User manual

Chapter 4 Connecting Signals
NI 6034E/6035E/6036E User Manual 4-36 ni.com
Figure 4-30 shows the timing requirements for the GPCTR0_GATE signal.
Figure 4-30. GPCTR0_GATE Signal Timing in Edge-Detection Mode
GPCTR0_OUT Signal
This signal is available only as an output on the GPCTR0_OUT pin. The
GPCTR0_OUT signal reflects the terminal count (TC) of general-purpose
counter 0. You have two software-selectable output options—pulse on TC
and toggle output polarity on TC. The output polarity is software-selectable
for both options. This output is set to tri-state at startup. Figure 4-31 shows
the timing of the GPCTR0_OUT signal.
Note
When using external clocking mode with correlated DIO, this pin is used as an input
for the external clock.
Figure 4-31. GPCTR0_OUT Signal Timing
Rising-Edge
Polarity
Falling-Edge
Polarity
t
w
= 10 ns minimum
t
w
GPCTR0_SOURCE
GPCTR0_OUT
GPCTR0_OUT
(Toggle Output on TC)
(Pulse on TC)
TC
UM.book Page 36 Monday, May 14, 2001 10:32 AM