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Altera_Forum
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15 years ago

If transceiver not used,should power connected?

I'm designing a pcb with an EP4CGX110 in it.I'am not going to use the transceiver part, so can i just leave the VCCL_GXB VCCH_GXB VCCA_GXB and the differential IO not connected? And is there a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I guess, it's exactly specified in the datasheet.

Previous GXB devices (e.g. Arria) has these requirements:

- Power all supply voltages

- Connect all unused differential inputs to a (common) pair of weak pull-up/pull-down resistors

It's most likely correct for Cyclone IV, too.