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18F452 programming specs

Discussion in 'Electronic Design' started by Fred, Feb 17, 2007.

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  1. Fred

    Fred Guest

    Hi everyone,
    I didn't find a newsgroup for this particular subject so I decided to post
    here.

    Programming specs for 18F452:
    http://ww1.microchip.com/downloads/en/DeviceDoc/39576b.pdf

    I'm trying to understand the "code memory" programming of a 18F452 (or same
    family PIC) using multi-panel writing (p. 10 and up). Microchip explanation
    confuses me when it comes to the address I must use in the TBLPTR register.

    Is TBLPTR register actually holding the address of the code memory to be
    program?

    Using the equation in their programming flow (p. 13), it doesn't give a
    linear incrementing address at each iteration of the programming loop:

    Panel Base Address = (N-1) * 2000h
    Addr = Panel Base Address + (8*LoopCount)

    Anyone could shade some light?

    Freddy
     
  2. Your writing to a couple of 8 byte buffers, which are then all written
    simutaniously to the code memory. addresses of these 8byte blocks of code
    would be 2000h, 4000h 6000h etc.
    You would apparently take you hex file and get the first 8 bytes of these
    boundaries 2000h, 4000h, 6000h etc and write these values to the buffer.

    Seems straight forward. ;)

    Cheers
     
  3. Fred

    Fred Guest

    I thought the programming was progressive from 0000h to 7fffh and I didn't
    understand what Microchip really means with the term "Panel".


    Thanks!
     
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