STM32L412RBT6P Description

The STM32L412RBT6P device is an ultra-low-power microcontroller built around the powerful 32-bit RISC Arm? Cortex?-M4 core that can operate at up to 80 MHz. A floating point unit (FPU) single precision is a characteristic of the Cortex-M4 core that supports all Arm? single-precision data-processing instructions and data formats. Additionally, it incorporates a memory protection unit (MPU) that improves program security together with the whole range of DSP instructions.

A wide variety of enhanced I/Os and peripherals connected to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix are included in the STM32L412RBT6P device, along with high-speed memories (Flash memory up to 128 Kbyte, 40 Kbyte of SRAM), a Quad SPI flash memories interface (available on all packages), and these features.

The STM32L412RBT6P device includes a number of readout protection, write protection, proprietary code readout protection, and firewall protection techniques for embedded Flash memory and SRAM.

Two fast 12-bit ADCs (5 Msps), two comparators, one operational amplifier, a low-power RTC, a general-purpose 32-bit timer, and a motor control-specific 16-bit PWM timer, four general-purpose 16-bit timers, and two 16-bit low-power timers are all included in the devices. Furthermore, there are up to 12 capacitive sensing channels available.

They also have both conventional and cutting-edge communication interfaces.

STM32L412RBT6P Features

• Performance benchmark

– 1.25 DMIPS/MHz (Drystone 2.1)

– 273.55 CoreMark? (3.42 CoreMark/MHz @80 MHz)

• Energy benchmark

– 442 ULPMark-CP?

– 165 ULPMark-PP?

• Clock Sources

– 4 to 48 MHz crystal oscillator

– 32 kHz crystal oscillator for RTC (LSE)

– Internal 16 MHz factory-trimmed RC (±1%)

– Internal low-power 32 kHz RC (±5%)

– Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy)

– Internal 48 MHz with clock recovery

– PLL for system clock

• Ultra-low-power with FlexPowerControl

– 1.71 V to 3.6 V power supply

– -40 °C to 85/125 °C temperature range

– 300 nA in VBAT mode: supply for RTC and 32x32-bit backup registers

– 16 nA Shutdown mode (4 wakeup pins)

– 32 nA Standby mode (4 wakeup pins)

– 245 nA Standby mode with RTC

– 0.7 μA Stop 2 mode, 0.95 μA with RTC

– 79 μA/MHz run mode (LDO Mode)

– 28 μA/MHz run mode (@3.3 V SMPS Mode)

– Batch acquisition mode (BAM)

– 4 μs wakeup from Stop mode

– Brown out reset (BOR)

– Interconnect matrix

• Core: Arm? 32-bit Cortex?-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator?) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS and DSP instructions

STM32L412RBT6P Applications

• Analog independent supply input for ADC

• OPAMP

• Comparator

• Circuits

• Light sensing & controlling devices

• Temperature sensing and control devices

• Fire detection & safety devices