
94 Appendix DAC488 User’s Manual
IEEE 488 Bus Commands
Bus State IEEE 488 Bus Command Data Transfer (DIO) Lines
(ATN is asserted “1”) 8 7 6 5 4 3 2 1
DCL
Device Clear
00010100
GET
Group Execute Trigger ($08)
00001000
GTL
Go To Local ($01)
00000001
LAG
Listen Address Group ($20-3F)
001addrn
LLO
Local Lock Out ($11)
00010001
MLA
My Listen Address
001addrn
MTA
My Talk Address
010addrn
PPC
Parallel Poll Config
0 1 1 0 S P2P1P0
PPD
Parallel Poll Disable ($07)
00000111
PPU
Parallel Poll Unconfig ($15)
00010101
SCG
Second. Cmd. Group ($60-7F)
011commd
SDC
Selected Device Clear ($04)
00000100
SPD
Serial Poll Disable ($19)
00011001
SPE
Serial Poll Enable ($18)
00011000
TAG
Talker Address Group ($40-5F)
010addrn
TCT
Take Control ($09)
00001001
UNL
Unlisten ($3F)
00111111
UNT
Untalk ($5F)
01011111
Hexadecimal & Decimal Values
Hexadecimal Value
$80 $40 $20 $10 $08 $04 $02 $01
Decimal Value 128 064 032 016 008 004 002 001
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