topic LPC 1768 CRP3 Enabled Device Recover in LPC Microcontrollers

LPC 1768 CRP3 Enabled Device Recover

vijayg — Wed, 12 Mar 2025 14:22:38 GMT

Hi,

We are using LPC1768 with CRP3 is enabled in the code for security purpose.

But due to some FOTA issue our Application is got corrupted and not running.

We want to recover this Device's either JTAG or ISP Mode.

Since CRP3 is enabled , LPC1768 not allowing JTAG and ISP Mode.

Please any suggestion to Recover those Device's.

Re: LPC 1768 CRP3 Enabled Device Recover

Alice_Yang — Thu, 13 Mar 2025 02:18:22 GMT

Hello @vijayg

I don’t believe the device can be recovered because, at the CRP3 level, both ISP pin and SWD are disabled.

Be aware that there is no built-in recovery for designs once CRP Level 3 is enabled. The most simplistic way of implementing a custom recovery mechanism involves the “Re-Invoke ISP” IAP call.

Alice