Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N - Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N In order to support one PCB the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N, Need to connect additional I/O pins of EP4CGX30CF23C8N (see below) to GND/VCCINT (1.2V) I compile EP4CGX150CF23C8N with Migration to EP4CGX30CF23C8N, as expected at the project.pin report the pins connected to GND/VCCINT for example: my question is if I assembled EP4CGX30CF23C8N and pin H16 (for example) connected to VCCINT(1.2V) , is it ok or Should I add serial resistor to the VCCINT pins in order to disconnect it when I use the EP4CGX30CF23C8N? Thanks & Best Regards, Israel Ben-Yeda Replies: Re: Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N Hi Israel Ben-Yeda, It is not mandatory. You can refer to the link below for more details about this issue. When migrating devices that have overlapping I/O and power pins, how... Regards, Aqid Ayman Replies: Re: Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N Hi, It’s “good practice to add additional resistor “ or mandatory? Because it complicates the layout and can also hurt it (Hits VCCINT's polygon continuously), Thanks & Best Regards, Israel Ben-Yeda Replies: Re: Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N Hello Israel Ben-Yeda, For me, it is a good practice to add additional resistor to the I/O pins even if you are not using it as it is connected to VCCINT. Replies: Re: Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N Thanks, I don't need to use those pins as I/Os, so I don't need the resistor? GX30 IO pin should have no problems connecting to VCCINT? Thanks & Best Regards, Israel Ben-Yeda Replies: Re: Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N Hello Israel Ben-Yeda, If you plan to use those pins as GPIOs, then you may add the resistor and put DNI. Replies: Re: Same PCB for the two CY4 FPGAs EP4CGX150CF23C8N & EP4CGX30CF23C8N Generally, supported device migration doesn't require jumper resistors or similar, GX30 IO pin should have no problems to connect to VCCINT. Frank