Dear JS
Thanks for the feedback, the output is now fine, it will produce exactly 5.0V, But Still I can probe and detect the PFS173,But reading, flashing etc fails!
though I found something weird! when I measured the VDD and VPP with this command
//be carefully, remove IC from programmer!
FPDKCOM_SetOutputVoltages(comfd, 100.0, 100.0);
The output was swamped, I mean I could measure the VPP to be 13.7V and the VDD to be 6.45V with my Multi-meter, but in the terminal it was the other way around!
I double checked the schematic to see if I have connected the DAC's on my PCB swapped, But it was like your schematic!
I have attached my schematic and it's exactly like easyPDK hardware in the DAC part.