*Channel can be programmed from external CPU through CLK, DATA, LE lines.
*Input signal should be 9600bps maximum with 5ms maximum pulse width 
*STD-302N/N-R does not have specific data protocol
*Switching time between TX and RX is approx. 5ms.
*PLL IC in the STD-302N/N-R is Fujitsu MB15E03

More detail about interface method, please check application note.

For RS232 interface or UART interface, please refer to CCR product