STMicroelectronics : Low-cost, low-power STM32L053 MCU with ARM Cortex- M0+ core offers USB2.0 connectivity


STM32L053: can drive eight multiplexed displays

The STM32L053 microcontroller from STMicroelectronics offers very high power efficiency thanks to a large choice of internal and external clock sources, an internal voltage-adaptation scheme and several low-power modes. The STM32L053 is based on the low-power ARM® Cortex®-M0+ 32-bit RISC core operating at a frequency of 32MHz.

The STM32L053 features a crystal-less USB2.0 interface. It also includes a memory protection unit and high-speed Flash programme memory, 2kbytes of EEPROM data memory and 8kbytes of RAM.

Four variants of the STM32L053 are available: the STM32L053C6 (32kbytes of Flash) and STM32L053C8 (64kbytes) are housed in a 48-pin LQFP package and contain a 10-channel 12-bit ADC. The STM32L053R6 (32kbytes of Flash) and STM32L053R8 (64kbytes) are housed in 64-pin LQFP or TFBGA packages and contain a 16-channel 12-bit ADC.

All the devices offer several analogue features, including a DAC, two ultra low-power comparators, several timers, and a real-time clock and a SysTick, which can be used as time bases.

They also feature two watchdogs: one watchdog has an independent clock and window capability, and one window watchdog is based on the bus clock.

An integrated LCD controller has a built-in LCD voltage generator which can drive as many as eight multiplexed LCDs, with contrast independent of the supply voltage.


  • One or two I2C interfaces
  • Two SPI interfaces
  • One I2S interface
  • Two USART interfaces
  • Up to 24 capacitive-sensing channels


  • Utility meters
  • Industrial sensors
  • Healthcare and fitness equipment
  • Remote controls
  • PC peripherals
  • GPS equipment
  • Alarm systems

ST’s TSX711

Based on an STM32L053C8T6 MCU, the STM32L053 Discovery kit includes an ST-LINK/V2-1 embedded debug tool interface, linear touch sensor, touch keys, current measurement function, 2” e-paper display, NFC connector, LEDs, push-buttons and a USB mini-B connector.
Orderable Part Number: STM32L0538-DISCO