Gpctr1_Up_Down Signal - National Instruments NI 6115/6120 User Manual

GPCTR1_SOURCE
GPCTR1_OUT
(Pulse on TC)
GPCTR1_OUT
(Toggle output on TC)
V
IH
SOURCE
V
IL
V
IH
GATE
V
IL
V
OH
OUT
V
OL
© National Instruments Corporation
Figure 4-35 shows the timing requirements for GPCTR1_OUT.
Figure 4-35. GPCTR1_OUT Signal Timing

GPCTR1_UP_DOWN Signal

This signal can be received as an 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 4-36 shows the timing
requirements for the GATE and SOURCE input signals and the timing
specifications for the OUT output signals.
t
gsu
t
out
Source Clock Period
Source Pulse Width
Gate Setup Time
Gate Hold Time
Gate Pulse Width
Output Delay Time
Figure 4-36. GPCTR Timing Summary
TC
t t
sc sp
t
gh
t
gw
t
50 ns minimum
sc
t
23 ns minimum
sp
t
10 ns minimum
gsu
t
0 ns minimum
gh
t
10 ns minimum
gw
t
80 ns maximum
out
4-37
Chapter 4 Connecting Signals
t
sp
NI 6115/6120 User Manual