Chapter 4
Signal Connections
©
National Instruments Corporation
4-19
6711/6713/6715 User Manual
Figure 4-13.
GPCTR0_OUT Signal Timing
GPCTR0_UP_DOWN Signal
You can externally input this signal on the DIO6 pin and is not available as
an output on the I/O connector. The general-purpose counter 0 will count
down when this pin is at a logic low and count up when it is at a logic high.
You can disable this input so that software can control the up-down
functionality and leave the DIO6 pin free for general use.
GPCTR1_SOURCE Signal
Any PFI pin can externally input the GPCTR1_SOURCE signal, which is
available as an output on the PFI3/GPCTR1_SOURCE pin.
As an input, the GPCTR1_SOURCE signal is configured in the
edge-detection mode. You can select any PFI pin as the source for
GPCTR1_SOURCE and configure the polarity selection for either rising or
falling edge.
As an output, the GPCTR1_SOURCE monitors the actual clock connected
to general-purpose counter 1. This is true even if the source clock is
externally generated by another PFI. This output is set to tri-state at startup.
GPCTR0_SOURCE
GPCTR0_OUT
GPCTR0_OUT
(Toggle output on TC)
(Pulse on TC)
TC
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