LED blinking program using 8051

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 Simple 8051 LED blinking program

 

LED ON → OFF → ON → OFF

 Continuous blinking

Delay depends on clock frequency

 

AddressMnemonicOpcode (Hex)
9000SETB P1.0D2 90
9002MOV R7,#0FFH7F FF
9004MOV R6,#0FFH7E FF
9006DJNZ R6,9006DE FE
9008DJNZ R7,9004DF FA
900ACLR P1.0C2 90
900CMOV R7,#0FFH7F FF
900EMOV R6,#0FFH7E FF
9010DJNZ R6,9010DE FE
9012DJNZ R7,900EDF FA
9014SJMP 900080 EA    

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