N.C.1A02IP33A14IP15A26A37IP08-IOW9-IOR10RXB11N.C.12TXB13OP114OP315OP516OP717D118D319D520D721GND22N.C23-INT24D625D426D227D028OP629OP430OP231OP032TXA33N.C34RXA35XTAL136XTAL237RESET38-CS39IP240IP641IP542IP443VCC44