help with microcontroller

Discussion in 'Embedded Systems and Microcontrollers' started by here2learn, Mar 8, 2009.

  1. here2learn

    Thread Starter New Member

    Mar 6, 2009
    2
    0
    can neone help me with micro controller connections??????? i m using at89c51 (40 pi) hv 2 connect an lcd....... to do so 11 pins(8,3) shall be used.....a 4x4 keypad (8 pins) and 3 dc motors thru h bridge.........tat requires another 9 pins( 3 each)........m not sure about wat should be the configuration used....i did not want 2 use port 3 coz i m not thorough with the pins being used........can neone explain how port 3 can be used as i/o port??????which pins of it can safely be used???/ m new to micro controller..........

    another thing.m not using any kind of serial communication requiring ics...... can neone suggest more practical books tat cn be used to design a circuit?????????
     
    Last edited: Mar 8, 2009
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