National Instruments NI PCI-6110 - Manual (Page 65)

Chapter 4 Connecting Signals
© National Instruments Corporation 4-35 NI PCI-6110/6111 User Manual
GPCTR1_OUT Signal
This signal is available only as an output on the GPCTR1_OUT pin.
The GPCTR1_OUT signal monitors the TC of general-purpose counter 1.
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 high-impedance at startup. Figure 4-32 shows
the timing requirements for GPCTR1_OUT.
Figure 4-32. GPCTR1_OUT Signal Timing
GPCTR1_UP_DOWN Signal
This signal can be externally input on the DIO7 pin and is not available as
an output on the I/O connector. General-purpose counter 1 counts down
when this pin is at a logic low and counts up at a logic high. This input can
be disabled so that software can control the up-down functionality and
leave the DIO7 pin free for general use.
Figure 4-33 shows the timing requirements for the GATE and SOURCE
input signals and the timing specifications for the NI PCI-6110/6111 OUT
output signals.
GPCTR1_SOURCE
GPCTR1_OUT
(Pulse on TC)
GPCTR1_OUT
(Toggle Output on TC)
TC