STM8L151C6T6
STM8L151C6T6 - 8-bit Ultra-Low-Power MCU, 32KB Flash | STMicroelectronics
The STM8L151C6T6 is an 8-bit ultra-low-power microcontroller from STMicroelectronics' STM8L EnergyLite family, featuring a 16 MHz STM8 core, 32 KB of Flash memory, 2 KB of RAM, and 1 KB of data EEPROM. Housed in a 48-pin LQFP (7x7 mm) package, this MCU is designed for energy-sensitive applications requiring long battery life and high integration.
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data bus, integrating a processor core, memory, and programmable peripherals. The STM8L151C6T6 belongs to the STM8L ultra-low-power family, which is optimized for applications where power consumption is critical, such as portable medical devices, smart sensors, and industrial monitoring. As a member of the STM8L series, it balances processing capability with energy efficiency, making it a key component in the power management hierarchy of embedded systems.
Key features include an operating power supply range of 1.8V to 3.6V, multiple low-power modes (Wait, Low-power Run, Low-power Wait, Active-halt, and Halt), and a rich set of peripherals: USART, I2C, SPI, 12-bit ADC, 12-bit DAC, comparators, timers, and an RTC. The device also supports an LCD driver (on STM8L152 variants) and offers up to 41 I/O pins. Its ultra-low-power design achieves typical current consumption as low as 0.3 µA in Halt mode, making it ideal for battery-powered applications.
The STM8L151C6T6 is built on ST's proprietary STM8 core architecture, which is designed for high code density and efficient execution. The device includes a flexible clock system with internal and external oscillators, a comprehensive set of timers (including a basic timer, general-purpose timers, and a low-power timer), and a 12-bit ADC with up to 28 channels. The integrated EEPROM allows for data storage without external memory, simplifying system design and reducing BOM cost.
Typical applications include portable medical devices (e.g., glucose meters, pulse oximeters), smart sensors for IoT nodes, industrial process control, and battery management systems. The ultra-low-power modes and wide operating voltage range make it particularly suited for devices powered by coin cells or energy harvesting. The rich analog peripherals (ADC, DAC, comparators) enable direct sensor interfacing without external components.
When designing with this MCU, pay attention to the power supply decoupling: place a 100 nF capacitor close to each VDD pin and a 1 µF capacitor at the main power input. For lowest power consumption, use the Halt mode with the RTC running, and configure unused I/Os as analog inputs or outputs to avoid floating inputs. The STM8L151C6T6 is supported by ST's free development tools, including the ST Visual Develop (STVD) IDE and the STM8CubeMX configuration tool, which simplify firmware development and peripheral initialization.
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