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Altera_Forum
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16 years ago

Odd EPCS Silicon ID Reading

Hi folks, When attempting to read the Silicon ID of an EPCS64 flash, I start by sending these four bytes (MSbit first): 0xAB, 0x00, 0x00, 0x00. I can see that the EPCS64 drives data on t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Something seems to be wrong with your method to interface the chip, either hard- or software. Without knowing the details, the reason can hardly be guessed. Seeing a signature length of 6 instead of 8 (it is repeated by design) suggests some kind of double clocking, e.g. due to signal integrity issues.

Frank