Wrong CLENR0 with nRFGo Studio?

[Darrew]

When flashing SoftDevice S130 v2.0.1 with nRFGo Studio (JLinkARM.dll 5.12f) and softdevice protection enabled, the UICR.CLENR0 is written with value 0x00B00100 (~11M Bytes). why?

[Håkon Alseth]

Hi,

 

Are you sure you're not reading the content with different byte endianess?

If you reverse the byte order:

00 b0 01 00 -> 00 01 b0 00

 

Best regards,

Håkon

[Darrew]

The endianess in nRF51 is little, that means (as you correctly mention), CLENR0 is equal to 0x1B000 (108KB). The question is: why is this value?

According to S130_SDS (v2.0) table 27,  the required memory resource is 104 KB and APP_CODE_BASE = 0x1B000. Therefore, it seems that nRFGo Studio takes APP_CODE_BASE for CLENR0.

[Håkon Alseth]

MBR uses 4 k, SoftDevice itself uses 104 k, which amounts to 108 k in total.