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英文原文：
STM32 Microcontroller
Introduction
Requirements based STM32 family is designed for high-performance, low-cost, low-power embedded applications designed specifically for ARM Cortex-M3 core. According to the performance into two different series: STM32F103 "Enhanced" series and STM32F101 "Basic" series. Enhanced Series clock frequency of 72MHz, the highest performance of similar products product; basic clock frequency of 36MHz, 16-bit product prices get more than 16 products significantly enhance the performance and is 16 product users the best choice. Both series have built-in 32K to 128K of flash memory, the difference is the maximum capacity of the SRAM and peripheral combinations. At 72MHz, executing from Flash, STM32 power consumption 36mA, are 32 products on the market's lowest power, the equivalent of .
STM32F103 Performance Characteristics
Kernel. ARM32 bit CPU, the maximum operating frequency of 72MHz, . Single-cycle multiply and hardware divide.
Memory. Integrated on-chip 32-512KB of Flash memory. 6-64KB SRAM memory.
Clock, reset, and power management. - power supply and I / O interface, the drive voltage. POR, PDR and programmable voltage detector. 4-16MHz crystal. Embedded factory tuned 8MHz RC oscillator circuit. 40 kHz internal RC oscillator circuit. CPU clock for the PLL. With calibration for the RTC 32kHz cryst