what's difference softDevice handle 16K and 32K RAM

[wen jin zhang]

i meet very strange problem! i using nRF51822 QFAC. it has 32K RAM. but when we using 32K RAM Linkscript file. the firmware did not run up. it seem dead in sd_ble_enable() function. but if we using 16K RAM linkscript file. it's ok! we found the BLE device. 16K RAM: MEMORY { FLASH (rx) : ORIGIN = 0x00016000, LENGTH = 0x2A000 RAM (rwx) : ORIGIN = 0x20002000, LENGTH = 0x2000 } 32K RAM: MEMORY { FLASH (rx) : ORIGIN = 0x00016000, LENGTH = 0x2A000 RAM (rwx) : ORIGIN = 0x20002000, LENGTH = 0x6000 }

softDevice: s110_nrf51822_7.0.0_softdevice

[RK]

If you just type '32K' into the 'search in questions' box you'd quickly find this post

devzone.nordicsemi.com/.../

which points you to the release notes for 7.1 and 7.2 which do indeed tell you this is a known issue.

[wen jin zhang]

Sorry! i'm newbie on nRF51822. in the devzone.nordicsemi.com/questi... . it just mention S120 and no S110. questions:

1. Do the S110 has same issue on s110_nrf51822_7.1.0_softdevice, s110_nrf51822_7.2.0_softdevice?
2. which version S110 softdevice has fixed this issue? if No. when we can get this issue be fixed?

[Hung Bui]

Hi Wen,

S110 v7.0.0 doesn't support memory address that is outside of the 16kB range. The S110 v7.1.0 fixed this issue.

You should be able to use XLR3+ chip with S110 v7.1.0 with full 32 kB.

I agree that the documentation is not very clear on that and we will try to fix this.