The main difference between programmable parallel interface chips and non-programmable parallel interface chips is their functionality and flexibility.
1. Programmable parallel interface chip:
A programmable parallel interface chip is a programmable chip that can be programmed and reprogrammed as needed. They are generally highly flexible and configurable and can be used for different applications and systems.
Programmable parallel interface chips usually have the following characteristics:
- Support a variety of data transmission methods: programmable parallel interface chips can be programmed to support different data transmission methods, such as single byte, double byte, four byte, etc.
- Support multiple transmission rates: programmable parallel interface chips can be programmed to support different transmission rates, such as high speed, low speed, etc.
- Support for multiple transmission protocols: Programmable parallel interface chips can be programmed to support different transmission protocols, such as parallel transmission, serial transmission, etc.
- Support a variety of control modes: programmable parallel interface chips can be programmed to support different control modes, such as read and write control, interrupt control, etc.
Because of its high flexibility and configurability, programmable parallel interface chips are often used in complex system design, such as embedded systems, communication systems, etc.
2. Non-programmable parallel interface chip:
A non-programmable parallel interface chip is a fixed, non-programmable chip whose internal logic and function cannot be modified once it is manufactured.
Non-programmable parallel interface chips usually have the following characteristics:
- Fixed data transmission mode: The non-programmable parallel interface chip has a fixed data transmission mode, such as single byte, double byte, four byte, etc.
- Fixed transmission rate: The non-programmable parallel interface chip has a fixed transmission rate, such as high speed, low speed, etc.
- Fixed transmission protocol: The non-programmable parallel interface chip has a fixed transmission protocol, such as parallel transmission, serial transmission, etc.
- Fixed control mode: The non-programmable parallel interface chip has a fixed control mode, such as read and write control, interrupt control, etc.
Due to its fixed nature and non-configurability, non-programmable parallel interface chips are often used in simple system designs, such as printers, displays, etc.