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 any demo board design released by altera for CYCLONE IV? Thank you.連結已複製
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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.definitely check out the Schematic Review Worksheets and the Pin Connection Guidelines they are derived from:
http://www.altera.com/download/board-layout-test/schematic-review-ws/srw-index.jsp