Each programming channel has two power supply units: VPROG0 which is able to power supply the device (and set up reference for digital signals) and VPROG1 which is able to power up the entire board (although limited in current absorption up to 200mA). The following command could be helpful:
TESTVPROGSets up a defined value on vprog lines.
GETVPROGReturns the read value for the selected VPROG line in mV.
VPROG0: 1,65 – 5,5 max current 250mA, VPROG1: 6V – 13,5V max current 200mA.
You can use an external power supply but, we discourage to use both FR2.0 power supply together with the external power supply unit.