topic Re: about Region Descriptor Alternate Access Control in MPU in S32K

about Region Descriptor Alternate Access Control in MPU

Yellen — Fri, 02 Jun 2023 02:27:55 GMT

Hi,

I could not understand the register RGDAACn (n = 0 to 15) in MPU of S32K144.

1. Shall I write the same value as RGDn_WORD2 to RGDAACn in MPU initailzation period?

2. If I write other value to RGDAACn in runtime, will the value in RGDn_WORD2 be changed automaticly?

Best Regards

Yellen

Robin_Shen — Fri, 02 Jun 2023 08:44:02 GMT

Hi Yellen,

Please refer to the discussion in this thread S32K144's MPU issue

Best Regards,
Robin

Yellen — Sat, 03 Jun 2023 01:52:12 GMT

Hi Robin,

Thanks for your reply.

I have read through that thread and I make two conclusions:

1. The RGDAACn should be written the same value as RGDn_WORD2 in MPU initialization phase.

2. The RGDn_WORD2 will be changed automaticly to the same value as RGDAACn after writing to RGDAACn in the runtime.

Am I right?