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]

If the device was running the demo code, then I doubt that its a faulty chip. Could you read out the flash after erasing the chip using the follwing command in nrfjprog

nrfjprog --memrd 0x0000 --n 262144 > flash_dump.txt

and then attach the flash_dump.txt to your question?