FX3 AN75779 Active Low FV case

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
selac_2609551
Level 1
Level 1

Hi, I'm developing USB3.0 cam solution using FX3. I'm testing codes on my board following AN75779, and there is some confusing point.

FV, LV signals are active high in the example. In my board, I'm using vertical sync(short pulses between frame) as FV, so I think it should be considered as active low.

In State machine, there are transitions using FV or !FV. The problem is this.  Is FV means real H signal in state diagram or activated signal?

I have input this signal as active low in interface definition, so activated state means L signal.

This is quite confusing. Please somebody who know this help me.

0 Likes
1 Solution
ManaskantD_51
Employee
Employee
Welcome! 25 solutions authored 10 solutions authored

FV means real HIGH signal.

View solution in original post

0 Likes
1 Reply
ManaskantD_51
Employee
Employee
Welcome! 25 solutions authored 10 solutions authored

FV means real HIGH signal.

0 Likes