Chapter 3
Connecting the Signals
©
National Instruments Corporation
3-41
DAQPad-MIO-16XE-50 User Manual
Figure 3-32 shows the timing requirements for the GPCTR1_GATE signal.
Figure 3-32.
GPCTR1_GATE Signal Timing
GPCTR1_OUT Signal
This signal is available only as an output on GPCTR1_OUT. The
GPCTR1_OUT signal monitors the TC board 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 start up. Figure 3-33 shows
the timing requirements for the GPCTR1_OUT signal.
Figure 3-33.
GPCTR1_OUT Signal Timing
GPCTR1_UP_DOWN Signal
This signal can be externally input on the DIO7 signal and is not available
as an output on the DAQPad-TB-52. General-purpose counter 1 counts
down when this signal 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 signal free for general use.
Rising-Edge
Polarity
Falling-Edge
Polarity
t
w
= 10 ns minimum
t
w
GPCTR1_SOURCE
GPCTR1_OUT
GPCTR1_OUT
(Toggle Output on TC)
(Pulse on TC)
TC
