1.what is the benefit of using negative numbers in timer registers? 2.in start up condition whether the ports will be programed as input or output? 3.in the parallel port window what is the exact need for using P1: and pins: checks box
1. For a increasement timer (overflow to activate), writing negative numbers can help writer to know exactly time value.
2. In most design, IO ports of MCU will be initialised to input or float type. Direct output may be dangerous and need designer to take careful consideration.
3. You can check documentations on this website.
1.what is the benefit of using negative numbers in timer registers? That your code works
2.in start up condition whether the ports will be programed as input or output? not 'programmed' but assigned the reset value
unless you plan a career in designing microprocessor chips the above quesations are irrelevant.