说明：  // Description: Echo a received character, RX ISR used. Normal mode is LPM0, // USART0 RX interrupt triggers TX Echo. // ACLK = MCLK = UCLK0 = LFXT1 = 8MHz // Baud rate divider with 8Mhz XTAL = 8000000/115200 = 0069 (0045h) // //* An external 8Mhz XTAL on XIN XOUT is required for ACLK *// // //* Min Vcc required varies with MCLK frequency - refer to datasheet *//
(// Description: Echo a received character, RX ISR used. Normal mode is LPM0, // USART0 RX interrupt triggers TX Echo. // ACLK = MCLK = UCLK0 = LFXT1 = 8MHz // Baud rate divider with 8Mhz XTAL = 8000000/115200 = 0069 (0045h) // //* An external 8Mhz XTAL on XIN XOUT is required for ACLK*// // //* Min Vcc required varies with MCLK frequency- refer to datasheet*// )