Recover the MBR

[mamrezo]

hello i have nRF51822 QFAAH1 and accidentally erased the chip and also MBR section with jlink, what should i do for bring MBR back.

[bjorn-spockeli]

Hi Mamrezo,

the MBR is a part of ourSoftDevices, see this page on Infocenter, thus you just have to flash the SoftDevice to your nRF51822.

Best regards

Bjørn

[mamrezo]

you are right, but why first time it worked but when i erased all the chip didn't work? when i upload the program at 0x00000000 instead of 0x0001C000, it works (without using SD)