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我初接触Msp430,不知道msp430G2231有没有串口。谢谢！
2331只有USI模块，只支持SPI与I2C，不带有串口
可以通过IO口模拟UART的
准确的说，是用片内的timerA和GPIO口来模拟UART。可以参考一下一片Application Note，SLAA078A
