hold check on half cycle paths

[vterminater]

I just have one question in the equation mentioned. I understand the equation for setup given above but what I don't understand is that for hold clock time period should not matter right. According to me the equation for hold should just be

Tc-q + Tcomb > Tskew+ Thold
This is because even in single cycle timing clk period is not considered for hold calculation. Is this a special case for half cycle timing?

Thank you for the detailed explanation.



Did you mean the amount of time the data must be stable 'after' the clock ?



I understand that,
launch path = Tc-q + Tcomb
but what is capture path component in the equation ? Is this the skew ? If yes, then here is the final equation. Let me know if they are correct.

Tclk/2 + Tskew >= Tc-q + Tcomb + Tsetup
Tclk/2 + Tc-q + Tcomb >= Thold + Tskew

 

[KaptainBug]

Hold time depends on clock when in half cycle.. Refer this link
https://vlsiuniverse.blogspot.com/2013/07/setup-and-hold-checks-static-timing.html

 

[vterminater]

Hold time depends on clock when in half cycle.. Refer this link
https://vlsiuniverse.blogspot.com/2013/07/setup-and-hold-checks-static-timing.html

Thank you. That was really helpful