QuadTech Guardian 6100 Plus Instruction Manual page 133

Signal
Name
DAV
NRFD
NDAC
ATN
IFC
SRQ
REN
EOI
DI01
DI02
DI03
DI04
DI05
DI06
DI07
DI08
Interface
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Table 3-1: IEEE-488 Interface Pin Designations
Pin Function
Number
6 Low State: "Data is Available" and valid on DI01
through DI08
7 Low State: At least one Listener on the bus is "Not
Ready For Data"
8 Low State: At least one Listener on the bus is "Not
Accepting Data"
11 "Attention" specifies 1 of 2 uses for the DI01 through
DI08 lines:
Low State: Controller command messages
High State: Data bytes from the Talker device
9 "Interface Clear"
Low State: Returns portion of interface system to a
known quiescent state
10 "Service Request"
Low State: A Talker or Listener signals (to the
controller) need for attention in the midst of the current
sequence of events.
17 "Remote Enable"
Low State: Enables each device to enter remote mode
when addressed to listen.
High State: All devices revert to Local control.
5 "End of Identify"
If ATN is in HIGH state, then EOI LOW state indicates
the end of a multiple-byte data transfer sequence.
If ATN is in LOW state, then EOI LOW state indicates a
parallel poll.
1 The 8-Line Data Bus.
2
If ATN is in LOW state, then the bus conveys interface
3
messages.
4
If ATN is in HIGH state, then the bus conveys device-
13
dependent messages. (Example: carries remote control
14
commands from the controller or from a talker device)
15
16
150799 Rev A3 Page 133 of 177