With the rapid development of electronic technology, microcontrollers are increasingly used in various electronic systems. Initially, there were not many issues in simple systems, but in complex systems, multiple microcontrollers need to work together to achieve their respective functions and communicate with each other. Therefore, learning how to choose the communication method for microcontrollers is very important!
1. Hardware UART Asynchronous Serial Communication Features: Occupies fewer pins, effective and reliable. Suitable scenarios: When the microcontroller has a hardware UART module and does not require extensive serial communication with the outside world.
2. On-chip SPI/I2C Interface Serial Communication Features: Simple hardware, easy software programming. Suitable scenarios: When the microcontroller has a built-in SPI/I2C module and requires a simple and efficient serial communication method.
3. Software Simulated SPI/I2C Mode Communication Features: Low hardware cost, but high software overhead, communication speed is limited. Suitable scenarios: When the communication volume is very small and there are strict cost requirements.
4. Point-to-Point Parallel Communication Features: Fast communication speed, but occupies many pins. Suitable scenarios: When hardware pin resources are abundant and there are high requirements for communication speed.
5. Dual-Port RAM as Buffer Communication Features: Fast communication speed, but high hardware cost. Suitable scenarios: When there are special requirements for communication speed and the budget is sufficient.
6. Using Ferroelectric RAM (FRAM) as a Data Buffer Features: Combines with the I2C bus to achieve simple, efficient, and reliable communication. Suitable scenarios: When multiple microcontrollers are designed in combination and a flexible, scalable communication method is needed.
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