Overview
The STM32L071RBT7 is an ultra-low-power microcontroller from STMicroelectronics, part of the STM32L071xx family. It incorporates the high-performance Arm Cortex-M0+ 32-bit RISC core, operating at a frequency of up to 32 MHz. This microcontroller is designed for high power efficiency and features a wide range of enhanced I/Os and peripherals. It is suitable for a variety of low-power applications due to its comprehensive set of power-saving modes and low current consumption in various operating modes.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm 32-bit Cortex-M0+ with MPU |
| Operating Frequency | Up to 32 MHz |
| Flash Memory | Up to 192 Kbytes with ECC (2 banks with read-while-write capability) |
| RAM | 20 Kbytes |
| Data EEPROM | 6 Kbytes with ECC |
| Backup Register | 20 bytes |
| Power Supply | 1.65 V to 3.6 V |
| Temperature Range | -40 to 125 °C |
| Low-Power Modes | Standby: 0.29 µA, Stop: 0.43 µA, Stop + RTC + RAM retention: 0.86 µA |
| Wakeup Time | 5 µs from Flash memory |
| ADC Conversion | 41 µA at 10 ksps |
| I/Os | Up to 84 fast I/Os (78 I/Os 5V tolerant) |
| Communication Interfaces | Up to 3 I2Cs, 2 SPIs, 1 I2S, 4 USARTs, 1 low-power UART |
| Timers | 11 timers including 16-bit and ultra-low-power timers, RTC, and watchdogs |
| Package | LQFP 64 10x10x1.4 mm |
Key Features
- Ultra-low-power platform: Optimized for low power consumption with various power-saving modes.
- Rich Analog Peripherals: Includes a 12-bit ADC with hardware oversampling, ultra-low-power comparators, and multiple timers.
- Advanced Communication Interfaces: Supports up to three I2Cs, two SPIs, one I2S, four USARTs, and a low-power UART.
- High-Speed I/Os: Up to 84 fast I/Os with 78 I/Os being 5V tolerant.
- Reset and Supply Management: Features ultra-safe, low-power BOR, ultra-low-power POR/PDR, and programmable voltage detector (PVD).
- Clock Sources: Includes multiple internal and external clock sources such as crystal oscillators, internal RC oscillators, and PLL for CPU clock.
- Development Support: Supports serial wire debug and pre-programmed bootloader.
Applications
- IoT Devices: Suitable for Internet of Things applications requiring low power consumption.
- Industrial Automation: Can be used in industrial automation systems where low power and high reliability are crucial.
- Medical Devices: Ideal for medical devices that require low power and precise analog capabilities.
- Consumer Electronics: Used in various consumer electronics such as smart home devices, wearables, and other portable electronics.
- Automotive Systems: Can be integrated into automotive systems that demand low power and robust performance.
Q & A
- What is the core architecture of the STM32L071RBT7?
The STM32L071RBT7 is based on the Arm 32-bit Cortex-M0+ core with a memory protection unit (MPU).
- What is the operating voltage range of the STM32L071RBT7?
The operating voltage range is from 1.65 V to 3.6 V.
- What are the low-power modes available in the STM32L071RBT7?
The device supports Standby, Stop, and Stop + RTC + RAM retention modes with current consumptions of 0.29 µA, 0.43 µA, and 0.86 µA respectively.
- How many I/Os does the STM32L071RBT7 have?
The device has up to 84 fast I/Os, with 78 I/Os being 5V tolerant.
- What communication interfaces are supported by the STM32L071RBT7?
The device supports up to three I2Cs, two SPIs, one I2S, four USARTs, and one low-power UART.
- What is the temperature range for the STM32L071RBT7?
The operating temperature range is from -40 to 125 °C.
- Does the STM32L071RBT7 have any built-in timers?
Yes, it includes 11 timers, including 16-bit and ultra-low-power timers, an RTC, and two watchdogs.
- What is the package type for the STM32L071RBT7?
The device is available in an LQFP 64 10x10x1.4 mm package.
- Does the STM32L071RBT7 support serial wire debug?
Yes, it supports serial wire debug for development purposes.
- What is the typical current consumption during ADC conversion?
The typical current consumption during ADC conversion at 10 ksps is 41 µA.
- Is the STM32L071RBT7 RoHS compliant?
Yes, the device is RoHS compliant and comes in ECOPACK2 packages.
