Document
STM32L433xx
Ultra-low-power Arm® Cortex®-M4 32-bit MCU+FPU, 100DMIPS, up to 256KB flash, 64KB SRAM, USB FS, LCD, 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 85/105/125 °C temperature range – 200 nA in VBAT mode: supply for RTC and 32x32-bit backup registers – 8 nA Shutdown mode (5 wakeup pins) – 28 nA Standby mode (5 wakeup pins) – 280 nA Standby mode with RTC – 1.0 µA Stop 2 mode, 1.28 µA with RTC – 84 µA/MHz run mode (LDO Mode) – 36 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 – 347 ULPMark™ CP score – 121 ULPMark™ PP score
• 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%)
LQFP48 (7 x 7 mm)
LQFP64 (10 x 10 mm)
LQFP100 (14 x 14 mm)
UFQFPN48 (7 x 7 mm)
UFBGA64
THIN WLCSP49
(5 x 5 mm) (3.14 x 3.15 x 0.20 mm)
UFBGA100 STANDARD WLCSP49
(7 x 7 mm) (3.141 x 3.127 x 0.38 mm)
STANDARD WLCSP64
(3.141 x3.127 x 0.38 mm)
– Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy)
– Internal 48 MHz with clock recovery
– 2 PLLs for system clock, USB, audio, ADC
• Up to 83 fast I/Os, most 5 V-tolerant
• RTC with HW calendar, alarms and calibration
• LCD 8× 40 or 4× 44 with step-up converter
• Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors
• 11x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 2x 16-bit general purpose, 2x 16bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
• Memories – Up to 256 KB single bank flash, proprietary code readout protection
– 64 KB of SRAM including 16 KB with hardware parity check
– Quad SPI memory interface
• Rich analog peripherals (independent supply) – 1x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 µA/Msps
– 2x 12-bit DAC output channels, low-power sample and hold
– 1x operational amplifier with built-in PGA
– 2x ultra-low-power comparators
• 17x communication interfaces – USB 2.0 full-speed crystal less solution with LPM and BCD
– 1x SAI (serial audio interface)
March 2024
This is information on a product in full production.
DS11449 Rev 7
1/227
www.st.com
STM32L433xx
– 3x I2C FM+(1 Mbit/s), SMBus/PMBus
• 14-channel DMA controller
– 4x USARTs (ISO 7816, LIN, IrDA, modem)
• True random number generator
– 1x LPUART (Stop 2 wake-up) – 3x SPIs (and 1x Quad SPI) – CAN (2.0B Active) and SDMMC interface – SWPMI single wire protocol master I/F – IRTIM (Infrared interface)
• CRC calculation unit, 96-bit unique ID
• Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
• All packages are ECOPACK2 compliant
Table 1. Device summary
Reference
Part numbers
STM32L433xx
STM32L433CC, STM32L433RC, STM32L433VC, STM32L433CB, STM32L433RB
2/227
DS11449 Rev 7
STM32L433xx
Contents
Contents
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3
Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1 Arm® Cortex®-M4 core with FPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2 Adaptive real-time memory accelerator (ART Accelerator™) . . . . . . . . . 17
3.3 Memory protection unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4 Embedded flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.5 Embedded SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.6 Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.7 Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.8 Cyclic redundancy check calculation unit (CRC) . . . . . . . . . . . . . . . . . . . 20
3.9 Power supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.9.1 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.9.2 Power supply supervisor . . . . . . . . . . . . . ..