Overview
The STM32L412C8U6 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 with high-speed memories, including up to 128 KB of flash memory and 40 KB of SRAM. It also features a Quad SPI flash memory interface and an extensive range of enhanced I/Os and peripherals connected to multiple buses. The device includes several protection mechanisms for embedded flash memory and SRAM, such as readout protection, write protection, and proprietary code readout protection.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memories | 128 KB single bank flash, 40 KB SRAM (including 8 KB with hardware parity check) |
| Analog Peripherals | 2x 12-bit ADC (5 Msps), 1x operational amplifier, 1x ultra-low-power comparator |
| Timers | 1x 32-bit, 4x 16-bit general purpose, 1x 16-bit advanced motor-control, 2x low-power 16-bit timers |
| Communication Interfaces | USB 2.0 full-speed, 3x I2C, 3x USARTs, 1x LPUART, 2x SPIs (and 1x Quad SPI) |
| Power Supply | 1.71 V to 3.6 V (internal LDO), 1.00 to 1.32 V (external SMPS) |
| Temperature Range | -40 °C to +85 °C / +125 °C |
| Power Modes | 300 nA in VBAT mode, 16 nA Shutdown mode, 32 nA Standby mode, 245 nA Standby mode with RTC |
| Package | UFQFPN 48 7x7x0.55 mm |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™)
- High-speed memories: 128 KB flash, 40 KB SRAM
- Quad SPI flash memory interface with XIP capability
- Rich analog peripherals: 2x 12-bit ADC, 1x operational amplifier, 1x ultra-low-power comparator
- Multiple communication interfaces: USB 2.0, I2C, USARTs, LPUART, SPIs
- Low-power modes: VBAT mode, Shutdown mode, Standby mode, Stop 2 mode
- Up to 12 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 STM32L412C8U6 is suitable for a wide range of applications that require high performance and low power consumption. These include:
- Industrial automation and control systems
- Medical devices requiring precise analog measurements
- Consumer electronics with touch sensing capabilities
- Automotive systems, especially those requiring high-performance analog and digital control
- IoT devices that need efficient power management and advanced communication interfaces
Q & A
- What is the core architecture of the STM32L412C8U6?
The STM32L412C8U6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What are the memory specifications of the STM32L412C8U6?
The device features 128 KB of single bank flash memory and 40 KB of SRAM, including 8 KB with hardware parity check.
- What are the key analog peripherals available on the STM32L412C8U6?
The device includes 2x 12-bit ADCs, 1x operational amplifier, and 1x ultra-low-power comparator.
- What communication interfaces are supported by the STM32L412C8U6?
The device supports USB 2.0 full-speed, 3x I2C, 3x USARTs, 1x LPUART, and 2x SPIs (including 1x Quad SPI).
- What are the power supply and temperature range specifications of the STM32L412C8U6?
The device operates from a 1.71 V to 3.6 V power supply and has a temperature range of -40 °C to +85 °C / +125 °C.
- What are the low-power modes available on the STM32L412C8U6?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode, among others.
- Does the STM32L412C8U6 support capacitive sensing?
Yes, the device supports up to 12 capacitive sensing channels.
- What development tools and interfaces are available for the STM32L412C8U6?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
- Is the STM32L412C8U6 RoHS compliant?
Yes, the device is RoHS compliant and comes in ECOPACK2 compliant packages.
- What is the typical current consumption in different power modes?
The device consumes 300 nA in VBAT mode, 16 nA in Shutdown mode, 32 nA in Standby mode, and 245 nA in Standby mode with RTC.
