How to meet the Setup Time and Hold Time of SDRAM?

[健鸿凌]

01. How to meet the  Setup Time and  Hold Time of SDRAM?

02. Just follow the means of routing all signals at the same length (±50 mils)?

03. How to understand the Symbol of   TDVO and  TDHO？

[Yuri]

Hello,

  Usually setup and hold time parameters concern inputs,

for outputs delays are used.

Looking at the figure 14 above:

Setup time is period of SEMC clock / 2 - TDVO;

Hold time is period of SEMC clock / 2 + TDHO.

Have a great day,

Yuri

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