Overview
The STM32L452CEU3 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 STM32L452CEU3 is part of the STM32L452xx family, which is designed for low-power applications. It offers a comprehensive set of power-saving modes, including VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode, making it suitable for battery-powered devices and other low-power applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Flash Memory | Up to 512 KB single bank Flash, proprietary code readout protection |
| SRAM | 160 KB of SRAM including 32 KB with hardware parity check |
| Power Supply | 1.71 V to 3.6 V (internal LDO regulator), 1.05 to 1.32 V (external SMPS) |
| Temperature Range | -40 °C to 85 °C / 125 °C |
| Timers | 1x 32-bit, 5x 16-bit (including 1 advanced motor-control timer), 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 | USB 2.0 full-speed, 4x I2C, 3x SPI, 3x USART, 1x UART, 1x LPUART, CAN (2.0B Active), SDMMC |
| Capacitive Sensing Channels | Up to 21 channels |
| Package | UFQFPN 48 7x7x0.55 mm |
Key Features
- Ultra-low-power with FlexPowerControl, including multiple power-saving modes (VBAT, Shutdown, Standby, Stop 2)
- High-performance Arm® Cortex®-M4 core with FPU and DSP instructions
- Memory Protection Unit (MPU) for enhanced security
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, ultra-low-power comparators
- Extensive communication interfaces: USB, I2C, SPI, USART, UART, LPUART, CAN, SDMMC
- Up to 21 capacitive sensing channels for touchkey, linear, and rotary touch sensors
- Multiple timers: 1x 32-bit, 5x 16-bit, including advanced motor-control and low-power timers
- True random number generator, CRC calculation unit, and 96-bit unique ID
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
- All packages are ECOPACK2® compliant
Applications
The STM32L452CEU3 is suitable for a wide range of applications that require low power consumption and high performance. These include:
- Battery-powered devices such as wearables, smart meters, and IoT devices
- Industrial automation and control systems
- Medical devices requiring low power and high precision
- Automotive systems, especially those needing low-power modes
- Consumer electronics, such as smart home devices and energy-efficient appliances
Q & A
- What is the core architecture of the STM32L452CEU3?
The STM32L452CEU3 is based on the Arm® Cortex®-M4 32-bit RISC core with a Floating Point Unit (FPU).
- What are the power supply ranges for the STM32L452CEU3?
The device operates from a 1.71 V to 3.6 V power supply using the internal LDO regulator, and from 1.05 to 1.32 V using an external SMPS.
- What are the key power-saving modes of the STM32L452CEU3?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode, among others.
- What types of timers are available on the STM32L452CEU3?
The device includes 1x 32-bit timer, 5x 16-bit timers (including 1 advanced motor-control timer), and 2x low-power 16-bit timers.
- What analog peripherals are included in the STM32L452CEU3?
The device features a 12-bit ADC, a 12-bit DAC, an operational amplifier, and two ultra-low-power comparators.
- What communication interfaces are available on the STM32L452CEU3?
The device includes USB 2.0 full-speed, four I2C interfaces, three SPI interfaces, three USART interfaces, one UART, one LPUART, CAN (2.0B Active), and SDMMC.
- How many capacitive sensing channels does the STM32L452CEU3 support?
The device supports up to 21 capacitive sensing channels.
- What is the package type for the STM32L452CEU3?
The device is available in a UFQFPN 48 7x7x0.55 mm package.
- Is the STM32L452CEU3 compliant with any environmental standards?
Yes, all packages are ECOPACK2® compliant.
- What development tools are supported for the STM32L452CEU3?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
- What is the temperature range for the STM32L452CEU3?
The device operates in the -40 °C to 85 °C / 125 °C temperature range.
