Document
STM32L412xx
Ultra-low-power Arm® Cortex®-M4 32-bit MCU+FPU, 100DMIPS, up to 128KB flash, 40KB SRAM, analog, ext. SMPS
Datasheet - production data
Features
Includes ST state-of-the-art patented technology
• 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
• 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%)
LQFP32 (7x7 mm) UFBGA64 (5x5 mm) UFQFPN32 (5x5 mm)
LQFP48 (7x7 mm)
UFQFPN48 (7x7 mm)
WLCSP36 (2.6x3.1 mm)
LQFP64 (10x10 mm)
– 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
• Up to 52 fast I/Os, most 5 V-tolerant
• RTC with HW calendar, alarms and calibration
• Up to 12 capacitive sensing channels: support touchkey, linear and rotary touch sensors
• 10x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 2x 16-bit general purpose, 1x 16bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
• Memories – 128 KB single bank flash, proprietary code readout protection – 40 KB of SRAM including 8 KB with hardware parity check – Quad SPI memory interface with XIP capability
• Rich analog peripherals (independent supply) – 2x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 µA/Msps – 1x operational amplifier with built-in PGA – 1x ultra-low-power comparator
• 12x communication interfaces – USB 2.0 full-speed crystal less solution with LPM and BCD – 3x I2C FM+(1 Mbit/s), SMBus/PMBus – 3x USARTs (ISO 7816, LIN, IrDA, modem) – 1x LPUART (Stop 2 wake-up) – 2x SPIs (and 1x Quad SPI) – IRTIM (Infrared interface)
December 2022
This is information on a product in full production.
DS12469 Rev 9
1/198
www.st.com
STM32L412xx
• 14-channel DMA controller
• Development support: serial wire debug
• True random number generator
(SWD), JTAG, Embedded Trace Macrocell™
• CRC calculation unit, 96-bit unique ID
• All packages are ECOPACK2 compliant
Table 1. Device summary
Reference
Part numbers
STM32L412xx
STM32L412CB, STM32L412KB, STM32L412RB, STM32L412TB STM32L412C8, STM32L412K8, STM32L412R8, STM32L412T8
2/198
DS12469 Rev 9
STM32L412xx
Contents
Contents
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3
Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1 Arm® Cortex®-M4 core with FPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Adaptive real-time memory accelerator (ART Accelerator™) . . . . . . . . . 16
3.3 Memory protection unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.4 Embedded flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5 Embedded SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6 Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.7 Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.8 Cyclic redundancy check calculation unit (CRC) . . . . . . . . . . . . . . . . . . . 19
3.9 Power supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.9.1 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.9.2 Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.9.3 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.9.4 Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.9.5 Reset mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..