Overview
The STM32L412CBU6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This MCU operates at a frequency of up to 80 MHz and includes a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types. It also features a full set of DSP instructions and a Memory Protection Unit (MPU) to enhance application security.
The device is part of the STM32L412xx family, which is known for its ultra-low-power consumption and advanced power-saving modes, making it ideal for low-power applications. It supports a wide range of operating temperatures from -40°C to 85°C (or up to 125°C in certain configurations) and operates on a power supply of 1.71 to 3.6 V.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Flash Memory | Up to 128 KB |
| SRAM | 40 KB (including 8 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V |
| Operating Temperature | -40°C to 85°C (or up to 125°C) |
| ADC | Two 12-bit ADCs, 5 Msps |
| Timers | One 32-bit timer, four 16-bit timers, two 16-bit low-power timers |
| Communication Interfaces | Three I2Cs, two SPIs, three USARTs, one Low-Power UART, USB 2.0 full-speed |
| Package | UFQFPN-48 (7x7 mm) |
| Power Modes | Shutdown, Standby, Stop 2 mode, VBAT mode |
| Current Consumption | 300 nA in VBAT mode, 16 nA in Shutdown mode, 32 nA in Standby mode |
Key Features
- Ultra-low-power with FlexPowerControl, supporting various power-saving modes like Shutdown, Standby, and Stop 2 mode.
- Includes ST state-of-the-art patented technology for enhanced performance and power efficiency.
- Rich analog peripherals including two 12-bit ADCs, one operational amplifier, and one ultra-low-power comparator.
- Extensive range of communication interfaces: three I2Cs, two SPIs, three USARTs, one Low-Power UART, and USB 2.0 full-speed.
- Quad SPI memory interface with XIP capability.
- Independent power supplies for analog components like ADC, OPAMP, and comparator.
- VBAT input for RTC and backup registers.
- Advanced motor control timers and capacitive sensing channels.
Applications
- IoT devices requiring low power consumption.
- Industrial automation and control systems.
- Medical devices that need precise analog measurements.
- Consumer electronics focusing on energy efficiency.
- Automotive systems, especially those requiring advanced motor control.
- Sensor-based applications leveraging the capacitive sensing channels.
Q & A
- What is the core architecture of the STM32L412CBU6?
The STM32L412CBU6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU), operating at up to 80 MHz.
- What is the memory configuration of the STM32L412CBU6?
The device has up to 128 KB of flash memory and 40 KB of SRAM, including 8 KB with hardware parity check.
- What are the power supply and operating temperature ranges of the STM32L412CBU6?
The power supply range is 1.71 V to 3.6 V, and the operating temperature range is -40°C to 85°C (or up to 125°C in certain configurations).
- What are the key analog peripherals of the STM32L412CBU6?
The device includes two 12-bit ADCs, one operational amplifier, and one ultra-low-power comparator.
- What communication interfaces are available on the STM32L412CBU6?
The device features three I2Cs, two SPIs, three USARTs, one Low-Power UART, and a USB 2.0 full-speed interface.
- What are the power-saving modes supported by the STM32L412CBU6?
The device supports Shutdown, Standby, Stop 2 mode, and VBAT mode for low-power operation.
- What is the typical current consumption in different power modes?
The current consumption is 300 nA in VBAT mode, 16 nA in Shutdown mode, and 32 nA in Standby mode.
- Does the STM32L412CBU6 support independent power supplies for analog components?
- What is the purpose of the VBAT input on the STM32L412CBU6?
The VBAT input is used to backup the RTC and backup registers.
- What are some typical applications of the STM32L412CBU6?
The device is suitable for IoT devices, industrial automation, medical devices, consumer electronics, automotive systems, and sensor-based applications.
