S12 / MagniV Microcontrollers中的主题 initialization RAM check for S12ZVL128

initialization RAM check for S12ZVL128

premchand_chenn — Thu, 27 Feb 2020 12:01:17 GMT

Hello All

Thanks in advance

we are using S12ZVL128. we enable ECC for RAM. can you please help, is ECC test help to cover during initialization RAM faults??or we need to implement the pattern check to cover initialization ram check

Re: initialization RAM check for S12ZVL128

danielmartynek — Thu, 27 Feb 2020 13:53:56 GMT

Hello premchand.chennupati@valeo.com,

I'm not sure if I understand, could you please elaborate?

Anyway, the SRAM is initialized with zeros during POR (Section 8.3.4, S12ZVL RM rev.2.48).

Safety Manual for MagniV SafetyDevices rev.2

BR, Daniel

Re: initialization RAM check for S12ZVL128

premchand_chenn — Fri, 28 Feb 2020 04:21:51 GMT

Hello Daniel,

Thanks a lot for inputs

normally we will do pattern check on RAM after every initialization, to check any RAM failures. instead of pattern check either ECC will check ram failures after every initialization.

No need to implement pattern check ??

Re: initialization RAM check for S12ZVL128

danielmartynek — Tue, 03 Mar 2020 09:18:05 GMT

Hello premchand.chennupati@valeo.com,

The initialization after POR only initializes the SRAM to zeros along with the ECC information.
But it does not check for failures during the initialization.

During an aligned memory write, no ECC check is performed.

The ECC check is performed when the SRAM is read.

It depends on your application requirements.

Regards,
Daniel