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After connecting external keypad and display to ARM7 MCB2140,is there any software application to be loaded or executed to make it operate???
while interfacing the 4x4 keypad and 16x2 lcd with mcb2140(keil board with lpc2148) do we need any external components like resistors,transistors and capacitors.
Again, look at the Datasheet for the processor, the schematics for the board, and the datasheets for the peripherals (keypad, LCD) - those documents tell you all you need to know!