Omega Engineering OMB-CHARTSCAN 1400, Руководство пользователя

Страница: 256 / 273

ChartScan User’s Manual,
11-97
E-1
Appendix E
Bus States, Bus Lines, and Data Transfer Aspects
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 (&H04) 0 0 0 0 0 1 0 0
EOI
End-Or-Identify (&H80) 1 0 0 0 0 0 0 0
SRQ
Service Request (&H40) 0 1 0 0 0 0 0 0
IEEE 488 Interface: Handshake Lines
DAV
Data Valid (&H08) 0 0 0 0 1 0 0 0
NDAC
Not Data Accepted (&H10) 0 0 0 1 0 0 0 0
NRFD
Not Ready For Data (&H20) 0 0 1 0 0 0 0 0
Serial Interface: Bus Management Lines
DTR
Data Terminal Ready (&H02) 0 0 0 0 0 0 1 0
RI
Ring Indicator (&H10) 0 0 0 1 0 0 0 0
RTS
Request To Send (&H01) 0 0 0 0 0 0 0 1
Serial Interface: Handshake Lines
CTS
Clear To Send (&H04) 0 0 0 0 0 1 0 0
DCD
Data Carrier Detect (&H08) 0 0 0 0 1 0 0 0
DSR
Data Set Ready (&H20) 0 0 1 0 0 0 0 0
Hexadecimal & Decimal Values
Hex Value (QuickBASIC) &H80 &H40 &H20 &H10 &H08 &H04 &H02 &H01
Decimal Value 128 64 32 16 8 4 2 1
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 (&H08) 0 0 0 0 1 0 0 0
GTL
Go To Local (&H01) 0 0 0 0 0 0 0 1
LAG
Listen Address Group (&H20-3F) 0 0 1 a d d r n
LLO
Local Lock Out (&H11) 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 (&H07) 0 0 0 0 0 1 1 1
PPU
Parallel Poll Unconfig (&H15) 0 0 0 1 0 1 0 1
SCG
Second. Cmd. Group (&H60-7F) 0 1 1
c o m m d
SDC
Selected Device Clear (&H04) 0 0 0 0 0 1 0 0
SPD
Serial Poll Disable (&H19) 0 0 0 1 1 0 0 1
SPE
Serial Poll Enable (&H18) 0 0 0 1 1 0 0 0
TAG
Talker Address Group (&H40-5F) 0 1 0 a d d r n
TCT
Take Control (&H09) 0 0 0 0 1 0 0 1
UNL
Unlisten (&H3F) 0 0 1 1 1 1 1 1
UNT
Untalk (&H5F) 0 1 0 1 1 1 1 1
Hexadecimal & Decimal Values
Hex Value (QuickBASIC) &H80 &H40 &H20 &H10 &H08 &H04 &H02 &H01
Decimal Value 128 64 32 16 8 4 2 1