Part Number:TMS320F28075
Hi, my customer is using F28075 and find several devices broken recently.
5 devices are VDDIO short to VSS. 2 devices are GPIO58 short to VSS.
The schematic is shown below.
Three GPIOs and GND on board 1 and board 2 are connected to one DIP switch with about 70cm long wire.
The problem happens after the wire extended from less than 10cm to about 70cm. So I guess the problem is caused by the long cable.
It's strange that they just put the board there with 3.3V powered, main power stage(buck) not powered, and the device failed without any touch.
1. What may cause the device fail? Are GPIO58 short to VSS and VDDIO short to VSS caused by the same reason?
2. How to solve this problem?
