On Sun, 31 Dec 2000 01:27:46 -0500, you wrote:

>I am having a serious problem getting started with the 16F877.  All the
>pins are pulled low (~10k resistors to ground) except for VSS and VDD,
>which are respectively connected to ground and +5V (coming out of a =
7805,
>with a few caps to level the voltage).  Yet the chip draws around an amp
>and starts heating....  It's as if the VSS and VDD pins are internally
>shorted to each other.  I'm positive that everything is hooked up as
>described; e.g., I didn't swap the supplies to VSS and VDD, causing a =
short
>through the protective diodes.  While I suspect that I've toasted this
>chip, I'm wondering what I did wrong, in the interest of not toasting
>another one.  I'm also very curious what could cause such a critical
>internal short.
Usually reverse polarity, or connecting one pair of vss/vdd lines the
wrong way round so the internal interconnects pass current.

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