topic Re: SwdRead: Timeout waiting for response_"LPC55s28" in LPC Microcontrollers

SwdRead: Timeout waiting for response_"LPC55s28"

Trada94 — Tue, 11 Feb 2025 01:57:41 GMT

Hello community,

I have the following issue when I trying to lock the MCU LPC55sXX.

I am following these steps to lock the MCU:

1.- Configure the MCU in ISP mode.

2.- Write the bin file to the CFPA.

3.- Write the bin file to the CMPA.

4.- Verify if the MCU is locked and expected the following result:

The issue occurs intermittently.

Any help would be greatly appreciated.

Re: SwdRead: Timeout waiting for response_"LPC55s28"

Alice_Yang — Tue, 11 Feb 2025 06:43:18 GMT

Hello @Trada94

To disable the ISP and SWD of LPC55xx, please refer to

https://community.nxp.com/t5/LPC-Microcontrollers-Knowledge/LPC55-Disable-ISP-and-SWD-to-utilize-code-protection/ta-p/1654157

Alice

Re: SwdRead: Timeout waiting for response_"LPC55s28"

Trada94 — Fri, 14 Feb 2025 04:12:12 GMT

Hello @Alice_Yang

I am trying to understand the functions of CMPA and CFPA.

Could you please explain what they are?

Thanks, I really appreciate your help

Re: SwdRead: Timeout waiting for response_"LPC55s28"

Alice_Yang — Mon, 17 Feb 2025 10:18:41 GMT

Hello @Trada94

CMPA (Configuration Memory Protection Area) and CFPA (Code Flash Protection Area) are mainly used to store security-related configuration information and provide protection functions for memory areas.

For details, please refer to "Chapter 10: LPC55S6x/LPC55S2x/LPC552x Protected Flash Region" of UM11126.

Alice