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byisrael's avatar
byisrael
Icon for New Contributor rankNew Contributor
3 years ago
Solved

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 EP4CGX150CF23C8...
AqidAyman_Altera's avatar
AqidAyman_Altera
Icon for Regular Contributor rankRegular Contributor
3 years ago

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.


byisrael's avatar
byisrael
Icon for New Contributor rankNew Contributor
3 years ago

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