Low-Power Embedded

Purpose

Guide agents through MCU low-power modes: sleep vs deep sleep (stop/standby), peripheral and bus clock gating, wake-up source configuration, and practical current measurement — with Cortex-M WFI/WFE and vendor PWR examples (STM32-focused patterns apply broadly).

When to Use

• Battery-powered firmware missing power budget
• Wake-up latency vs consumption tradeoffs
• Debugging "device won't wake" or "current still mA in sleep"
• Before shipping RTOS idle hook or bare-metal main loop sleep
• Cross-linking with skills/baremetal/interrupts-and-exceptions-baremetal

Workflow

1. Power mode hierarchy (STM32-style)