Overview
The STM32L451RET6 is an ultra-low-power microcontroller from STMicroelectronics, part of the STM32L4 series. It is based on the high-performance Arm® Cortex®-M4 32-bit RISC core, operating at a frequency of up to 80 MHz. This microcontroller is designed for low-power applications 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.
Key Specifications
| Attribute | Value |
|---|---|
| Family Name | STM32L4 |
| Package Type | LQFP |
| Mounting Type | Surface Mount |
| Pin Count | 64 |
| Device Core | ARM Cortex M4 |
| Data Bus Width | 32-bit |
| Program Memory Size | 512 kB |
| Maximum Frequency | 80 MHz |
| RAM Size | 160 kB |
| Number of PWM Units | 1 x 16 bit |
| Number of SPI Channels | 3 |
| Number of CAN Channels | 1 |
| Number of USART Channels | 3 |
| Number of UART Channels | 2 |
| Typical Operating Supply Voltage | 1.71 to 3.6 V |
| Number of I2C Channels | 4 |
| ADCs | 16 x 12 bit |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | +85 °C |
| Dimensions | 10 x 10 x 1.45 mm |
Key Features
- Ultra-low-power consumption with various power-saving modes, including VBAT mode for RTC and backup registers, and low-power timers available in Stop mode.
- High-performance Arm® Cortex®-M4 32-bit RISC core with FPU, supporting all Arm® single-precision data-processing instructions and data types, and a full set of DSP instructions.
- High-speed memories: up to 512 Kbyte of Flash memory and 160 Kbyte of SRAM, along with a Quad SPI Flash memories interface.
- Extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix.
- Analog peripherals include a fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, one DAC channel, and an internal voltage reference buffer.
- Communication interfaces: four I2Cs, three SPIs, three USARTs, one UART, one Low-Power UART, one SAI, one SDMMC, and one CAN (2.0).
- Up to 21 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors.
- Multiple timers: one 32-bit timer, one 16-bit PWM timer for motor control, four general-purpose 16-bit timers, and two 16-bit low-power timers).
- RTC with hardware calendar, alarms, and calibration, along with a VBAT input for backup).
Applications
- Low-power IoT devices and smart sensors due to its ultra-low-power consumption and extensive power-saving modes).
- Industrial automation and control systems, leveraging its advanced motor control timers and CAN interface).
- Medical devices requiring precise analog measurements and low power consumption, utilizing its high-performance ADC and DAC).
- Consumer electronics such as wearables and portable devices, benefiting from its compact package options and low power features).
- Automotive systems, particularly those requiring robust communication interfaces and high reliability).
Q & A
- What is the core architecture of the STM32L451RET6?
The STM32L451RET6 is based on the Arm® Cortex®-M4 32-bit RISC core with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L451RET6?
The maximum operating frequency is up to 80 MHz.
- What are the power supply voltage ranges for the STM32L451RET6?
The device operates from a 1.71 to 3.6 V power supply.
- What are the temperature ranges for the STM32L451RET6?
The device operates in the -40 to +85 °C (and up to +125 °C junction) temperature range.
- What types of memory does the STM32L451RET6 have?
The device has up to 512 Kbyte of Flash memory and 160 Kbyte of SRAM, along with a Quad SPI Flash memories interface.
- What analog peripherals are available on the STM32L451RET6?
The device includes a fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, one DAC channel, and an internal voltage reference buffer.
- What communication interfaces are supported by the STM32L451RET6?
The device supports four I2Cs, three SPIs, three USARTs, one UART, one Low-Power UART, one SAI, one SDMMC, and one CAN (2.0).
- Does the STM32L451RET6 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels for touchkey, linear, and rotary touch sensors.
- What are the power-saving features of the STM32L451RET6?
The device features various power-saving modes, including VBAT mode for RTC and backup registers, and low-power timers available in Stop mode.
- What package options are available for the STM32L451RET6?
The device is available in several package options, including LQFP 64-pin, UFBGA 64-pin, and WLCSP 64-pin.
