Keysight VXI Bus 75000 C Series User And Programming Manual page 49

Using the Handshake Modes
PARTial
The PARTial handshake makes use of both the CTL and FLG lines. The input and
output operations are described below.
INPUT
Keysight E1458A 96-Channel Digital I/O Module User Guide
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 peripheral holds the FLG line
READY for at least 250 nsecs and
then sets the FLG line BUSY to
indicate the data is valid.
5. The digital I/O module senses the
FLG line change to BUSY and latches
the data.
6. The digital I/O module then sets
the CTL line FALSE.
Using the Keysight E1458A Digital I/O Module
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
change, sets the FLG line to READY for
a minimum of 250 nsecs, latches the
data, and sets the FLG line to BUSY.
5. The digital I/O module senses the
change of the FLG line and sets CTL to
FALSE.
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