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Mar 27, 2013
07:30 PM
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Mar 27, 2013
07:30 PM
"Reference Schematic Design Recommendation for QDR-DDR II/II+/Xtreme SRAMs - KBA84386" www.cypress.com/ states that Vtt and Vref are both VDDQ/2, but that they have separate capacitor banks. Why the distinction?https://www.cypress.com/?id=4&rID=72249
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Mar 28, 2013
12:52 AM
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Mar 28, 2013
12:52 AM
Hi,
It is better to have two different circuits for generating VTT and Vref. In this case the voltage variations becasue of Vterm will not affect Vref.
So separate decoupling network for VTT and Vref is preffered.
Thanks
2 Replies