeated without rewriting the same count into the counter. GATE has no effect
on OUT.
If a new count is written to the Counter during a one-shot pulse, the current one-shot is not affected unless the counter
is retriggered. In that case, the Counter is loaded with the new count and the one-shot pulse continues until the new
count expires.
Figure 5.2 Mode 1
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