topic Re: Erase all blocks in S32K

Erase all blocks

814420552 — Thu, 06 Aug 2020 02:56:36 GMT

hello

I have three questions:

<1>

The following command description is conflict

The first picture description：secure byte is erase ， MCU is security

but the second picture description: release MCU security

which one is wrong？

thanks in advance.

<2>

when MEEN=10, mass erase can't be erase， is it right？ but why the follwing command can't be supported?

<3> I didn't understand when the order would be used， for example Erase all block & erase all block unsecure？ when execute the code is erased, MCU is not working, so what is the necessity of these two commands？

Re: Erase all blocks

danielmartynek — Tue, 11 Aug 2020 12:34:12 GMT

Hello Kui Wu,

I don't see any conflict.

Erase All Block Command only releases the security in the FSEC[SEC] register.

Whereas

Erase All Block Unsecure Command programs the SEC bits in the Flash Configuration field to the unsecure state (0b10).

This is the mass erase command

It allows either erasing the whole memory including flash configuration field (SEC = 0b11) or erasing the whole memory and program the flash configuration field to unsecure state (SEC = 0b10).

Regards,

Daniel

Re: Erase all blocks

814420552 — Wed, 12 Aug 2020 01:31:38 GMT

hello Daniel，

Erase all blocks unsecure command is the same command with Debugger's mass erase?

Re: Erase all blocks

danielmartynek — Wed, 12 Aug 2020 08:10:49 GMT

Hello Kui Wu,

Please take a look at AN12130 Production Flash Programming Best Practices for S32K1xx MCUs

BR, Daniel

Re: Erase all blocks

814420552 — Wed, 12 Aug 2020 09:01:56 GMT

Dear Daniel，

So Erase all blocks unsecure command and debugger mass erase command is the same command? because their

action are the same.

Re: Erase all blocks

danielmartynek — Wed, 12 Aug 2020 09:36:57 GMT

Hello Kui Wu,

The difference is that Erase All Blocks Unsecure is available internally whereas Mass Erase is available externally but they both do the same.

Regards,

Daniel

Re: Erase all blocks

814420552 — Tue, 01 Sep 2020 05:57:49 GMT

hello，

when MEEN = 10， it means mass erase will execute fail but why Erase All Blocks Unsecure command also will execute fail?

Re: Erase all blocks

danielmartynek — Tue, 08 Sep 2020 10:52:31 GMT

Hello,

I'm sorry for the delay.

When MEEN = 0b10, Mass erase is disabled.

So yes, it will fail.

Regards,

Daniel