Keithley 2002, User Manual

Page: 308 / 366

IEEE-488 Bus Overview
D-6
Figure D-3
Command codes
D
7
D
6
D
5
D
4
X 0 0 0
Command
X 0 0 1
Command
X 0 1 0
Primary
Address
X 0 1 1
Primary
Address
X 0 1 1
Primary
Address
X 0 1 1
Primary
Address
X 1 1
0
X 1 1 1
Bits
D
3 ↓
D
2 ↓
D
1 ↓
D
0 ↓
Column
→
Row
↓
0 (A)
0 (B)
1 (A)
1 (B)
2 (A)
2 (B)
3 (A)
3(B)
4 (A)
4 (B)
5 (A)
5 (B)
6 (A)
6 (B)
7 (A)
7 (B)
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
0 1 0 1 0 0 0 1 0 1 0 1 0 1 0 1
0 1 2 3 4 5 6 7 8 9
10
11
12 13 14 15
NUL
SOH
STX ETX
EOT
ENQ
ACK
BEL
BS
HT
LF
VT
FF
CR
SO
SI
GTL
SDC
PPC*
GET
TCT*
DLE
DC1 DC2 DC3 DC4
NAK
SYN
ETB
CAN
EM
SUB
ESC
FS
GS
RS
US
LLO DCL
PPU*
SPE
SPD
SP
!
“ # $
%
&
‘ ( )
• +
, - . /
0 1 2 3 4 5 6 7 8 9
10
11
12 13 14 15
0 1 2 3 4 5 6 7 8 9
: ;
< = >
?
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
UNL
@
A B C
D
E F
G H
I J
K
L
M N O
0 1 2 3 4 5 6 7 8 9
10
11
12 13 14 15
P
Q
R S T
U V
W
X Y Z
[
\
]
∩

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
UNT
a
b
c
d
e
f
g
h
i j
k
l
m
n o
p q
r s t
u v
w
x y z
{ : }
≅
DEL
ADDRESSED COMMAND
GROUP
(ACG)
UNIVERSAL
COMMAND
GROUP
(UCG)
LISTEN
ADDRESS
GROUP
(LAG)
TALK
ADDRESS
GROUP
(T
AG)
PRIMAR
Y
COMMAND
GROUP
(PCG)
SECONDAR
Y
COMMAND
GROUP
(SDC)
*PPC (P
ARALLEL
POLL
CONFIGURE) PPU (P
ARALLEL
POLL
UNCONFIGURE),
and TCT (T
AKE CONTROL) not implemented by Model 2002.
Note: D
0
= DIO1 ... D
7
= DIO8; X = Don’
t Care.