Measurement Computing Digital488/80A - Manual (Page 92)

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 0 0 0 1 0 1 0 0
GET Group Execute Trigger ($08) 0 0 0 0 1 0 0 0
GTL Go To Local ($01) 0 0 0 0 0 0 0 1
LAG Listen Address Group ($20-3F) 0 0 1 a d d r n
LLO Local Lock Out ($11) 0 0 0 1 0 0 0 1
MLA My Listen Address 0 0 1 a d d r n
MTA My Talk Address 0 1 0 a d d r n
PPC Parallel Poll Config 0 1 1 0 S P2 P1 P0
PPD Parallel Poll Disable ($07) 0 0 0 0 0 1 1 1
PPU Parallel Poll Unconfig ($15) 0 0 0 1 0 1 0 1
SCG Second. Cmd. Group ($60-7F) 0 1 1 c o m m d
SDC Selected Device Clear ($04) 0 0 0 0 0 1 0 0
SPD Serial Poll Disable ($19) 0 0 0 1 1 0 0 1
SPE Serial Poll Enable ($18) 0 0 0 1 1 0 0 0
TAG Talker Address Group ($40-5F) 0 1 0 a d d r n
TCT Take Control ($09) 0 0 0 0 1 0 0 1
UNL Unlisten ($3F) 0 0 1 1 1 1 1 1
UNT Untalk ($5F) 0 1 0 1 1 1 1 1
Hexadecimal & Decimal Values
Hexadecimal Value $80 $40 $20 $10 $08 $04 $02 $01
Decimal Value 128 064 032 016 008 004 002 001
86 Appendix B Digital488/80A User's Manual