DA14531 SmartBond TINY Module
6 months agoPosted by thomas.linder 40 points 2 replies
This question explicitly targets the DA14531MOD (the one with the SPI flash embedded into the module). I read the documentation on sleep modes:
I understand that this documentation is for the non-module version but I see that it should consume 1.2uA (or something around that) in Deep Sleep mode.
I have also read various threads that point out that the embedded SPI flash requires ~9uA when it's enabled and not in sleep mode.
Currently, I have tried with the sleepmode and prox_reporter example and I am unable to achieve a lower current consumption than 9.5uA, measured with a Fluke 87 IV and a Keithley 2635B Source Meter - so the value should be fairly exact. I am only using the module and supplying it directly with 3.0V through the battery connector.
I have read that one should put the SPI flash into PowerOff mode to further reduce the current consumption but although I have added the required call to both examples (and checking that the SPI flash is initialised at all) I am unable to get any lower than those 9.5uA.
Can you give me a Step-By-Step example on what to do. I have the current SDK (SDK_22.214.171.1244) with the hotfix. I'd like to know which example I should start to modify to achieve less than 2uA power consumption.