DSP is heating up too strongly

[buenos]

heating

i made a mistake:
i pulled out a connector, from a working circuit, which has a DSP (TMS320F2811).
since that, the DSP is heating up, wery strongly, when i turn on the circuit.
but, the DSP works well, the program runs, it responses to the outside world.
i turned off the circuit after some seconds, because i thought that it will die.

what is it? what causes it?
has the DSP gone wrong? or something else has?

 

[IanP]

Re: heating

Try to eliminate all other possibilities ..
For example, have you checked/measured the supply voltage?
Maybe you have a problem with voltage regulator(s) and the supply voltage is to high???
Regards,
IanP

 

[buenos]

heating

supply is OK.
that time, when it has gone wrong, another circuit has too: a power switch transistor, in the supply board. it turned to short circuit. i have replaced that, but it has no influence to the DSP, just to another circuit.
the short circuit fault: is this caused by an overvoltage? if yes, maybe the DSP has had an overvoltage in a signal pin too.

Added after 5 hours 8 minutes:

the 3.3V supply falled down to 3.27V, and the core regulator, the 1.8V reg does not heat. So there is a overcurrent, in the i/o voltage rail.