National Instruments 3.21E+04 用户手册
Chapter 4 Signal Connections
AT-MIO/AI E Series User Manual
4-50
National Instruments Corporation
Figure 4-35 shows the timing requirements for the GPCTR1_GATE
signal.
signal.
Figure 4-35. GPCTR1_GATE Signal Timing in Edge-Detection Mode
GPCTR1_OUT Signal
This signal is available only as an output on the GPCTR1_OUT pin.
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 tri-state at startup.
Figure 4-36 shows the timing requirements for the GPCTR1_OUT
signal.
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 tri-state at startup.
Figure 4-36 shows the timing requirements for the GPCTR1_OUT
signal.
Figure 4-36. GPCTR1_OUT Signal Timing
Rising-edge
polarity
polarity
Falling-edge
polarity
polarity
t
w
t
w
= 10 ns minimum
GPCTR1_SOURCE
GPCTR1_OUT
GPCTR1_OUT
(Toggle output on TC)
(Pulse on TC)
TC