This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM4378: DDR design issue,Could we use 2pcs 8bit or 1pcs16Bit Bus Width DDR ?

Part Number: AM4378

Hi  Ti

We saw some referent designs of AM437x with different DDR Sizes on the TI website.

#1. 1GB:2pcs 16Bit DDR3

#2. 2GB: 4Pcs 8Bit DDR3

My question is:

Could we use 1 pcs 16Bit DDR Only in the AM4378 system? How to modify the SW configuration

Same issue as #2, Could we use 2 pcs 8Bit DDR Only in AM4378 system?


  • Qin, yes, you can use only 16bits of the DDR interface, either to a single 16bit device or 2 8-bit devices.  Note, VTT-less design is only supported with a single 16-bit device (see figure 5-50 of datasheet).   Please refer to the AM437x datasheet, section, for supported topologies.  Software configuration for custom board designs should use the EMIF tool describe in this app note: