SiM3U1xx High-Performance, Low-Power, 32-Bit Preci.
Silicon Laboratories
SiM3U156-B-GQ - 32-Bit Precision32 USB MCU
SiM3U1xx High-Performance, Low-Power, 32-Bit Precision32™ USB MCU Family with up to 256 kB of Flash 32-bit ARM® Cortex™-M3 CPU Analog Peripherals -.