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I have a 4x4 keypad(ordinary keypad with no data sheets) which has only 8 o/p pins(nothing other than that) and a board MCB2140 (from keil).I have the processor schematics,but I have struck with the pin connection details of the board with keypad. Please help me to move ahead.Thanks in advance!
See: http://www.keil.com/forum/docs/thread14764.asp#msg73875 ?