Overview
The STM32L476MGY6TR is an ultra-low-power microcontroller from STMicroelectronics, part of the STM32L476xx family. It is based on the high-performance Arm Cortex-M4 32-bit RISC core, operating at frequencies up to 80 MHz. This microcontroller features a Floating Point Unit (FPU) that supports all Arm single-precision data-processing instructions and includes a full set of DSP instructions and a Memory Protection Unit (MPU) for enhanced application security.
The device is designed for low-power applications, offering various power-saving modes and a wide range of peripherals and interfaces. It is suitable for applications requiring high performance, low power consumption, and advanced features such as capacitive sensing, LCD driving, and multiple communication interfaces.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm Cortex-M4 32-bit RISC core with FPU, up to 80 MHz |
| Memory | Up to 1 MB flash, up to 128 KB SRAM |
| Power Supply | 1.71 V to 3.6 V (internal LDO), 1.05 to 1.32 V (external SMPS) |
| Temperature Range | -40 °C to +85 °C / +105 °C / +125 °C |
| ADCs | Up to 3 fast 12-bit ADCs (5 Msps) |
| DACs | 2x 12-bit DAC output channels |
| Timers | 16x timers: 2x 16-bit advanced motor-control, 2x 32-bit, 5x 16-bit general purpose, etc. |
| Communication Interfaces | USB OTG 2.0 full-speed, 3x I2C, 3x SPI, 5x USART, CAN, SDMMC, etc. |
| Capacitive Sensing | Up to 24 capacitive sensing channels |
| Package | WLCSP 81 3.8x4.4x0.6 P 0.4 mm |
Key Features
- Ultra-low-power with FlexPowerControl and multiple power-saving modes (e.g., 300 nA in VBAT mode, 30 nA Shutdown mode, 120 nA Standby mode)
- RTC with HW calendar, alarms, and calibration
- LCD driver 8x40 or 4x44 with internal step-up converter
- Up to 24 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors
- Rich analog peripherals including 3x 12-bit ADCs, 2x 12-bit DACs, 2x operational amplifiers, and 2x ultra-low-power comparators
- 20x communication interfaces including USB OTG, I2C, SPI, USART, CAN, and SDMMC
- 14-channel DMA controller, true random number generator, and CRC calculation unit
- Development support with serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™
- All packages are ECOPACK2 compliant
Applications
The STM32L476MGY6TR is versatile and can be used in a variety of applications, including:
- Personal electronics such as smartwatches, fitness trackers, and mobile devices
- Industrial automation and control systems
- Medical devices requiring low power consumption and high performance
- Automotive systems, especially those needing advanced communication interfaces and low power modes
- IoT devices that require efficient power management and multiple peripherals
Q & A
- What is the core architecture of the STM32L476MGY6TR?
The STM32L476MGY6TR is based on the Arm Cortex-M4 32-bit RISC core with a Floating Point Unit (FPU), operating at frequencies up to 80 MHz.
- What are the power supply ranges for this microcontroller?
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 supply.
- What are the key analog peripherals available on this microcontroller?
The device includes 3x 12-bit ADCs, 2x 12-bit DACs, 2x operational amplifiers, and 2x ultra-low-power comparators.
- What communication interfaces are supported by the STM32L476MGY6TR?
The microcontroller supports USB OTG 2.0 full-speed, 3x I2C, 3x SPI, 5x USART, CAN, SDMMC, and other interfaces.
- What is the temperature range for the STM32L476MGY6TR?
The device operates in the -40 °C to +85 °C / +105 °C / +125 °C temperature range.
- What are the power-saving modes available on this microcontroller?
The device offers several power-saving modes including VBAT mode, Shutdown mode, Standby mode, Stop 2 mode, and others.
- Does the STM32L476MGY6TR support capacitive sensing?
Yes, it supports up to 24 capacitive sensing channels for touchkey, linear, and rotary touch sensors.
- What development tools are available for this microcontroller?
Development support includes serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
- Is the STM32L476MGY6TR environmentally friendly?
Yes, all packages are ECOPACK2 compliant.
- What is the typical current consumption in run mode?
The device consumes 100 µA/MHz in LDO Mode and 39 μA/MHz in SMPS Mode at 3.3 V.
