What are these magic registers 4001e504 and 4001e50c used to erase nRF51422?

[Mahesh Venkitachalam]

While reading about setting up nRF51 development environment on OS X, I came across the following:

Unfortunately the only way to erase the memory is to do some magic register writes:

JLinkExe
J-Link>w4 4001e504 2
J-Link>w4 4001e50c 1

What are the above registers? Is this something specific to jlink or the nRF51422? I couldn't find any reference to these addresses in the documentation.

Thanks for any insight.

[RK]

nrf51 reference manual V2.1 page 15 table 5 plus table 3 on page 13 showing peripheral 30, the NVMC, has base address of 0x4001E000.

All documented, no magic.

[Mahesh Venkitachalam]

I did search in the PDF for these numbers, but I guess I was off by a few bits. Thanks.

[RK]

I've learned through cold bitter experience to search for the last 4 digits or the first 4 digits as it's usually an offset (last 4) to a base (1st four).

[Mahesh Venkitachalam]

I'll definitely be doing that from now on!