Are there any over-current or connection issues with the Miniprog3 *A?
There are known electrical risks to the Miniprog3 *A revision with respect to over-current protection and connector polarity. The Miniprog3 *A does not have sufficient ESD and over-current protections on the programming and USB lines. The programmer has to suspect the failures if these conditions are met.
A specific risk is seen when customers reverse the 5 or 10 pin connector when trying to program or debug a system. By doing this, power and ground connections will be connected to an electrically vulnerable configuration. This configuration may damage the Miniprog3 resulting in failures. This often occurs when customers have non-keyed connectors or header in their system.
The current workaround is to be aware of the polarity settings on the target board and/or use keyed connectors when trying to program using the Miniprog3.
Miniprog3 *B is updated to add ESD protection controls to the data and USB lines and protective circuitry for connector polarity mistakes.