Gpctr1_Up_Down Signal; Figure 4-34. Gpctr1_Out Signal Timing; Figure 4-35. Gpctr Timing Summary - National Instruments VXI-MIO Series User Manual

SOURCE
GATE
OUT
National Instruments Corporation
GPCTR1_SOURCE
GPCTR1_OUT
(Pulse on TC)
GPCTR1_OUT
(Toggle output on TC)

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 4-35
shows the timing requirements for the GATE and SOURCE input
signals and the timing specifications for the OUT output signals of your
VXI-MIO Series module.
V
IH
V
IL
t
gsu
V
IH
V
IL
V
OH
V
OL
Source Clock Period
Source Pulse Width
Gate Setup Time
Gate Hold Time
Gate Pulse Width
Output Delay Time

Figure 4-34. GPCTR1_OUT Signal Timing

t
sc
t
gw
t
out
t
sc
t
sp
t
gsu
t
gh
t
gw
t
out

Figure 4-35. GPCTR Timing Summary

4-43
Chapter 4 Signal Connections
TC
t t
sp sp
t
gh
50 ns minimum
23 ns minimum
10 ns minimum
0 ns minimum
10 ns minimum
80 ns maximum
VXI-MIO Series User Manual