Turning OFF unused RAM on nRF52810 (CAAA) without Soft Device.

[Brian]

Hello!

A quick question about how to shutdown unused RAM on the nRF52810-CAAA?  

We're not using any of the Soft Devices.  Our code is pretty tiny.   Map file attached.

We’re using the internal RC oscillator, then, going to sleep, waking up, sending a beacon, sleep, etc.

__WFE(); // wait for event

__SEV(); // go to sleep

__WFE();

Before we go into that while() loop, we’ve been trying to shutdown unused RAM with 

NRF_POWER->RAM[0].POWER = 0x00000001;

NRF_POWER->RAM[1].POWER = 0x00000000;

NRF_POWER->RAM[2].POWER = 0x00000000; 

But, that’s crashing our chip. 

Or should it be done this way?

NRF_POWER->RAM[1].POWERCLR = 0x00030003;

NRF_POWER->RAM[2].POWERCLR = 0x00030003;

Thanks,

Brian

main.map

[Simon]

See this link, which explains how to power down all the RAM memory sections for the nRF52840. It should be done similarly for nrf52810, just that it has 3 sections.

Best regards,

Simon