The differences between APB1 and APB2 are mainly three points, namely, the port connected is disconnected, the working speed is different, and the peripheral is different, the specific differences are as follows:
1. Different ports are connected:
APB1 is responsible for DA, USB, SPI, I2C, CAN, serial 2345, ordinary TIM.
APB2 is responsible for AD, I\/O, Advanced TIM, Serial 1.
2, the support speed is different
APB1 supports low-speed work, and APB2 supports high-speed work.
3, the two peripherals are different
The peripherals of STM32 APB1 and APB2 are different, which can be seen in the Chinese manual of STM32 APB1 and APB2.
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