Description

The STM32L152R8 is an electronic component in the microcontroller category. It is built with the ultra-low-power STM32L15xxx series, which combines the power of the universal serial bus (USB) with the high-performance ARM Cortex-M3 32-bit RISC core operating at a 32 MHz frequency. It features a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 128 Kbytes and RAM up to 16 Kbytes), and a wide range of enhanced I/Os and peripherals connected to two APB buses.

Some of the key features of the STM32L152R8 include a 12-bit ADC, 2 DACs, and 2 ultra-low-power comparators. It also has six general-purpose 16-bit timers and two basic timers, which can be used as time bases. The device offers standard and advanced communication interfaces, including up to two I2Cs and SPIs, three USARTs, and a USB. It is equipped with up to 20 capacitive sensing channels to easily add touch sensing functionality to any application. Additionally, it includes a real-time clock and a set of backup registers that remain powered in Standby mode.

The STM32L152R8 operates from a 1.8 to 3.6V power supply (down to 1.65V at power down) with BOR and from a 1.65 to 3.6V power supply without BOR option. It has a comprehensive set of power-saving modes, making it suitable for low-power applications. The device also features an integrated LCD controller with a built-in LCD voltage generator, capable of driving up to 8 multiplexed LCDs with contrast independent of the supply voltage.

Specifications and features

Some of the specifications and features of the STM32L152R8 include:

• Ultra-low-power platform with a power supply range of 1.65V to 3.6V
• Wide operating temperature range of -40°C to +85°C (extendable to 105°C in low power dissipation state)
• Various power-saving modes, including Standby mode (0.3µA with 3 wakeup pins), Stop mode (0.57µA with 16 wakeup lines), and Low-power Run mode (9µA)
• ARM 32-bit Cortex-M3 CPU with a maximum frequency of 32 MHz and a peak performance of 33.3 DMIPS
• Memory protection unit for enhanced security
• Reset and supply management features, including a low-power brownout reset (BOR) with selectable thresholds and a programmable voltage detector (PVD)
• Various clock sources, such as crystal oscillators, internal RC oscillators, and PLL
• Up to 128KB Flash memory with ECC, up to 16KB RAM, and up to 4KB true EEPROM with ECC
• LCD Driver for up to 8x40 segments, with contrast adjustment and blinking mode support
• Rich analog peripherals, including a 12-bit ADC, 2 DACs, and 2 ultra-low-power comparators
• DMA controller with 7 channels for efficient data transfer
• Various communication interfaces, such as USB 2.0, USART, SPI, and I2C
• 10 timers, including 6 16-bit timers with IC/OC/PWM channels and 2 watchdog timers
• Up to 20 capacitive sensing channels for touchkey, linear, and rotary touch sensors
• CRC calculation unit and 96-bit unique ID

Application Scenarios

The STM32L152R8 is suitable for various application scenarios that require low power consumption and advanced features. Some potential use cases for this microcontroller include:

• IoT devices
• Battery-powered applications
• Sensor networks
• Home automation systems
• Industrial control systems
• Medical devices
• Wearable technology

Comparison

• Ultra-low-power platform, making it ideal for battery-powered applications
• Wide operating temperature range, suitable for various environments
• Wide range of power-saving modes for efficient energy management
• High-performance ARM Cortex-M3 processor
• Memory protection unit for enhanced security
• Integrated LCD controller with built-in voltage generator for driving multiplexed LCDs
• Rich analog peripherals for versatile analog signal processing
• Multiple communication interfaces for easy integration with other devices
• Capacitive sensing channels for touch sensing functionality
• Various timers for precise timing and event management

• Slightly higher power consumption compared to some ultra-low-power microcontrollers
• Limited Flash memory capacity compared to some other models
• May require additional external components for specific application requirements