topic Re: FlexRAM OCRAM in i.MX Processors

FlexRAM OCRAM

po-pony — Sun, 16 May 2021 10:26:50 GMT

It is stated in the application note - AN12077, that the minimum configuration of OCRAM is 64 KB. This is
required due to ROM code requires at least 64 KB of RAM for its execution. The minimum OCRAM requirements can be device dependent.

But I can't find any such description in the 1024/1050 reference manual. All described are “RAM size of ITCM, DTCM and OCRAM can be configured from 0 to full RAM Array size separately".

I set OCRAM to 0, and the code seems to be able to run, so what is the actual situation?

Re: FlexRAM OCRAM

Yuri — Mon, 17 May 2021 05:34:07 GMT

@po-pony
Hello,

Some memory is needed for boot purposes, therefore - although FlexRAM can be configured
for any size, including zero - really the minimum configuration of OCRAM of 64 KB is required
by boot ROM - this is correct. This relates only to boot ROM, which is affected only by the FUSE FlexRAM bank configuration.

Regards,
Yuri.

Re: FlexRAM OCRAM

po-pony — Fri, 28 May 2021 03:52:05 GMT

Thank you！