8293
~[Q)W~OO©I§
OOOIF@rrulMl~lf'O@OO
PIN DESCRIPTION
Symbo.
110
Pin No;
Function
Symbol
110
Pin No. Function
EOI
I/O
3
End
or Identify; this pin
indio
BUS1-
I/O
12,13,
These are the
IEEE-488
bus
cates the end of a multiple
BUS9
1S·19,
interface
driver/rece!vers.
byte .transfer or,
In
conjunc·
21,22
Using the mode select pins,
tion with ATN, addresses the
they can
be
configured .dlffer·
device during a polling
se·
ently to allow direct connec·
quence.
It connects to the
tions between the
8291
GPIB
8291
and is switched between
Talker/Listener and the
8292
transmit and receive
by
T/R2.
GPIB Controller.
. This pin is TTL compatible.
OATA1-
I/O
5·11,
These are the pins
to
be
con·
ATN
0 4
Attention; this pin is used by
OATA10
23-2S
nected to the
8291
and
8292
to
the
8291
to
monitor the GPIB'
interface with the
GPIB
bus.
ATN
control line. It specifies
Their
use is programmed by
how data on the
010 lines is to
the
two mode select pins,
be
interpreted. This output is
OPTA
and
OPTB.
All these
TTL compatible.
pins
are TTL compatible.
o
PTA
27
These two pins are
to
control
T/R1
Transmit receive
1;
this pin
OPTB
I
26
the function of the
8293.
A
controls the
direction
for
truth table of how this
pro-
NOAC,
NAFO,
OAV,
and 0101-
grams the various modes is in
0108. Input is TTL compatible.
Table
1.
T/R2
2 Transmit receive
2;
this pin
Vee
P.S.
28
Positive power supply
(SV
controls the direction for
EOL
± 10%).
Input
is TTL compatible.
GNO
P.S.
14,20 Circuit ground potential.
Table
1.
8293
Mode Selection Pin Mapping
IEEE
Implementation Name
Pin Name
Pin
No.
Mode 0 Mode 1 Mode 2 Mode 3
OPTA
27
0 1 0
1
OPTB
26
0 0
1 1
OATA1
S
IFC
0108
n=c
0108
BUS1
12
IFC'
0108'
IFC'
OIOS'
OATA2
6
AEN
0107
AEN
0107
BUS2
13
AEN' 0107' AEN'
0107'
OATA3
7
NC
0106 EOl2 0106
BUS3
1S
EOI'
0106'
EOI'
0106'
OATA4
8
SAO
OIOS
SAO
0105
BUS4
16
SAO'
OIOS'
SAO'
OIOS'
OATAS
9
NAFO
0104
NAFO
0104
BUSS
17
NAFO'
0104'
NAFO'
0104'
OATA6
10
~
~
NOAC
0103
BUS6
18
NOAC' 0103' NOAC'
0103'
OATA7
11
T/R101
NC
ATNI ATNO
OATA8
23
T/R102
0102 ATNO
0102
BUS7
19
ATN'
0102'
ATN'
0102'
OATA9
24
G101
OAV
CIC
OAV
BUS8
.
21
G101' OAV'
CLTH OAV'
OATA10
2S
GI02
0101
IFCL
0101
BUS9
22
G102'
0101'
SYC
0101'
T/R1
1
T/R1
T/R1 TfR1
TlFh
T/R2
2 T/R2
NC
T/R2
IFCL
EOI
3
EOI
EOI
mr
EOI
ATN
4
ATN
Aiiil Am'
ATN
'Note:
These pins are the IEEE-488 bus non·lnvertlng driver/receivers. They Include all the bus terminations required by the Standard and may be
connected directly to the
GPIB bus connector.
9-109
