Overview
The STM32L451VEI6 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 microcontroller is designed for low-power applications, with a power supply range of 1.71 to 3.6 V and an operating temperature range of -40 to +85 °C (or +125 °C for certain packages). It includes high-speed memories such as up to 512 Kbyte of Flash memory and 160 Kbyte of SRAM, along with a Quad SPI Flash memory interface.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Power Supply | 1.71 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C / +125 °C |
| Flash Memory | Up to 512 KB single bank Flash |
| SRAM | 160 KB, including 32 KB with hardware parity check |
| ADC | 1x 12-bit ADC, 5 Msps, up to 16-bit with hardware oversampling |
| DAC | 1x 12-bit DAC output channel, low-power sample and hold |
| Timers | 1x 32-bit, 3x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers |
| Communication Interfaces | 4x I2C, 3x SPI, 3x USART, 1x UART, 1x LPUART, 1x SAI, 1x SDMMC, 1x CAN |
| Power Modes | 145 nA in VBAT mode, 22 nA Shutdown mode, 106 nA Standby mode, 2.05 µA Stop 2 mode |
| Package Options | UFBGA 100, LQFP 100, and others |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™)
- High-speed memories: up to 512 KB Flash, 160 KB SRAM, Quad SPI Flash memory interface
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, ultra-low-power comparators
- Extensive communication interfaces: I2C, SPI, USART, UART, LPUART, SAI, SDMMC, CAN
- Advanced power-saving modes: VBAT mode, Shutdown mode, Standby mode, Stop 2 mode
- Up to 21 capacitive sensing channels
- True random number generator, CRC calculation unit, 96-bit unique ID
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
Applications
The STM32L451VEI6 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, especially those requiring high reliability and low power
Q & A
- What is the core architecture of the STM32L451VEI6?
The STM32L451VEI6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the power supply range for the STM32L451VEI6?
The power supply range is from 1.71 V to 3.6 V.
- What are the operating temperature ranges for the STM32L451VEI6?
The operating temperature ranges are -40 °C to +85 °C and -40 °C to +125 °C for certain packages.
- How much Flash and SRAM memory does the STM32L451VEI6 have?
The device has up to 512 KB of Flash memory and 160 KB of SRAM.
- What types of communication interfaces are available on the STM32L451VEI6?
The device includes I2C, SPI, USART, UART, LPUART, SAI, SDMMC, and CAN interfaces.
- What are the power-saving modes available on the STM32L451VEI6?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode among others.
- Does the STM32L451VEI6 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What development tools are supported by the STM32L451VEI6?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
- Is the STM32L451VEI6 compliant with any environmental standards?
Yes, all packages are ECOPACK2® compliant.
- What is the purpose of the Adaptive real-time accelerator (ART Accelerator™) in the STM32L451VEI6?
The ART Accelerator™ allows 0-wait-state execution from Flash memory.
