Datasheet

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STM32L433xx Description
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2 Description
The STM32L433xx devices are the ultra-low-power microcontrollers based on the high-
performance ARM
®
Cortex
®
-M4 32-bit RISC core operating at a frequency of up to 80 MHz.
The Cortex-M4 core features a Floating point unit (FPU) single precision which supports all
ARM single-precision data-processing instructions and data types. It also implements a full
set of DSP instructions and a memory protection unit (MPU) which enhances application
security.
The STM32L433xx devices embed high-speed memories ( Flash memory up to 256 Kbyte,
64
Kbyte of SRAM), a Quad SPI flash memories interface (available on all packages) and
an extensive range of enhanced I/Os and peripherals connected to two APB buses, two
AHB buses and a 32-bit multi-AHB bus matrix.
The STM32L433xx devices embed several protection mechanisms for embedded Flash
memory and SRAM: readout protection, write protection, proprietary code readout
protection and Firewall.
The devices offer a fast 12-bit ADC (5 Msps), two comparators, one operational amplifier,
two
DAC channels, an internal voltage reference buffer, a low-power RTC, one general-
purpose 32-bit timer, one 16-bit PWM timer dedicated to motor control, four general-purpose
16-bit timers, and two 16-bit low-power timers.
In addition, up to 21 capacitive sensing channels are available. The devices also embed an
integrated LCD driver 8x40 or 4x44, with internal step-up converter.
They also feature standard and advanced communication interfaces.
• Three I2Cs
• Three SPIs
• Three USARTs and one Low-Power UART.
• One SAI (Serial Audio Interfaces)
• One SDMMC
• One CAN
• One USB full-speed device crystal less
• One SWPMI (Single Wire Protocol Master Interface)
The STM32L433xx operates in the -40 to +85 °C (+105 °C junction), -40 to +105 °C
(+125
°C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to
3.6
V V
DD
power supply when using internal LDO regulator and a 1.05 to 1.32V V
DD12
power supply when using external SMPS supply. A comprehensive set of power-saving
modes allows the design of low-power applications.
Some independent power supplies are supported: analog independent supply input for
ADC, DAC, OPAMP and comparators, and 3.3
V dedicated supply input for USB. A VBAT
input allows to backup the RTC and backup registers. Dedicated V
DD12
power supplies can
be used to bypass the internal LDO regulator when connected to an external SMPS.
The STM32L433xx family offers eight packages from 48 to 100-pin packages.
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