STM32 minimum system construction (schematic diagram)

Reprint ：STM32 Minimum system construction （ Schematic diagram ）

Catalog

Preface

One 、 Set up the pin port necessary for the minimum system  

Two 、 Reset circuit

​

3、 ... and 、 External crystal oscillator circuit  

Four 、 System startup configuration

Detailed view stm32 Data manual

---

---

Preface

Let's introduce stm32f103c8t6 Construction of minimum system , This chip is also the biggest seller , Although there are many things integrated in a single-chip microcomputer , But it needs some auxiliary devices to make it run , E.g. power supply circuit 、 Reset circuit 、 External clock circuit and mode configuration .

 

 

One 、 build Minimum system Necessary pin ports  

Pin port name function 1 VBAT External battery positive terminal interface without power failure 3 PC14/OSC32_IN external RTC Crystal oscillator （32.768kHz） 4 PC15/OSC32_OUT external RTC Crystal oscillator （32.768kHz） 5 OSC_IN External system crystal oscillator （ In general 8MHz） 6 OSC_OUT External system crystal oscillator （ In general 8MHz） 7 NRST External reset pin , Low level reset 23,35,47 VSS STM32 Negative terminal of system voltage （0V） 24,36,48 VDD STM32 Positive terminal of system voltage （3.3V） 8 VSS_A STM32 built-in ADC Negative end of power supply （0V） Large capacity chips 9 VDD_A STM32 built-in ADC Positive end of power supply （3.3V） Large capacity chips 20 PB2/BOOT1 System startup configuration pin 44 BOOT0 System startup configuration pin

Two 、 Reset circuit

3、 ... and 、 External crystal oscillator circuit  

although Single chip microcomputer Crystal oscillator is integrated inside , But the crystal oscillator inside the single chip microcomputer is not accurate , External crystal oscillator is required

One 、 External low-speed crystal oscillator circuit

Two 、 External high-speed crystal oscillator circuit

The external high-speed crystal oscillator circuit is the same as the external low-speed crystal oscillator circuit , Just modify the corresponding pin .

Four 、 System startup configuration

BOOT0	BOOT1	Boot mode	explain
X	0	Main flash memory	The main flash memory is selected as the boot area
0	1	System memory	The system memory is selected as the boot area
1	1	Embedded SARM	Embedded SARM Selected as the boot zone

BOOT1 and BOOT0 Same circuit .

 

Detailed view stm32 Data manual