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IN-SYSTEM PROGRAMMING COMMANDS FOR THE P89C51Rx2

Doug Ricket, 6-23-01

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BEFORE ANY PROGRAMMING:

	1. Enter a capital U, verify that it is received

	2. Set the timer for 11 Mhz



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To make a chip run from location 0 on start-up

	1. Erase Status Byte and Boot Vector

	2. Program Status Byte to 0

	3. Program Status Byte to FC *** IMPORTANT ***



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To upload code:

	1. Erase Block 1

	2. Paste the .OBJ file



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Set Timer for 11 MHz:

:010000020BF2



Erase Status Byte and Boot Vector: [ before programming new SB-BV ]

:020000030400F7



Set Status Byte to Zero: [ to run code at 0000 on reset ]

:03000003060000F4



Set Boot Vector to 70: [ for RD2MON ]

:0300000306017083



Set Boot Vector to FC: [ for default loader program ]

:030000030601FCF7



Read Status Byte:	

:020000050701F1



Read Boot Vector:

:020000050702F0



Erase Block 1: [ before uploading new programs; takes 3 seconds ]

:020000030100FA



Erase Block 1: [ before uploading new programs; takes 3 seconds ]

:020000030100FA



Erase Block 3: [ before uploading new programs; takes 3 seconds ]

:020000030140BA









Full Chip Erase: [ takes 3 seconds ]

:0100000307F5



Read Data in location 0-100

:050000040000010000F6



Read Data in location 0-500

:050000040000050000F2



Read Data in location 7000-7500

:05000004700075000012