The 32-bit EFM32PG22 from Silicon Labs is a 32-bit Microcontroller based on the Arm Cortex-M33 core with a Floating Point Unit (FPU) and TrustZone security. It operates at a maximum frequency of 76.8 MHz and equipped with up to 512 KB of Flash memory and 32 KB of RAM. It is designed for ultra-low power applications that achieves a consumption of 26 μA/MHz in Active Mode (EM0) and as low as 0.17 μA in EM4 shutoff mode. The MCU integrates advanced security features including Secure Boot with Root of Trust and Secure Loader (RTSL), a True Random Number Generator (TRNG) and hardware accelerators for AES-128/256, SHA-1, SHA-2, ECC and ECDSA/ECDH. It supports a broad range of peripherals such as a 12-bit ADC at 1 Msps / 16-bit at 76.9 ksps, multiple timers, a watchdog, a low-energy timer, USART, EUART, I²C and a PDM interface for digital microphones. The device includes an LDMA controller, Peripheral Reflex System (PRS) and integrated DC-DC converter for enhanced efficiency. It requires a supply voltage range of 1.71–3.8 V and measures 5 x 5 x 0.85 mm (QFN40) and 4 x 4 x 0.85 mm (QFN48). The MCU is ideal for battery-powered and low-energy systems, with applications in personal hygiene devices, industrial automation, remote controls, passive keyless entry (PKE), tire pressure monitoring systems (TPMS), personal hygiene devices, passive entry passive start (PEPS), tire monitoring sensors (TMS) and rearview mirrors.