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ST公司的stm32F303xB/STM32F303xC系列是基于高性能ARM? Cortex?-M4 32位RISC核的MCU，工作頻率高達72MHz，嵌入了浮點單元（FPU），存儲器保護單元（MPU）和嵌入跟蹤宏單元（ETM），集成了高速嵌入存儲器（高達256KB 閃存，高達40KB SRAM）和各種連接到兩個APB總線的增強I/O和外設，提供多達四個快速12位ADC（5Msps），七個比較器，四個運放，以及多達2個DAC通路，一個低功耗RTC，多達五個通用16位計時器，一個通用32位計時器和兩個用來馬達控制的計時器。工作電壓2.0 - 3.6 V，主要用在低功耗應用。本文介紹了STM32F303xB/STM32F303xC系列主要特性，框圖，時鐘樹以及Discovery kit STM32F3DISCOVERY板主要特性，硬件框圖，電路圖和PCB布局圖。
The STM32F303xB/STM32F303xC family is based on the high-performance ARM? Cortex?-M4 32-bit RISC core with FPU operating at a frequency of up to 72 MHz， and embedding a floating point unit （FPU）， a memory protection unit （MPU） and an embedded trace macrocell （ETM）。 The family incorporates high-speed embedded memories （up to 256 Kbytes of Flash memory， up to 40 Kbytes of SRAM） and an extensive range of enhanced I/Os and peripherals onnected to two APB buses.
The devices offer up to four fast 12-bit ADCs （5 Msps）， seven comparators， four operational amplifiers， up to two DAC channels， a low-power RTC， up to five general-purpose 16-bit timers， one general-purpose 32-bit timer， and two timers dedicated to motor control. They also feature standard and advanced communication interfaces： up to two I2Cs， up to three SPIs （two SPIs are with multiplexed full-duplex I2Ss）， three USARTs， up to two UARTs， CAN and USB. To achieve audio class accuracy， the I2S peripherals can be clocked via an external PLL.
The STM32F303xB/STM32F303xC family operates in the -40 to +85℃ and -40 to +105℃ temperature ranges from a 2.0 to 3.6 V power supply. A comprehensive set of power-saving mode allows the design of low-power applications.
The STM32F303xB/STM32F303xC family offers devices in four packages ranging from 48 pins to 100 pins.The set of included peripherals changes with the device chosen.
STM32F303VCT6主要特性：
? Core： ARM? Cortex?-M4 32-bit CPU with FPU （72 MHz max）， single-cycle multiplication and HW division， 90 DMIPS （from CCM）， DSP instruction and MPU （memory protection unit）
? Operating conditions：
– VDD， VDDA voltage range： 2.0 V to 3.6 V
? Memories
– 128 to 256 Kbytes of Flash memory
– Up to 40 Kbytes of SRAM， with HW parity check implemented on the first 16 Kbytes.
– Routine booster： 8 Kbytes of SRAM on instruction and data bus， with HW parity check （CCM）
? CRC calculation unit
? Reset and supply management
– Power-on/Power-down reset （POR/PDR）
– Programmable voltage detector （PVD）
– Low-power modes： Sleep， Stop and Standby
– VBAT supply for RTC and backup registers
? Clock management
– 4 to 32 MHz crystal oscillator
– 32 kHz oscillator for RTC with calibration
– Internal 8 MHz RC with x 16 PLL option
– Internal 40 kHz oscillator
? Up to 87 fast I/Os
– All mappable on external interrupt vectors
– Several 5 V-tolerant
? Interconnect matrix
? 12-channel DMA controller
? Four ADCs 0.20 μS （up to 39 channels） with selectable resolution of 12/10/8/6 bits， 0 to 3.6 V conversion range， single ended/differential input， separate analog supply from 2 to 3.6 V
? Two 12-bit DAC channels with analog supply from 2.4 to 3.6 V
? Seven fast rail-to-rail analog comparators with analog supply from 2 to 3.6 V
? Four operational amplifiers that can be used in PGA mode， all terminals accessible with analog supply from 2.4 to 3.6 V
