SNLS313I September 2009 – October 2019 DS90UR905Q-Q1 , DS90UR906Q-Q1
PRODUCTION DATA.
An optional At-Speed Built In Self Test (BIST) feature supports the testing of the high-speed serial link. This is useful in the prototype stage, equipment production, in-system test and also for system diagnostics. In the BIST mode only a input clock is required along with control to the serializer and deserializer BISTEN input pins. The Ser outputs a test pattern (PRBS7) and drives the link at speed. The deserializer detects the PRBS7 pattern and monitors it for errors. A PASS output pin toggles to flag any payloads that are received with 1 to 24 errors. Upon completion of the test, the result of the test is held on the PASS output until reset (new BIST test or power down). A high on PASS indicates NO ERRORS were detected. A Low on PASS indicates one or more errors were detected. The duration of the test is controlled by the pulse width applied to the deserializer BISTEN pin. During the BIST duration the deserializer data outputs toggle with a checkerboard pattern.
Inter-operability is supported between this FPD-Link II device and all FPD-Link II generations (Gen 1, 2, 3). See Sample BIST Sequence for entering BIST mode and control.