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Philips PM2519 - Page 41

Philips PM2519
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2-25
Transmitting
After
the
microcomputer
has
received
MTA
(or
in
Talk-only
mode)
as
described
above,
the
interface
becomes
talker.
This
means
that
D604
and
D603
are
now
transmitters.
The
bytes
on
PO
are
now
data
for
the
controller.
If
the
interface
becomes
talker
it
makes
P13
low.
The
GPIB
device
D602
is
switched
to
another
configuration.
Outputs:
DAV,
SRQ,
EO!
D602
Inputs:
:
NDAC,
NRFD,
REN,
ATN,
IFC
The
PM
2519/51
is
now
handshaking
so
that
the
bytes
are
sent
to
a
controller
or
another
device.
At
the
end
of
the
databytes
the
PM
2519/51
generates
an
EOI.
The
interface
will
remain
talker
until
the
Listener
address
is
again
on
the
bus
or
after
an
IFC
command
connected
to
the
interrupt
system
of
the
interface.

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