8 R2IN R2OUT 9
STC STC
0.1uF
2 V+ GND 15
1 C1+ Vcc 16
Vcc
3 C1- T1OUT 14
5 C2- R1OUT 12
6 V- T1IN 11
7 T2OUT T2IN 10
PC_RxD (COM Pin2)
4 C2+ R1IN 13
PC_TxD (COM Pin3)
Gnd
MCU_TxD (P3.1)
MCU_RxD (P3.0)