IFC
E6436
IFC (Interface Clear) is a dedicated control line in the IEEE 488 (GPIB) interface used to reset and clear connected devices on the bus.
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
GPIB signal line
ⓘ
control line ⓘ |
| aliasInContext | GPIB IFC line ⓘ |
| appliesTo | all listeners and talkers on the GPIB bus ⓘ |
| assertedBy |
IEEE 488 GPIB standard
ⓘ
surface form:
GPIB system controller
|
| belongsToSignalGroup | GPIB management lines ⓘ |
| category | hardware control signal ⓘ |
| communicationModelRole | out-of-band control separate from data lines ⓘ |
| direction | controller-to-devices ⓘ |
| distinctFrom |
ATN
ⓘ
IFC software clear (device-dependent command) ⓘ REN ⓘ SRQ ⓘ |
| effectWhenAsserted |
devices abort current GPIB operations
ⓘ
devices clear their interface functions ⓘ |
| electricalType | open-collector line ⓘ |
| fullName | Interface Clear ⓘ |
| function |
clear devices on the GPIB bus
ⓘ
place devices in a known idle state ⓘ reset devices on the GPIB bus ⓘ |
| introducedFor | reliable hardware-level reset of GPIB devices ⓘ |
| logicalPolarity | active low ⓘ |
| partOf |
GPIB interface
ⓘ
IEEE 488 GPIB standard ⓘ
surface form:
IEEE 488 bus
|
| persistence | effect lasts while line is asserted and during defined recovery time ⓘ |
| relatedTo |
GPIB data lines DIO1–DIO8
ⓘ
GPIB handshake lines DAV NRFD NDAC ⓘ GPIB management lines ATN SRQ REN ⓘ |
| reliabilityRole | recover bus from error conditions ⓘ |
| requires | controller capable of asserting IFC line ⓘ |
| safetyRole | provides non-destructive reset mechanism for instruments ⓘ |
| scope | affects all devices on the bus ⓘ |
| signalType | control ⓘ |
| standardizedIn |
IEC 60488
ⓘ
IEEE 488 GPIB standard ⓘ
surface form:
IEEE 488
|
| triggerType | asynchronous with respect to data transfers ⓘ |
| typicalUseCase |
clearing hung or unresponsive GPIB devices
ⓘ
initialization of test and measurement instruments ⓘ |
| usedFor |
bus-wide interface clear
ⓘ
synchronizing device states ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
IEEE 488