RE: Ctrl-Ap indicates that the device is secured

NRM — Sat, 30 Jul 2022 10:19:07 GMT

I try nrf5 SDK 17.1.0 example but it doesn’t work and the problem still remains, also MDK updated for latest version.
how can I disable the access port protection in command line for APPROTECT.DISABLE?
Even though I follow all the instructions in this guide, the same error persists.
I will very grateful if you tell me what can I do step by step, that this problem solve.

RE: Ctrl-Ap indicates that the device is secured

Kenneth — Tue, 26 Jul 2022 13:11:40 GMT

Hello,

I suspect the nRF52840 board are now mounted with the latest revision 3 of the nRF52840, which include some changes that require the latest nRF5 SDK 17.1.0 or that you need to update the MDK files on older nRF5 SDK
Description of change: https://infocenter.nordicsemi.com/pdf/in_141_v1.1.pdf
Compatibility: https://infocenter.nordicsemi.com/topic/comp_matrix_nrf52840/COMP/nrf52840/nRF52840_ic_rev_sdk_sd_comp_matrix.html

A description on how to update to new MDK (device family pack) in Keil for older nRF5 SDK is described here:

RE: MDK uVision SDK 16.0 keil Family Pack Installation

Best regards,
Kenneth