L4 R4：ST Cortex-M4 84MHz MCU (STM32F401)
STM32F401 系列属于STM32F4基本型，尺寸最小成本最低的解决方案，具有卓越的动态功耗效率。该系列产品采用意法半导体90 nm工艺和ART加速器，具有动态功耗调整功能，能够在运行模式和从Flash存储器执行时实现低至128 µA/MHz的电流消耗。 停机模式下，功耗低至9 µA。
动态功耗效率和批采集模式（BAM），一种新型面向数据批处理的利用DMA智能优化功耗的模式。STM32F4基本型具有84MHz/105DMIPS的处理速度，提供了最小型、高性价比的解决方案，具有出色的功率效率（Dynamic Efficiency™），并扩大了温度范围（高达125 °C的环境温度）。
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