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the microconrolador overheats

Hello, few days ago I accidentally joined the two signals feeding an H bridge controlled the TMC4. Since that incident when I connect to the computer TMC4 begins to heat up. Add an image in which the party show overheats. Fortunately the microcontroller still works , I took seven readings and the average temperature is 40.3ºC.

Any idea what may be happening to make it to overheat ?, first thing that comes to my mind is a short circuit.

Pd: excuse my english , I am using the translator. Muchas gracias