problems with at89c51rc

Hi

I have bben working with the at48c4051 and have not had any problems at all - i can use the uart, interrupts, timers, etc; but I just started working with the AT89C51RC and i have not able to do anything with it, not event light up an led!!

The only connections to the chip are the Rxd, Txd, p3_7 where i connect the led and reset to GND (and of course Vcc and Vss).

Does anybody know if I need to set something first? or if i need to connect any other pins? i have been reading and so far they don't require anything else.

I would appreciate any help.

Thanks in advance

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  • I just started working with the AT89C51RC and i have not able to do anything with it, not event light up an led!!
    WHY on earth would anyone start working with an outdated chip?

    Does anybody know if I need to set something first? or if i need to connect any other pins?
    yes, you need to "set" the code, I believe the programming algorithm and something elase there is different. pins: You need to set !EA to the correct state, I assume the chip you used before did not have that pin.

    Erik

Reply
  • I just started working with the AT89C51RC and i have not able to do anything with it, not event light up an led!!
    WHY on earth would anyone start working with an outdated chip?

    Does anybody know if I need to set something first? or if i need to connect any other pins?
    yes, you need to "set" the code, I believe the programming algorithm and something elase there is different. pins: You need to set !EA to the correct state, I assume the chip you used before did not have that pin.

    Erik

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