initialization RAM check for S12ZVL128

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initialization RAM check for S12ZVL128

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premchand_chenn
Contributor I

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 

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premchand_chenn
Contributor I

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 ?? 

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danielmartynek
NXP TechSupport
NXP TechSupport

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.

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The ECC check is performed when the SRAM is read.  

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It depends on your application requirements.

Regards,
Daniel

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danielmartynek
NXP TechSupport
NXP TechSupport

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).

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Safety Manual for MagniV SafetyDevices rev.2

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BR, Daniel