M252KE3AE Datasheet | Nuvoton Technology

DESCRIPTION The Nu Micro® M251/M252 series is a low-power microcontroller platform based on Arm® Cortex® M23 core for Armv8-M architecture. It runs up to 48 MHz with 32 ~ 256 Kbytes embedded Flash memory and 8 ~ 32 Kbytes embedded SRAM, 4 Kbytes Flash loader memory (LDROM) for In System Programming (ISP). The 32-bit low-power microcontrollers supports wide supply voltage from 1.75V ~ 5.5V and operating temperature range from -40℃ ~ +105℃. Low-power Technology for Io T application The Nu Micro® M251/M252 series behaves low power consumption in Normal Run mode 138μA/MHz at 48MHz, Idle mode 60 μA/MHz, Power-down mode 2.5 μA (RTC on, RAM retention), Power-down mode 1.7 μA (RTC off, RAM retention) and Deep Power-down mode. The Nu Micro® M251/M252 series integrates RTC with independent VBAT voltage source pin to support low power mode with main power off and VBAT only. Its low power, wide supply voltage and fast wake-up features make it suitable for battery-powered Io T applications. Programmable Serial Interface (PSIO) The Nu Micro® M251/M252 series provides up to 8-channel Nuvoton proprietary interface, named as “Programmable Serial I/O” (PSIO), which is capable of generating specific waveform to emulate arbitrary serial munication protocols to connect with specific peripherals by PSIO hardware engine. PSIO can be treated as extension of popular serial munication standard (UART, SPI, I2C, etc.), niche serial munication standard and proprietary protocol (SPI-like protocol for LED-lighting application, etc.). This PSIO hardware engine can simulate prehensive serial munication protocol with low CPU loading, low control plexity and high timing precision at the same time. High elasticity and flexibility makes PSIO a powerful and useful tool while connecting to diverse peripherals. Voltage Adjustable Interface (VAI) - Support 2nd I/O voltage without level-shifter The Nu Micro® M251/M252 series integrates Voltage Adjustable Interface (VAI), up to 6 I/O pins to support the 2nd I/O...