Bootloader programming issue The flash is not erased

[ting²]

Hi everyone, I am using the nRF51822, I have an issue of programming the bootloader. It is said that the flash is not erased. But I just did an erase all before programming. Is there anyone who encountered the same issue? Thanks!

[bjorn-spockeli]

@keton : Yes, the PSELRESET[0] and PSELRESET[1] are set to 0xFFFFFFFF upon reset, i.e. no pin will have the nRESET function. However, please note that P0.21 is the only pin that can be used as the reset pin on the NRF52.