The LH32M0S3 series microcontrollers use a high-performance 32-bit ARM® Cortex®-M0 core, embedded up to 128Kbytes FLASH and 4Kbytes SRAM, with a maximum operating frequency of 32MHz. The chip provides standard communication interfaces (I2C, SPI and USART), multiple 24bit high-precision ADCs, two 16bit timers, one buzzer driver and screen controller. The LH32M0S3 series microcontrollers support maximum 4x20 LCD and maximum 7x8 LED control. The operating temperature range of LH32M0S3 series microcontrollers is -40°C~105°C, and the operating voltage range is 2.2V~3.6V. The chip provides a series of power working modes to meet different low power consumption applications. LH32M0S3 series microcontrollers are suitable for a variety of application scenarios, such as infrared temperature measurement, high-precision measurement, blood oxygen saturation, sphygmomanometer, data acquisition, industrial control, etc.

Product Features

● Kernel

— 32-bit ARM® Cortex®-M0 CPU

— Up to 32MHz operating frequency

● Memory

— Maximum 128 Kbytes FLASH memory

— 4 Kbytes SRAM

● Clock module

— Internal 32MHz RC oscillator (HRC), typical ±1% accuracy

— Internal 32KHz RC oscillator (LRC), typical accuracy ±10%

— 32.768KHz Low Speed Crystal Oscillator (LXT)

● Working environment

— VDD voltage: 2.2~3.6V

— VDDA voltage: 2.2~3.6V

— Temperature range: -40~105℃

● Power Management

— Low-power modes: Sleep, Deep-sleep and Power-down modes

— Support power-on/power-down reset (POR/PDR)

— Supports Low Voltage Detection (LVD)

● General purpose input and output

— 35 I/Os support up to 32MHz operating frequency

— Support interrupt vector

● High-precision analog-to-digital converter (Sigma-Delta ADC)

— 24 bit high precision Sigma-Delta ADC

— Support up to 8 external input channels

— Support single-ended, differential input

— 1/2/4/8/16/32/64/128 times selectable gain

— Integral nonlinearity (INL) maximum 30ppm

— ADC channel temperature drift 2ppm/℃

— Output rate 8Hz~8kHz


ENOB≥15.4 bit@8ksps, PGA=128

— Hardware automatically switches ADC channels, automatically polls and reads ADC data, and interrupts to notify MCU or DMA

— Comes with reference voltage, output 1.8/2.35/2.45/2.8V optional

— Integrated temperature sensor/supply voltage detection channel

● Digital Comparator

— Fast-response digital comparator

● LCD Driver

— Integrated 4 COM, 20 SEG configuration

— integrated charge pump

● LED Driver

— Support up to 7 x 8 segments

● Buzzer all the way

● 2 timers

— 4-way 16bit advanced control timer (TIM1), 6-channel PWM output with dead zone and complementary control

— 4-way 16bit general-purpose timer (TIM2), with PWM output

● Programmable constant current source

— 8mA, 10mA, 12mA, 20mA

— Support PWM control

● OLED color screen DMA acceleration module

● Serial Single Wire Debug (SWD)

● Packaging

— LQFP48(7mmx7mm)

— SSOP24(8.2mmx5.3mm)

— QFN48(6mmx6mm)

Application Scenario

● Data collection

● Industrial control

● Medical equipment