Keysight VXI Bus 75000 C Series User And Programming Manual page 50

Using the Keysight E1458A Digital I/O Module
STRobe
The STRobe handshake makes use of the CTL line, but not the FLG line. The
input and output operations are described below.
INPUT
1. The digital I/O module sets the I/O
line HIGH.
2. The digital I/O module sets CTL
TRUE.
3. The peripheral senses the CTL line
and sets the data lines.
4. The digital I/O module waits the
programmed time delay, Td, after
setting CTL TRUE and then latches
the data.
5. The digital I/O module then
returns CTL to FALSE.
NONE
When handshake is set to NONE, no control or flag lines are used. The Keysight
E1458A Digital I/O Module will input data or output data when programmed. The
I/O line is set for output (LOW) before data is output. Data lines programmed for
output will remain as output until another command is received.
Handshake NONE can be combined with the SCPI commands
MEASure:DIGital:FLAGn and [SOURce:]DIGital:CONTroln to create custom
handshakes.
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OUTPUT
1. The digital I/O module sets the I/O
line LOW.
2. The digital I/O module places the
data on the data lines.
3. After waiting the programmed delay
time, Td, the digital I/O module sets
CTL to TRUE.
4. The peripheral senses the CTL line
and latches the data.
5. After waiting the programmed delay
time, Td, the digital I/O module sets
CTL to FALSE.
Keysight E1458A 96-Channel Digital I/O Module User Guide
Using the Handshake Modes