Appendix a, Ieee 488 bus & serial bus lines, Es…… 93 – Measurement Computing DAC488 v.1 User Manual
Page 99
DAC488 User’s Manual
Appendix 93
Appendix
A
IEEE 488 Bus & Serial Bus Lines…… 93
IEEE 488 Bus Commands…… 94
ASCII Codes…… 95
ASCII Code Summary…… 95
Decimal Values 00 to 63 - ACG, UCG & LAG…… 95
Decimal Values 64 to 127 - TAG & SCG…… 96
ASCII Code Details…… 97
Decimal Values 00 to 31 - ACG & UCG Characteristics…… 97
Decimal Values 00 to 31 - ACG & UCG Descriptions…… 98
Decimal Values 32 to 63 - LAG…… 99
Decimal Values 64 to 95 - TAG…… 100
Decimal Values 96 to 127 - SCG…… 101
IEEE 488 Bus & Serial Bus Lines
Bus State
Bus Line
Data Transfer (DIO) Lines
8
7
6
5
4
3
2
1
Bus Management Lines
IFC
Interface Clear
REN
Remote Enable
IEEE 488 Interface: Bus Management Lines
ATN
Attention ($04)
0
0
0
0
0
1
0
0
EOI
End-Or-Identify ($80)
1
0
0
0
0
0
0
0
SRQ
Service Request ($40)
0
1
0
0
0
0
0
0
IEEE 488 Interface: Handshake Lines
DAV
Data Valid ($08)
0
0
0
0
1
0
0
0
NDAC
Not Data Accepted ($10)
0
0
0
1
0
0
0
0
NRFD
Not Ready For Data ($20)
0
0
1
0
0
0
0
0
Serial Interface: Bus Management Lines
DTR
Data Terminal Ready ($02)
0
0
0
0
0
0
1
0
RI
Ring Indicator ($10)
0
0
0
1
0
0
0
0
RTS
Request To Send ($01)
0
0
0
0
0
0
0
1
Serial Interface: Handshake Lines
CTS
Clear To Send ($04)
0
0
0
0
0
1
0
0
DCD
Data Carrier Detect ($08)
0
0
0
0
1
0
0
0
DSR
Data Set Ready ($20)
0
0
1
0
0
0
0
0
Hexadecimal & Decimal Values
Hexadecimal Value
$80
$40
$20
$10
$08
$04
$02
$01
Decimal Value
128
064
032
016
008
004
002
001