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8051 PS2 Keyboard and LCD interfacing with 8051 microcontroller 1.0

Interfacing code for connecting a PS2 keyboard with 8051 microcontroller in Keil C.

  1. sajivjess
    Interfacing code for connecting a PS2 keyboard with 8051 microcontroller. The keil c code reads the keyboard and display it over the LCD display.

    LCD Connection
    ---------------------------------------------------
    |LCM-----51 | LCM-----51 | LCM------51 |
    --------------------------------------------------|
    |DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0 |
    |DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1 |
    |DB2-----P1.2 | DB6-----P1.6 | E--------P2.2 |
    |DB3-----P1.3 | DB7-----P1.7 | VLCD 1K resistor connected to GND|
    ---------------------------------------------------

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    Keyboard Connection
    PS/2--------51
    1 DATA------P3.4
    3 GND
    4 VCC
    5 CLK-------P3.3Connected to the 51 external interrupt trigger is low


    [Note:AT89S51 is used and clocked with 12M or 11.0592M crystal]