I'm measuring ~1.7mA @ 3V in SLEEPMODE_CPU_HALT and SLEEPMODE_WAKETIMER modes.
This is with all peripherals disabled except NVM and SYS_CONTROL.
The datasheet indicates:
Sleep mode: 32 kHz XO ON (24 KB retention RAM) ------- 0.9 uA typ
Active mode: CPU, Flash and RAM on ------- 1.9 mA typ
I expected halting the CPU to result in a much lower current draw than "Active mode", however it seems to be pretty much the same and to be the same as SLEEPMODE_WAKETIMER.
I measure an expected <20 uA in SLEEPMODE_NOTIMER.
Appreciate any help,