MPC5604P code flash read protected

[Sanddy_TTL]

 hello:

         how can i config protected code flash? can not be read code flash, it can protected my code . have example code to read code flash protected config?

[petervlna]

Hello,

To protect the flash you will use Censorship feature.

A password mechanism is designed to grant the legitimate user access to the non-volatile memory.

Please refer to detailed procedure described in Reference manual: 34.7 Censorship

Here is the example for Lauterbach debugger for censoring and uncensoring uC.

Best regards,
Peter

[Sanddy_TTL]

have write Shadow block code example？
*(uint32_t *) 0x00203DD8 = 0xBABADEDA;
*(uint32_t *) 0x00203DDC = 0xAABBCCDD;
*(uint32_t *) 0x00203DE0 = 0x55AA1111;
*(uint32_t *) 0x00203DE4 = 0x55AA1111;
this way can not effect。i can not write in.

[petervlna]

Hello,

I am not familiar with your application, but hopefully you are not executing programming routine from flash:

1. Understand the Shadow Flash Layout:

   • The censorship configuration is stored in Flash Block 0, specifically in the shadow row.
   • This includes the Censor Control Word (CWORD) and Censor Passwords.

2. Prepare Your Application to Run from RAM:

   • You cannot execute code from flash while modifying flash (including shadow flash).
   • Copy the censorship routine to RAM and execute it from there.
   • Use a linker script to place the function in a .ramfunc section.

Best regards,

Peter

[Sanddy_TTL]

hello
my code in the ram to run, i don,t know how to write data to shadow block. how to config can write data to shadow block?

[Sanddy_TTL · Accepted solution]

https://community.nxp.com/t5/MPC5xxx-Knowledge-Base/Example-MPC5604B-Shadow-Flash-Reprogramming/ta-p...
i find this example can write shadow block, thank you very much.