DM814x LPDDR hookup

Stephen Turner

My design uses a x32 LPDDR (Mobile DDR). Do you have any info on how to hook up a mDDR device to the memory controller?.

I suppose all will be revealed in the "TMS320DM814x DMSoC LPDDR/DDR2/DDR3 Memory Controller User's Guide". When will that be available?.

thanks

steve

over 14 years ago

0 Stephen Turner over 14 years ago

Genius 3476 points

Attached is my schematic so far. Question is what happens to DDR0: VTP and DDR0: VREFSSTL pins?

-steve

5460.TI814x_LPDDR.pdf

0 Stephen Turner over 14 years ago in reply to Stephen Turner

Genius 3476 points

I have figured out that the VTP pin is tied to GND through 49.9R, but what about the VREFSSTL pin?

thanks

steve

0 Stephen Turner over 14 years ago in reply to Stephen Turner

Genius 3476 points

OK, I figured out the last bit from another TI doc for a different device that also uses LPDDR. The VREF is connected to a resistor divider that generates 0.9V from the 1.8V LPDDR supply.

-steve

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DM814x LPDDR hookup