描述了AT91RM9200处理器同步串口SSC的特性，结合实际应用，详细介绍SSC与E1成帧器DS21554的连接电路及时序分析。
Abstract:
The characterisTIcs of AT91RM9200 serial synchronous controller SSC are described. The applicaTIon circuit and TImings analysis between SSC and E1 frame for DS21554 are introduced detailedly.
