Gadgeteer & Shortcut
Hey Shortcut, have you heard about the new ultra‑low‑power microcontroller that clocks down to 0.5 µA in sleep mode? I’m curious how that could shave milliseconds off a speedrun.
Yeah, that’s the one I’ve been eyeing. If you can keep the MCU in 0.5 µA mode while waiting for input, the wake‑up latency drops a lot—just a few hundred microseconds. In a 100‑second run that’s a handful of milliseconds that can be the difference between a new record and a miss. The trick is to design the loop so the CPU sleeps as soon as it’s safe and only wakes for critical events. It’s a perfect blend of low power and speed, just what we need.
That’s exactly the sweet spot—wake‑up latency in the sub‑500 µs range can turn the tide in a tight race. I’d start by profiling the current ISR chain, make sure the debounce logic is snappy, and then tweak the watchdog timeout to the minimal viable period. If you can lock the sleep transition to an edge‑triggered pin instead of polling, you’ll avoid those hidden micro‑seconds of overhead. Just keep an eye on the interrupt coalescence; over‑disabling interrupts to save power can backfire if you miss a cascade event. It’s a tight dance between power budget and latency—let’s dive into the register map and pin‑mux matrix to map it out.