Using NO_INIT RAM for random number generation in TC3XX

[UserSdp]

Any RAM that is ECC protected must be initialized before it is read, to set the ECC bits.

If PROCOND.RAMIN is set to NO_INIT, is it possible to disable ECC protection on certain range of RAM, and read these uninitialized RAM locations as entropy source for PRNG ? Is there any application note / sample application on this topic ?

[MoD]

No, this is not possible. You can switch off the ECC only for complete RAM.

[UserSdp]

Thank you for your response MoD. How to disable ECC over complete RAM?

[MoD · Accepted solution]

e.g.:

The DSPR memory of the TC1.6.2P is protected from memory integrity errors on a per half-word basis. ECC
protection of the DSPR is enabled via the SSH ECCS register.

Please see register MCi_ECCS (i=0-95) description in the MTU chapter. Disable here the ECC for the needed memory. The information which number is used for which memory you can find in the corresponding appendix manual.