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Altera_Forum's avatar
Altera_Forum
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17 years ago

Epcs4 interface problem

Hi, I am using EPCS4SI8N through SPI interface to a microcontroller to write and read data. Right now I have done the connections accordingly but have problems with read and write to the serial EE...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi,

so best is realy to start with the indentifier command (0x20).

- CS low

- write 0x20

- read 3 bytes

- CS high

I assume you'll get zeros again. If so, you need to check with a scope the right order of the bits, clock edges, etc. Best is to compare it with the drawings e.g. in the data sheet of M25P32.

Regards,

Heiko