Hello~all,thank you for spending time in reading my thread.I have some troubles.The following states:

1).I bought a development board from internet and the serial port is SCIC which connected MAX232. Itís normal in the process of communicating with PC series as well as the serial transceiver.

2).The development board designed by our company,the serial port is SCIB,and the chip is SP3232.However there are nothing about data shows in here ! Why? The data format and baud rate is right which I have checked it !

PS: In the board,there are a chip--SI8422 in the pin of SCIBTXD to be insulated. Is the troubles have any relations with the SI8422? This is SI8422ís datasheet,anybody can help me ?

Thank you in advance!