Final answer:
A two-input binary logic checker with a mode-changing push button for 'AND' and 'OR' operations will require programming of the PIC16F877A microcontroller to process the inputs and debounce the push button. The results will be displayed on an LCD, which shows the current logic mode, inputs, and the logic operation result.
Step-by-step explanation:
To design a two-input binary logic checker for ‘AND’ and ‘OR’ gates using a PIC16F877A microcontroller and an LCD display, you would begin by setting up the inputs for the logic gates. Two pins of the microcontroller would be set as inputs for the binary logic checker. These inputs would connect to either a high or low voltage corresponding to binary values of 1 or 0.
The PIC16F877A would be programmed to use an interrupt or flag to detect a push button press. This push button will toggle the mode between ‘AND’ and ‘OR’ logic operation. In the ‘AND’ mode, the program will output high only if both inputs are high. In the ‘OR’ mode, the program will output high if at least one of the inputs is high.
Finally, the resultant binary output will be displayed on an LCD screen connected to the microcontroller. The display will indicate not only the current mode (AND/OR) but also the input values and the resultant output. For power efficiency and user convenience, debouncing techniques may be implemented for the push button input to prevent false switching due to signal noise.