Interpretation of STM32 chip

1. Internal resources of the chip

Kernel:
– 32-bit high-performance ARM Cortex-M3 processor
– Clock: up to 72M, can actually super-screen a little bit
– Single cycle multiplication and hardware division
Memory capacity:
– STM32F103ZET6: 512K FLASH，64K SRAM
– STM32F103RCT6: 256K FLASH，48K SRAM
Clock, reset and power management:
– 2.0 ~ 3.6V power supply and IO voltage
-Power-on reset, power-off reset and programmable voltage monitoring
– powerful clock system

   -4 ~ 16M external high speed crystal
       -Internal 8MHz high speed RC oscillator
       -Internal 40KHz low-speed RC oscillator, watchdog clock
       -Internal phase-locked loop (PLL, frequency multiplication), the general system clock is external
         The internal or internal high-speed clock is obtained after PLL frequency multiplication
       -External low-speed 32.768K crystal oscillator, mainly used as RTC clock source *

IO port:
–STM32F103ZET6: 144 pins 112 IO
–STM32F103RCT6: 64 pins 51 IO
– Most IO ports are 5V resistant (except analog channels)
– Support debugging: SWD and JTAG, SWD only needs 2 data lines
Low power consumption:
-Sleep, stop and standby three low-power modes
– Use battery to power RTC and backup registers
AD:
– 3 12-bit AD [up to 21 external measurement channels]
– Conversion range: 0 ~ 3.6 (power supply voltage)
– Internal channels can be used for internal temperature measurement
– Built-in reference voltage
DA:
2 12-bit DA
DMA:
12 DMA channels (7 + 5 = 12; 7 channels DMA1, 5 channels DMA2)
Support peripherals: timer, ADC, DAC, SDIO, I2S, SPI, I2C, and USART
Timer:
Up to 11 timers
-4 general-purpose timers
-2 basic timers
-2 advanced timers
-1 system timer
-2 watchdog timers
Communication Interface:
Up to 13 communication interfaces
-2 I2C interfaces
-5 serial ports
-3 SPI interfaces
-1 CAN2.0
-1 USB FS
-1 SDIO

Second, the internal structure of the chip

Three, chip pin function diagram

Four, STM32 minimum system

powered by
reset
Clock: external crystal oscillator (2)
Boot boot mode selection
Download circuit (serial port / JTAG / SWD)
battery backup