11. GPIB USB Controller
PROLOGIX GPIB-USB Controller
Operate in GPIB Controller mode via USB port
Support GPIB protocol
12. What is GPIB
GPIB : General Purpose Interface Bus
History
Developed by HP in 1960s --> HP-IB
IEEE standardized the bus --> ANSI/IEEE-488.1
Commands and Protocol --> ANSI/IEEE-488.2
IEEE/IEC revised in 2004 --> IEC-60488-1,-2
Standard Commands for Programmable
Instruments --> SCPI-1999
A byte cannot transfer in less than the time it takes for the following events to occur:1. NRFD propagates to the Talker, all say READY
2. DAV signal propagates to all Listeners, (Not) ready for DATA , enable a Byte capture
3. Listeners accept the byte and assert NDAC, (Not) Data Accept
4. NDAC propagates back to the Talker
5. Talker allows time for settling (Byte 2) , and then assert DAV again