PIC16F84AT-04/SO PIC16F84AT-04/SS PIC16F84AT-04E/SO PIC16F84AT-04E/SS PIC16F84AT-04I/SO PIC16F84AT-04I/SS PIC16F84AT-20/SO PIC16F84AT-20/SO 单片机MCU PIC16F84AT-20/SS PIC16F84AT-20E/SO