What is the final result in Port 1 after the execution of the following program segment? MOV A #55H CPL A MOV P1 A FFH 55H AAH 00H What are the contents of the P2 port execution of the following program segment? MOV A #8FH MOV P2, A SETB P 2.5 A0H AFH 0FH 2FH What are the contents of the P1 port after execution of the following program segment? MOV A #55H MOV P1 A SETB P1.3 CLR P1 .4 6DH 4AH 55H 4DH The job of the TMOD register is to _____ control the transfer of modified data temporarily modify output data values set the timer operating mode generate time delay durations Which of the following does not affect a timer delay written in a 8051 C program? Crystal frequency of 8051 system 8051 machine cycle timing TMOD setting C data type When is the time flag raised in the 8051 time for Mode 1 ? When the value in the register changes from 00G to FFH When the value in the timing register changes from FFH to 00H When the value in the timing register changes from FFFFH to 0000H When the value in the timing register changes from 0000H to FFFFH