4x4 keypad interface program and Proteus simulation setup using PIC microcontroller
Here’s a complete 4x4 keypad interface program and Proteus simulation setup using PIC microcontroller (e.g., PIC16F877A) with MPLAB and XC8. This includes code and steps for simulation.
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✅ 4x4 Keypad Overview:
A 4x4 keypad has:
4 Rows (R1–R4)
4 Columns (C1–C4)
16 Keys in total.
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🔌 Hardware Connection Example
Assume:
Rows (R1–R4): connected to PORTB bits RB0–RB3 (outputs)
Columns (C1–C4): connected to PORTB bits RB4–RB7 (inputs)
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📟 Keypad Layout
[1] [2] [3] [A]
[4] [5] [6] [B]
[7] [8] [9] [C]
[*] [0] [#] [D]