多模式应用的GPIO端口设计

GPIO design for multi-mode applications

设计实现了一种多模式应用的GPIO端口。在传统GPIO结构的基础上,该GPIO增加了双向SCR、GGNMOS、GDPMOS等特殊结构,同时对输入输出驱动结构进行改进,使得端口能够正常实现数据传输,又能具备一定的ESD保护能力。采用180nm高压工艺使得该GPIO电路具备一定的耐压特性。经过仿真测试验证,该GPIO能够稳定实现三种工作模式的数据传输功能。

A GPIO port for multi-mode application is designed and implemented.On the basis of the traditional GPIO structure,the GPIO adds bidirectional SCR,GGNMOS,GDPMOS and other special structures,while improving the input and output driver structure,so that the port can achieve normal data transmission,but also have a certain ESD protection ability.The 180nm high voltage process makes the GPIO circuit have certain voltage resistance characteristics.The simulation results show that the GPIO can realize the data transmission function of three working modes stably.