48MHz Cortex-M0+ 32-bit CPU

Supports single-cycle multiply instructions

Up to 256KB Flash and 28KB SRAM

1KB OTP

Flexible power management mode

– Auto switching of VBAT backup power

– 0.9μA VBAT mode + RTC + backup register

– 1μA Stop mode, CPU + SRAM hold mode

– 1.3μA Stop mode + RTC

Power monitoring: supports BOR and PVD

Clock source

– External high-speed clock: 4~32MHz, supports oscillation stop detection

– External low-speed clock: 32.768KHz, supports oscillation stop detection

– Internal high-speed clock: 16MHz, full temperature change ≤ ±2%

– Internal low-power low-speed clock: 32KHz

– PLL: 6MHz ~ 48MHz

Up to 73 IOs, anti-backflow and compatible with 5V communications; up to 20mA for IO with high drive capability

2-channel DMA controller with flexible mapping

RTC supports alarm clock and cycle timer,with calibration accuracy of ±0.477ppm

9x timers

– 3x 16-bit 4-channel general timers

– 1x 16-bit basic timer

– 2x 16-bit low-power timers, one of which supports orthogonal encoding

– 1x 24-bit SysTick

– 2x watchdogs: IWDG and WWDG

IRTIM supports timers and U(S)ART interconnection for infrared control

Communication interface

– 2x LPUART interfaces, supports wakeup from Stop mode

– 4x U(S)ART interfaces, one of which supports ISO7816 and SPI master mode; 3x UART interfaces

– 2x SPI interfaces, with maximum speed of 20Mbps in master mode and 16Mbps in slave mode

– 1x I2C, supports master and slave modes, 1Mbps Fm+ and wakeup from Stop mode

Information security

– AES algorithm coprocessor

– TRNG, CRC

– TAMP anti-tamper and backup registers

LCD supports up to 8COM x 40SEG

– Charge pump mode: strong drive capability; VLCD boost voltage can be higher than VDD and does not varies with VDD; VLCD can be configured in multiple levels up to 5.25V

– On-chip resistor voltage dividing mode: Contrast is adjustable in 16 levels, high and low drive capacity can be switched dynamically, and no external capacitor is required

12-bit 1Msps high-precision SAR ADC, capable of measuring signals with high output impedance

2x ultra-low power comparators with 6-bit DAC comparison reference and rail-to-rail input supported

Built-in reference voltage source VREFBUF: 3.0V, 2.5V, 2.048V, supports output through IO

1x temperature sensor, with maximum error of ±2°C

96-bit unique ID

Built-in Bootloader: supports UART

SWD debugging

Operating conditions: 1.8V~5.5V, -40°C~85°C

Package: LQFP80/64/48