A 32-bit computer system uses 16 7-segment LEDs as output devices, and uses dynamic display interface ciruit. What are the correct descriptions of the output circuit of the output device?
某32位计算机采用16个7段数码管作为输出设备，采用动态显示接口电路，以下关于该输出设备接口电路描述正确的是？
A、Adopt three-state gate, at least two ports
采用三态门实现，至少需要两个端口
B、Using triggers, only one port is needed
采用触发器实现，仅需一个端口
C、Implemented by register, at least two ports
采用寄存器实现，至少需要两个端口
D、Adopt latch to realize, only need one port
采用锁存器实现，仅需一个端口