Vicm for REFCLK in Cyclone IV GX

Question

the cyclone4 handbook say that:

Vicm divided by two 1K res from a 2.5v source,that is 1250mv(Chapter 1: Cyclone IV Transceivers Architecture 1–29 Transceiver Clocking )

..but the Switching Characteristics chapter say VICM (AC coupled) should be 1100 ± 5%(Chapter 1: Cyclone IV Device Datasheet 1–17 Switching Characteristics)

...confused...

which one is right?

altera_forum · Answer

i use 3v3 lvpecl as refclk input votage level.

Forum Discussion

Vicm for REFCLK in Cyclone IV GX

1 Reply

Recent Discussions

Thermal Model & Power Estimation for Agilex 7 - AGIB027R31B2I1V

Agilex 5 FPGA EMIF: sharing LPDDR4 reference clock between Bank 3A and Bank 3B

Check COD for EP4CE10F17C8N

Unable to Generate Valid PAM4 Eye Diagram and BER Measurements on Stratix 10 SI E-Tile Native PHY

Cyclone IV GX Invalid JTAG ID Code - EPCS32