Racal Instruments 1994 Service Manual page 108

4.2.3
GPEB Handshake
4. 2.
3.1
The
handshake sequence
is
the
process by
which each
data byte
is
transferred
from
the source
to
the acceptor.
4. 2. 3. 2
Refer
to
Figure
4.3.
It
shows
the sequential relationship
between
the
DAV,
NRFD,
and
NDAC
lines
used
to
transfer
data
bytes.
Figure
4.4
shows
the handshake
flow
chart.
1ST
DATA TRANSFER CYCLE
2ND
DATATRANSFER
CYCLE
Figure 4.3 -
Handshake Sequence