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We have a board utilising a Nios II/f in a Cyclone 2 FPGA which was designed 4 years ago. Up until recently the production boards have worked fine however over the last 6 months we are seeing a significant number of boards which are failing. The firmware running on them hangs either at start-up or at any point within 2 weeks of been powered up. We are looking at a failure rate of abut 30% in a quantity of 250 boards. For every identified failed board, the board manufacturer replaces the FPGA and the problem goes away. Right now they can’t explain the root cause, they have looked closely at their manufacturing processes and supply chain and everything seems in order. Debugging the running software, on the faulty boards the registered exception handler is being triggered with a misaligned target PC cause (
nios2_exception_misaligned_target_pc = 7).
Has anybody experienced similar? Or have any other comments or suggestions?
Thanks in advance
Adrian
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Hi,
You might want to constact Altera to investigate on the faulty device since the failure rate seems high.
Honored Contributor
