I agree. My neighbor has an eGrip for the A5 and it didn't seem to be powered by a Atmel chip. I wasn't able to get too close, but I would guess by the switches used to modify the firing modes, that it is not powered by a microcontroller.
In the Phenom board, there are three electromagnetic relays that are used to turn on the board, and sense when the trigger is pulled. I may have been wrong in how I'm using them (it has been a burning question in my head since I started). Out of the 3 relays, I'm utilizing 1 of them. 2 of the relays appear to be identical; they sense when the trigger is pulled. The other relay does not appear to connect directly to the micro controller (it is used to power the board).On the Phenom, there is a rare earth magnet in the safety switch. When the switch is rotated to full auto, the magnet activates a relay to power on the board. I'm not sure how an APE board is powered on for the x7. It's possible that their board has another relay to sense the mechanical safety-switch position as well as full auto. In other words, this may not be possible for the x7 or Phenom without modifying the hardware on the board.