I want to erase,write and read data program(PEROM) controller target (AT89S51 
and AT89S52) with Microcontroller Master(AT89S51). How to do it(Source code)? 
Any body help me? 
  |================|                  |================|             
|                                |                  |                           
     |
  |                        P1.5 |---------------> |MOSI(P1.5)               |
|                        P1.6 |<--------------- |MISO(P1.6)               |
|                        P1.7 |---------------> |SCK (P1.7)               |
|                                |                  |                           
    |
|                                |                  |                           
    |
|Microcontroler           |                  |Microcontroler           |
|Master                      |                  |Target                      |
|AT89S51                  |                  |(AT89S51,                 |
|                               |                  | AT89S52)                 |
|                               |                  |                            
    |
|                               |                  |                            
    |
|================|                 |================| 
  thx
  irvan

       
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