ADLINK PXI-2022 - Manual (Page 55)

Function Block and Operation Theory 47
Mode 6: Re-triggered Single Pulse Generation
This mode is similar to mode5 except that the counter gener-
ates a pulse following every active edge of GPTC_GATE. After
the software-start, every active GPTC_GATE edge triggers a
single pulse with programmable delay and pulse-width. Any
GPTC_GATE triggers that occur when the prior pulse is not
completed would be ignored. Figure 4-21 illustrates the gener-
ation of two pulses with a pulse delay of two and a pulse-width
of four.
Figure 4-21: Mode 6 Operation
Mode 7: Single Triggered Continuous Pulse Generation
This mode is similar to mode5 except that the counter gener-
ates conti-nuous periodic pulses with programmable pulse
interval and pulse-width following the first active edge of
GPTC_GATE. Once the first GPTC_GATE edge triggers the
counter, GPTC_GATE takes no effect until the soft-ware-start is
re-executed. Figure 4-22 illustrates the generation of two
pulses with a pulse delay of four and a pulse-width of three.
Figure 4-22: Mode 7 Operation
2 2 1 0 3 2 1 0 2 2 1 0 3 2 1 0 2 2
G a t e
C L K
C o u n t v a l u e
O U T
S o f t w a r e s t a r t I g n o r e d
4 4 4 3 2 1 0 2 1
S o f t w a r e s t a r t
0 3 2 1 0 2 1 0 3 2
G a t e
C L K
C o u n t v a l u e
O U T