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TMS320F280049: 串口通信,RS485,RS232等

Part Number: TMS320F280049

f280049(100Pin)的使用485或者232类似的通讯,需要配置SCI,但是只有SCIA和SCIB两个口可以使用,实际使用中的数量不够用,在不增加其他mcu或者转换芯片的情况下 ,F280049(100Pin)有没有其他的寄存器可以配置,做为RS485一类的串口使用呢