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Altera_Forum
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15 years ago

EPCS16 and problems

Hi guys. I met a problem.As i understand, I am not first person,which has same problems. Lets go. When i try to program flash memory(Altera EPSC16N) by HW and for this purpose i have .jic file...
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Altera_Forum
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14 years ago

I am having the same issue with an EPCS64N. I have two boards running identical .sof loads - one works and returns this from nios2-flash-programmer:

Looking for EPCS registers at address 0x30000400 (with 32bit alignment)

Initial values: 00000000 00000000 00000260 00000000 00000000 00000001

Valid registers found

epcs signature is 0x16

EPCS identifier is 0x202017

Using EPCS size information from section [EPCS-202017]

Device size is 8MByte (64Mbit)

Erase regions are:

offset 0: 128 x 64K

EPCS status is 0x00

The other fails and returns this:

Looking for EPCS registers at address 0x30000400 (with 32bit alignment)

Initial values: 00000000 00000000 00000260 00000000 00000000 00000001

Valid registers found

epcs signature is 0xff

EPCS device doesn't support RDID command

No EPCS layout data - looking for section [EPCS-FF]

Unable to use EPCS device

Leaving target processor paused

Does anybody know why an identical (in theory) circuit and device would return a signature of 0xFF? I have replaced the EPCS64N - same result. I checked the DCLK, DATA, nCS, and ASDI signals with a scope and all look good and similar between boards.

Are there bad devices floating around? (These were purchased from DigiKey - an authorized Altera distributor.)