Coprocessor capable of performing I2C

[TilakLakshmana]

Hi,

I have low power environmental sensor. They raise an interrupt that something was sensed and require to read some registers on the sensor via I2C and run a state machine to figure out if something really happened. Waking up the main CPU is expensive and it drains the battery. 

Are there any nRF chipset with coprocessor that can perform these I2C  operations and state machine computations without waking up the main CPU?

Thanks, Tilak 

[Edvin]

Hello,On the nRF54L15 (which you used in your tag) there is not much to save on using the coprocessor compared to using the mainn processor. So for all purposes, I recommend that you just use the cpuapp for this.

Best regards,

Edvin

[TilakLakshmana]

Thank you Edvin! Digging up! I noticed that the nRF54L15 already has ARM M33 + RISC-V coprocessor. Can you provide some numbers or please point me to suitable documentation where how much we save in battery when using a RISC-V coprocessor compared to the M33? Or suitable example to look at when using RISC-V. I am looking to save 4uA which will extend the battery life significantly for my use-case.

[Edvin]

Hello,

We don't have exact numbers for the RISC-V coprocessor. But it is not expected that running only this will draw less current than the ARM M33.

BR,
Edvin