S32K中的主题 Re: Memory protection registers NXP

Memory protection registers NXP

sgp_118 — Wed, 01 Apr 2020 15:01:21 GMT

Hi All,

I am working on S32K148 chip and had accidentally written the Program Flash Protection Registers (FPROT0 - FPROT3) with 0. Post this, I couldn't program the chip through debugger.

Is there a way where this protection can be removed through design studio utility, since even the JTAG connection is not possible post this?

Re: Memory protection registers NXP

danielmartynek — Fri, 03 Apr 2020 10:36:55 GMT

Hi sgp_118,

Did you rewrite the FPROT registers or the FPROT bytes in the Flash configuration field?

Either way, if you FSEC_MEEN is not disabled, you should be able to mass erase the MCU.

S32K1xx RM rev.12

AN12130 Production Flash Programming Best Practices for S32K1xxMCUs

What debugger do you have?

And what error message do get from the IDE when the debugger is connecting?

Thanks,

BR, Daniel

Re: Memory protection registers NXP

sgp_118 — Mon, 06 Apr 2020 14:26:24 GMT

Hi Daniel,

Unfortunately all the registers in the region 0x400 - 0x40C are overwritten with 0s in the board

I am using S32K DS with P&E micro debugger.

Regards,

Guru

Re: Memory protection registers NXP

danielmartynek — Sun, 12 Apr 2020 11:47:18 GMT

Hi Guru,

0x00 at 0x40C means that the MCU is secure but Mass Erase is enabled.

So, the debugger should be able to mass erase the MCU unless there is another issue like allocated CSEc keys.

AN12130 Production Flash Programming Best Practices for S32K1xx MCUs

BR, Daniel