Overview
The STM32L451CEU6TR is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This device operates at a frequency of up to 80 MHz and features a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types. It also includes a full set of DSP instructions and a memory protection unit (MPU) to enhance application security.
The STM32L451CEU6TR is designed for low-power applications, offering various power-saving modes such as VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode. It supports a wide temperature range of -40 °C to 85/125 °C and operates from a 1.71 to 3.6 V power supply.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memories | Up to 512 KB Flash, 160 KB SRAM (including 32 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/125 °C |
| Power Consumption | 145 nA in VBAT mode, 22 nA in Shutdown mode, 106 nA in Standby mode, 2.05 µA in Stop 2 mode |
| Timers | 1x 32-bit, 3x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers |
| Analog Peripherals | 1x 12-bit ADC (5 Msps), 1x 12-bit DAC, 1x operational amplifier, 2x ultra-low-power comparators |
| Communication Interfaces | 4x I2C, 3x SPI, 3x USART, 1x UART, 1x LPUART, 1x SAI, 1x SDMMC, 1x CAN (2.0B Active) |
| Package | UFQFPN 48 (7x7x0.55 mm) |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU and Adaptive real-time accelerator (ART Accelerator™)
- Up to 512 KB Flash memory and 160 KB SRAM
- Quad SPI Flash memory interface
- Rich analog peripherals including 12-bit ADC, 12-bit DAC, operational amplifier, and ultra-low-power comparators
- Extensive range of communication interfaces (I2C, SPI, USART, UART, LPUART, SAI, SDMMC, CAN)
- Low-power modes: VBAT mode, Shutdown mode, Standby mode, Stop 2 mode
- Fast wakeup from Stop mode (4 µs)
- Brown out reset (BOR) and interconnect matrix
- Up to 21 capacitive sensing channels
- 14-channel DMA controller and true random number generator
Applications
The STM32L451CEU6TR is suitable for a wide range of low-power applications, including:
- IoT devices and smart sensors
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics requiring low power consumption
- Automotive systems and telematics
- Wearable devices and fitness trackers
Q & A
- What is the core architecture of the STM32L451CEU6TR?
The STM32L451CEU6TR is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the operating temperature range of the STM32L451CEU6TR?
The device operates in the -40 °C to 85/125 °C temperature range.
- What are the power consumption modes available in the STM32L451CEU6TR?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode for low-power consumption.
- What types of timers are available on the STM32L451CEU6TR?
The device includes 1x 32-bit timer, 3x 16-bit general-purpose timers, 2x 16-bit basic timers, and 2x low-power 16-bit timers.
- What analog peripherals are included in the STM32L451CEU6TR?
The device features a 12-bit ADC, a 12-bit DAC, an operational amplifier, and two ultra-low-power comparators.
- What communication interfaces are supported by the STM32L451CEU6TR?
The device supports I2C, SPI, USART, UART, LPUART, SAI, SDMMC, and CAN (2.0B Active) interfaces.
- How many capacitive sensing channels does the STM32L451CEU6TR support?
The device supports up to 21 capacitive sensing channels.
- What is the package type of the STM32L451CEU6TR?
The device is available in a UFQFPN 48 (7x7x0.55 mm) package.
- Does the STM32L451CEU6TR support DMA?
Yes, the device includes a 14-channel DMA controller.
- What is the purpose of the Adaptive real-time accelerator (ART Accelerator™) in the STM32L451CEU6TR?
The ART Accelerator™ allows 0-wait-state execution from Flash memory, enhancing performance.
