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C67x Single Core DSP Forum
C6747 EMIFB sdram interface, series termination required?
I am working on a C6747 schematic design, using the EVM schematic as a reference. I notice the EVM board uses series resistors on all sdram signals. I did not find any recommendations for such in TI technical reference literature. I remember a design from many years ago on the Intel StrongArm processor where series resistors were required on address lines, however of my more recent sdram interface designs series resistors have not been required or even suggested. There are downsides to using series resistors, mainly the additional solder connections and vias required, as well as having to break the signals to the surface rather than a clean run straight to memory on an inner layer.
Does anyone have any information or guidance they can share in this regard?
Our recommendation would be to do a board simulation using the IBIS model to see if series resistors are needed for your design. I suspect that since the EVM used them that it will be best for you to do so also.
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Fair enough. Thanks for the reply.
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