In SX Microcontrollers, SX/B Compiler and SX-Key Tool, sounddezign wrote:

Has anyone else had any problems with the SX52 with regards to constantly blowing them up? I'm new to using these microcontrollers, only previously having worked with 8051's and AVR's.
 

I've prototyped a 16bit bus to connect multiple sx boards together and allow fast communications. I havent got as far as testing communications yet because the sx's malfunction.

The prototype boards are completely bare apart from a max232 and I've only tested them with unconnected to the bus. I can program them many times and get them running with my code and probing with a scope to check correct operation. But after a while the sx port pins all go high and the chip becomes too hot to touch. after this i cannot reprogram it and the only solution thats worked is removal and soldering on a new sx. This has even happened when all pins are programmed for high impedance inputs.

 

My workspace is covered in antistatic matting and im strapped up.

 

The only reason i can think of is perhaps ive accidentally shorted 2pins with my scope probe.

 

Please help, its becomming iritating replacing 52pin smt ic's every couple hours and very expensive

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