Coprocessor capable of performing I2C

RE: Coprocessor capable of performing I2C

Edvin — Wed, 12 Nov 2025 08:42:15 GMT

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

RE: Coprocessor capable of performing I2C

TilakLakshmana — Mon, 10 Nov 2025 13:47:31 GMT

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.

RE: Coprocessor capable of performing I2C

TilakLakshmana — Wed, 05 Nov 2025 14:33:47 GMT

Thanks

RE: Coprocessor capable of performing I2C

Edvin — Wed, 05 Nov 2025 14:32:05 GMT

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

RE: Coprocessor capable of performing I2C

Turbo J — Sat, 01 Nov 2025 06:58:49 GMT

[quote userid="142320" url="~/f/nordic-q-a/125328/coprocessor-capable-of-performing-i2c"]Waking up the main CPU is expensive[/quote]

Not on NRF52xxx or NRF53xx chips if you know what you are doing.