Symbol
NRFO"
T/R2
EOI"
SRO"
REN"
ATN"
8293
1/0
Pin No. Function
1/0
17
Not
Ready
For Data;
IEEE
GPIB
bus handshake control
line.
When
an
input,
it
is a TTL
compatible Schmitt·trigger.
When
an
output,
it
is
an
open·
collector
driver with a
48
mA
current sinking capability.
2 Transmit receive
2;
direction
control for
EOL
If T/R2 is high,
EOI" is sending. Input Is
TIL
compatible.
1/0
3
End
or Identify; processor
GPIB bus control line; is used
by
a talker
by
indicate the end
of a
multiple byte transfer.
This pin is
TIL
compatible.
1/0
15
End
or Identify;
IEEE
GPIB
bus
control line; is used
by
a talker
to
indicate the
end
of a multi-
ple
byte transfer. This pin is a
three-state
(push-pull) driver
capable of sinking
48
mA and
a
TIL
compatible receiver
with
hysteresiS.
8
o 16
o 6
13
o 4
19
Service Request; processor
GPIB bus control line; used by
a device to indicate the
need
for service
and
to request
an
interruption of the current
se-
quence of events
on
the GPIB.
It
is a
TIL
compatible
input
Service Request;
IEEE
GPIB
bus control line; it is
an
oPen
collector driver capable of
sinking
48
mAo
Remote Enable; processor
GPIB bus control line; used
by
a controller
(in
conjunction
with
other
messages)
to
select between two alternate
sources of device program-
ming data (remote
·or
local
control).
This output is
TIL
compatible.
Remote Enable;
IEEE
GPIB
bus control line. This input is
a
TIL
compatible Schmitt-
trigger.
Attention; processor
GPIB
bus control line; used by the
8291
to
determine how data
on
the 010 signal lines are to
be
interpreted. This
Is
a
TIL
compatible output.
Attention;
IEEE
GPIB bus con-
trol line;
this input is a
TIL
compatible Schmitt·trlgger.
Symbol
1/0
Pin
No.
Function
o 5
IFC"
12
Interface Clear; processor
GPIB bus control line; used by
a
controller
to
place the inter-
face system into a known
quiescent state.
It is a
TIL
compatible output.
Interface Clear;
IEEE
GPIB
bus control line. This input is
a
TIL
compatible Schmitt-
trigger.
T/Ffl01
T/RI02
11
23
Transmit receive General
10;
direction control for the two
spare transceivers.
Input is
TIL
compatible.
1/0
24
1/0
25
General
10;
this is the
TIL
side of the two spare tran-
sceivers. These pins are TTL
compatible.
G101"
G102"
1/0
21
1/0
22
General
10;
these are spare
three-state
(push-pull) driversl
Schmitt-trigger receivers. The
drivers can sink
48
mAo
MODEl
DAV
1-------1
T/ih
010,
/------H
010,
/------H
010,
/------H
I!i!l4
I------H
rno,
/------H
iiiOs
I------H
Dill,
I------H
~
1------+-1
Afiij
EOi
Figura
4.
TalkerlListener
Data
Configuration
9-111
OPTA
OPT"
