DocumentCode :
3637538
Title :
On-line testing of bundled-data asynchronous handshake protocols
Author :
Steffen Zeidler;Alexander Bystrov;Miloš Krstic´;Rolf Kraemer
Author_Institution :
IHP - Innovations for High Performance Microelectronics Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
fYear :
2010
Firstpage :
261
Lastpage :
267
Abstract :
Asynchronous interfaces, being a popular way of dealing with timing closure problems in deep submicron SoCs, pose a serious problem for on-line testing. Their behavior is specified not as a traditional clocked automaton, but as an asynchronous protocol with timing which depends on the clocks of the communicating blocks, wire and gate delays. The problem is exacerbated by the use of non-encoded bundled data buses, whose transitions cannot be reliably detected, as opposed to very expensive self-timed data encodings. This paper presents a further development of our low-cost checkers for asynchronous handshake protocol, which now support bundled data and are interfaced to the scan chains to assist diagnosis and debugging. Further reduction of area requirements for the delay elements, possibilities to define separate delays for each protocol phase, test results collection and checking the timing relationships between the handshake and the data signals are discussed. An application of the data transition detectors to checking of synchronous SDR/DDR protocols is shown.
Keywords :
"Delay","Protocols","Logic gates","Clocks","Circuit faults","Testing"
Publisher :
ieee
Conference_Titel :
On-Line Testing Symposium (IOLTS), 2010 IEEE 16th International
Print_ISBN :
978-1-4244-7724-1
Type :
conf
DOI :
10.1109/IOLTS.2010.5560190
Filename :
5560190
Link To Document :
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