Hi,
I have a project with nRF52840 where I uses 3xSPIM. 2 are connected to a real-time-clock and accelerometer. The third is connected to an SD-card.
I realized that the idle power consumption is ~1mA when the SPIM modules is not closed between communication. It seems the HFCLK continues to run.
The RTC and accelerometer is easy to shut down and is only sampled with 20Hz.
However the SD-card cannot be shut down without closing the file-handle and do a reinitialization each time.
I am writing to the sd-card every 20 second and I am unsure if a sd-card can handle being reinitialized so many times (lifetime of product is 10 years).
Are there anyway to shut down the HFCLK or reduce idle power of the SPIM modules or what is the normal way of doing this?
Regards,
Morten
