csb wrote:

>>Erase requires a pretty accurate VDD supply, for that
>>chip 4.75-5.25V. You can program at less voltage OK,
>>but not erase.
>>    
>>
>
>I just checked that, and it seems ok - about 5.05V according
>to 2 multimeters and 1 analog scope. I also check the
>VPP level, and maybe that could be part of the problem. I'm
>using a resistor tied to VPP, and an NPN trans to pull MCLR to
>0V. Could it be the chip is drawing off too much current through
>the resistor? It's kind of hard to measure... I'll try probing
>the voltage drop on the resistor some time today.
>
>Thanks,
>Christian
>
>  
>
What voltage do you have _AT_ the MCLR\ pin?

--Bob

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