3 ms·
> Its sleep mode draws 0.8 mA. What's your source for this? The RP2040 datasheet claims 0.18 mA for Dormant state and 0.39 mA for Sleep. As you've got detailed
by gchadwick 5y ago
> Its sleep mode draws 0.8 mA.
What's your source for this? The RP2040 datasheet claims 0.18 mA for Dormant state and 0.39 mA for Sleep. As you've got detailed control over what gets clock gated in sleep state suspect you can bring that 0.39 mA down if you've only got one or two wake events to care about.
- mmoskal 5y agoThe datasheet is really skimpy about the power draw, especially compared to what ST Micro tells you. In STM32 parts the Sleep mode is usually pretty bad (say half of normal consumption) and you need to go to Stop mode, where the core and most peripherals are not clocked to get into micro-amp range. However, once there you can typically get by with under 5uA. You can wake up from that in a few microseconds if you clock from internal oscillator with no PLL (so you run at 8-16MHz not 48-64MHz). In that context, 180uA is pretty bad, but again, the datasheet is not very clear.
- IshKebab 5y agoThat's still really high though. nRF51 sleep current is around 2 microamps. You can run it off a coin cell for years (depending on what you're doing). Sounds like an RP2040 would last maybe a week.