430 UART程序实例 包括初始化代码设置，中断方法实现-Descr iption: This program demonstrates a half-duplex 2400-baud UART using

　　Timer_A3 and a 32kHz crystal.　The program will wait in LPM3, echoing

　　back a received character using 8N1 protocal. The 32768 crystal is used

　　directly as the Timer_A clock and baud rate generator.