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Altera_Forum
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14 years ago

unexpected CPU/hardware reset

We have a board custom based on a cyclone III and everything has been working well for months. In a recent batch of boards we received, however, occasionally the system seems to unexpectedly reset. I...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

When using a different build it seemed that the problem was unrelated to the IORD. Additionally, sometimes when programming the flash I get some garbage in the CFI query table (although verification is OK),

CFI query table read from device:

10: 51 52 59 01 00 0A 01 00 00 00 00 17 20 85 95 06 QRY......... ...

20: 09 09 00 02 02 03 00 18 01 00 09 00 02 03 00 80 ................

30: 00 7E 00 00 02 00 00 00 00 FF FF FF FF FF FF FF .~..............

40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ................

50: FF FF 89 1B 44 00 08 59 08 59 64 00 64 00 64 00 ....D..Y.Yd.d.d.

60: 64 00 F8 00 FF FF 00 00 00 00 EC 02 E4 02 EF AD d...............

70: EF AD 40 02 00 00 C7 00 B8 00 48 0F 48 0F EF AD ..@.......H.H...

I also suspect a hardware issue and will look into the things you mention Daixiwen. Thanks.