National Instruments VXI-MIO Series - Manual (Page 86)

Chapter 4 Signal Connections
VXI-MIO Series User Manual 4-40  National Instruments Corporation
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 signal is set to
input (High-Z) at startup. Figure 4-31 shows the timing of the
GPCTR0_OUT signal.
Figure 4-31. GPCTR0_OUT Signal Timing
GPCTR0_UP_DOWN Signal
This signal can be externally input 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.
Rising-edge
polarity
Falling-edge
polarity
t
w
t
w
= 10 ns minimum
GPCTR0_SOURCE
GPCTR0_OUT
GPCTR0_OUT
(Toggle output on TC)
(Pulse on TC)
TC