Advantech PC-LabCard PCI-1784 Manual do Utilizador descarregar pdf (Página 61)

D.6 Mode F waveform

Non-Retriggerable One-Shot

Mode F provides a non-retriggerable one-shot timing function. The

counter must be armed before it will function. Application of a Gate

edge to the armed counter will enable counting. When the counter

reaches TC, it will reload itself from the Load register. The counter will

then stop counting, awaiting a new Gate edge.

Note that unlike Mode C, a new ARM command is not needed after TC,

only a new Gate edge. After application of a triggering Gate edge, the

Gate input is disregard until TC.

SOURCE

COUNT

VALUE

TC OUTPUT

TC TOGGLED

OUTPUT

GATE

L-1 L-2 2 0

Mode F Waveforms

X L 1 L

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 70 71

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Advantech PC-LabCard PCI-1784 Manual do Utilizador Página 61