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STM32L431 データシート(PDF) 13 Page - STMicroelectronics |
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STM32L431 データシート(HTML) 13 Page - STMicroelectronics |
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13 / 200 page  DocID028800 Rev 1 13/200 STM32L431xx Description 48 2 Description The STM32L431xx 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 STM32L431xx 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 STM32L431xx 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. 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 SWPMI (Single Wire Protocol Master Interface) The STM32L431xx 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 power 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, OPAMPs and comparators. A VBAT input allows to backup the RTC and backup registers. The STM32L431xx family offers nine packages from 32 to 100-pin packages. Table 2. STM32L431xx family device features and peripheral counts Peripheral STM32L431Vx STM32L431Rx STM32L431Cx STM32L431Kx Flash memory 256KB 128KB 256KB 128KB 256KB 128KB 256KB SRAM 64KB Quad SPI Yes |
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