STM32L151C8U6TR

The STM32L151C8U6TR microcontroller is part of the STM32L151 family that operates at a maximum frequency of 32 MHz and features a Cortex-M3 core. The microcontroller is able to integrate up to 256 Kbytes of Flash memory, up to 40 Kbytes RAM, up to 14 Kbytes CupptROM and an extensive range of peripherals. It is optimized for low-power embedded applications with an ultra-low-power consumption: as low as 2.2 µA in Stop mode and a Sleep mode current of less than 10 µA.

The STM32L151C8U6TR microcontroller includes a wide range of advanced analog functions and peripherals to support a variety of application fields: automotive, consumer, industrial, medical, including all sensor and RF requirements. The device also incorporates secure/safety features, including AES128/192/256 encryption, to address advanced systems in secure/safety applications, such as access control and authentication, grid and building automation, smart metering and healthcare systems.

The STM32L151C8U6TR mainly features a Cortex-M3 core, with a DMA unit, a LCD controller and an on-board voltage regulator which allows for the direct connection of an external supply. It also provides a set of peripherals and advanced features, such as general-purpose 16-bit timers, 12-bit analog-to-digital converter (ADC), a USB 2.0 full-speed interface and a variety of communication interfaces, including 3 SPI/I2C, USART/LIN, CAN and IrDA. The device is also compatible with a variety of external memory interfaces, including a 20-bit Flexible Memory Interface (FSI), an 8-bit Flexible Memory Interface (FSI), a 4-bit Serial or an 8-bit Parallel Memory Interface (PMI).

The working principle of the STM32L151C8U6TR microcontroller mainly consists of a core, a bus unit and a power supply. Both the general-purpose and specialized peripherals are connected to the bus interface and the power supply provides voltage from the external power source. The core is connected to the peripheral and to the memory interface, to the on-chip OTP memory and to the clock system. It is responsible for the general operations of the microcontroller, such as signal and data processing, instruction execution and peripheral management.

The general-purpose peripherals mainly allow for communication, data conversion and signal generation, while the specialized peripherals are specific to the application and consist of analog-to-digital conversion, signal generation, communication interfaces and power-saving modes. The internal memory interface permits the software to read and write to and from internal and external memory. The on-chip OTP memory stores the controller specific settings of the chip and finally, the clock system uses an internal RC oscillator or an external clock source to generate the frequency of the internal clock.

In conclusion, the STM32L151C8U6TR microcontroller is a low-power, high-performance embedded microcontroller with a wide range of peripherals and advanced features. It is suitable for automotive, consumer, industrial and medical applications, with secure/safety features included, such as AES encryption. It mainly consists of a core, a bus unit and a power supply, as well as general-purpose and specialized peripherals, an internal memory interface, an on-chip OTP memory and a clock system.