? Up to 24 capacitive sensing channels supporting touchkey， linear and rotary touch sensors
? Up to 13 timers
– One 32-bit timer and two 16-bit timers with up to 4 IC/OC/PWM or pulse counter and quadrature （incremental） encoder input
– Two 16-bit 6-channel advanced-control timers， with up to 6 PWM channels， deadtime generation and emergency stop
– One 16-bit timer with 2 IC/OCs， 1 OCN/PWM， deadtime generation and emergency stop – Two 16-bit timers with IC/OC/OCN/PWM， deadtime generation and emergency stop
– Two watchdog timers （independent， window）
– SysTick timer： 24-bit downcounter
– Two 16-bit basic timers to drive the DAC
? Calendar RTC with Alarm， periodic wakeup from Stop/Standby
? Communication interfaces
– CAN interface （2.0B Active）
– Two I2C Fast mode plus （1 Mbit/s） with 20 mA current sink， SMBus/PMBus， wakeup from STOP
– Up to five USART/UARTs （ISO 7816 interface， LIN， IrDA， modem control）
– Up to three SPIs， two with multiplexed half/full duplex I2S interface， 4 to 16 programmable bit frames
– USB 2.0 full speed interface
– Infrared transmitter
? Serial wire debug， Cortex?-M4 with FPU ETM， JTAG
? 96-bit unique ID
圖1.STM32F303xB/STM32F303xC框圖
圖2.STM32F303xB/STM32F303xC時鐘樹
STM32F303VC MCUDiscovery kitSTM32F3DISCOVERY
The STM32F3DISCOVERY Discovery kit is a complete demonstration and development platform for STMicroelectronics Arm? Cortex?-M4 core-based STM32F303VCT6 microcontroller. It includes an ST-LINK/V2 （or V2-B） embedded debug tool interface， an ST MEMS gyroscope， an ST MEMS E-compass， LEDs， push-buttons， and a USB Mini-B connector.
圖3.Discovery kit STM32F3DISCOVERY外形圖
Discovery kit STM32F3DISCOVERY板主要特性：
? STM32F303VCT6 Arm?（a）-based microcontroller featuring 256 Kbytes of Flash memory， 48 Kbytes of RAM in an LQFP100 package
? On-board ST-LINK/V2 for PCB Version A or B or ST-LINK/V2-B for PCB Version C and newer
? USB ST-LINK functions：
– Debug port
– Virtual COM port with ST-LINK/V2-B only
– Mass storage with ST-LINK/V2-B only
? Board power supply： through the USB bus or from an external 3 V or 5 V supply voltage
? External application power supply： 3 V and 5 V
? L3GD20， ST MEMS motion sensor， 3-axis digital output gyroscope
? LSM303DLHC， ST MEMS system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor
? Ten LEDs：
– LD1 （red） for 3.3 V power-on.
– LD2 （red/green） for USB communication.
– Eight user LEDs， LD3/10 （red）， LD4/9 （blue）， LD5/8 （orange） and LD6/7 （green）。
? Two push buttons （user and reset）
? USB USER with Mini-B connector
? Extension header for LQFP100 I/Os for quick connection to prototyping board and easy probing
? Comprehensive free software including a variety of examples， part of STM32CubeF3 package or STSW-STM32118 for legacy Standard Library usage
圖4.Discovery kit STM32F3DISCOVERY硬件框圖
圖5.Discovery kit STM32F3DISCOVERY電路圖（1）
圖6.Discovery kit STM32F3DISCOVERY電路圖（2）：ST-LINK/V2（僅SWD）
圖7.Discovery kit STM32F3DISCOVERY電路圖（3）：STM32F303VCT6 MCU
圖8.Discovery kit STM32F3DISCOVERY電路圖（4）：外設
圖9.Discovery kit STM32F3DISCOVERY PCB布局圖：頂層
圖10.Discovery kit STM32F3DISCOVERY PCB布局圖：底層
圖11.Discovery kit STM32F3DISCOVERY PCB尺寸圖
詳情請見：
https://www.st.com/content/ccc/resource/technical/document/user_manual/8a/56/97/63/8d/56/41/73
/DM00063382.pdf/files/DM00063382.pdf/jcr:content/translations/en.DM00063382.pdf
en.DM00063382.pdf
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