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Occasional ContributorArria 10 GX RX max intra-differential pair skew
Hi,
I presume that tolerated maximal intra pair skew is larger than guessed numbers. I see specification of up to 0.4 Tbit skew in HDMI 1.4 spec, expect that Arria 10 transceiver has no problem to decode the signal.
As far as I understand, Altera doesn't specify RX max intra pair skew. I also don't think that intra pair skew is a primary parameter in receiver performance analysis. It translates into differential mode pulse distortion and unwanted common mode signal. Related to specified receiver parameters, minimal eye opening is the nearest relevant parameter.
To determine HDMI compliance, I would either model expected input waveform with maximal skew and check eye opening. Or test receiver performance in real hardware.
Regards Frank
Occasional ContributorHi,
To pass HDMI PHY compliance, for instance at 3G rate the RX must be able to function with 80 ps of intra-lane skew. As you can see, your 5 ps figure cannot be correct, otherwise the Arria 10 RX would not be usable to implement an HDMI receiver.
Comments?
