A-6
A1
TABLE A-1 IEEE 488 COMMAND AND ADDRESS MESSAGES
ASCII NUL SOH STX ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO
SI
0 1 2 3 4 5 6 7 8 9 A B C D E F
ASCII -- IEEE 488 BUS MESSAGES (COMMANDS
AND
ADDRESS) HEX CODES
Notes:
1. Device
Address messages shown in decimal
2. Message codes are
:
3.
ATN ofAA
f, Bus data is
ASCII;
ATN on, Bus data is an IEEE MSG.AA
DCL
-- Devices Clear
DCLDCL GET
-- Device
GETGET
T
rigge
r
GTL
-- Go to Local
GTLGTL
LLO -- Local Lockout PPC -- Parallel Poll Configure PPU -- Parallel Poll Unconfigure
SDC -- Selected Device Clear SPD -- Serial Poll Disable SPE -- Serial Poll Enable
ADDRESSED COMMAND
GROUP
UNIVERSAL COMMAND
GROUP
LISTEN
ADDRESS GROUP
TALK TT
ADDRESS GROUP
SECONDAR
Y COMMANDYY
GROUP
PRIMAR
Y COMMAND GROUPYY
(PCG)
LSD
MSD
MSG
GTL
SDC PPC
GET TCT
ASCII DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US
MSG
LLO
DCL PPU
SPE SPD
ASCII SP
! " # $ % & ' ( ) * + , - . /
MSG1
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
ASCII
0 1 2 3 4 5 6 7 8 9 : ; < = > ?
MSG1
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 UNL
ASCII
@ A B C D E F G H I J K L M N O
ASCII
P Q R S T U V W X Y Z [ \ ] ^
MSG1
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
MSG1
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 UNT
ASCII
` a b c d e f g h i j k l m n o
MSG
ASCII
pp q r s t u v w x y z ( | ) ~ DEL
MSG
0
1
2
3
4
5
6
7
q
g
y
j
4
5
0
1
_
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Summary of Contents for N4865A
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