btbass said:You don't say which Pic32 you are using.
Pin 57 is Supply or voltage reg enable and Pin 25 is Ground.
I have not had a problem with the M32 I have used.
If these pins were internally shorted then the chip would draw large current from the power supply and get very hot.
btbass said:The micro should only draw about ~50mA when you power it up for programming?
Is the programmer supplying the power supply?
You must have a short somewhere? It is unlikely that all your chips have the same fault.
btbass said:I have three Pic32 chips mounted on Microchip PIM modules. They are in 100 Pin packages and they all work fine.
If you are measuring a short between Pin 57 and Pin 25 on a chip before soldering it to the pcb, then the power supply is zapped.
Pin 57 would also be short to Pins 9 and 41, the other ground pins.
You must have a faulty batch of chips so you need to get in touch with Microchip support or your component supplier.
btbass said:Have you got a capacitor connected from Pin 56, Vcap/Vddcore, to ground?
Data sheet Section 2.3.
This cap is needed for the core voltage regulator in the chip which is derived from Pin 57.
btbass said:Try disconnecting just that pin and see what happens?
They have changed the pin function on the later devices, that used to be reg enable. Maybe the data sheet is wrong?
Long shot but what have you got to loose?
btbass said:I have successfully used the 360F512L and the 795F512L.
I am at present working with the usb and can modules in the 795.
Both of these chips are in 100 pin packages.
I do intend to migrate the code to a 575F256H in a 64 pin package for the final product. I hope I dont meet the same problems as you when I move to the smaller package.
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