Keithley 2000, User Manual, Page: 266 / 280

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)
TA
LK
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 2000.
Note: D
0
= DIO1 ... D
7
= DIO8; X = Don’
t Care.
Figure E-3
Command
codes
E-12 IEEE-488 Bus Overview