DDR3 memory capability of DM816x EVM

yuqing cai said:

The Technical Reference said the DDR3 memory capability is 2 Gigabyte,

but there are 8 1Gbit DDR3 memory chip in the schematics，It make me confused.

So what's the exactly memory capability on the board?

The DM8168 memory map summary in the datasheet indicates the total address space for DDR is 2G Bytes.  This is indicated in Table 2-26.  This is the maximum amount of DDR that can be used with the DM8168 which includes both DDR interfaces (DDR0 and DDR1).  The footnote (2) indicates this 2G Bytes can be allocated across the 2 instances of the DDR peripheral (ie. DDR0 and DDR1).

The AM389x/DM816x EVM from Spectrum Digital instantiates a total of 4x 1G bit memories (4 devices of 1Gb each) for each DDR interface.  As you mentioned, if you add this up for both DDR interfaces (DDR0 and DDR1), it provisions 8 1Gbit DDR3 memory devices for a total of 1GByte.

Hi,

On DM8168 base board we have 1G byte of memory. In your own hardware design you can extend it to 2GB but on reference boards we have 1GB of memory.

Regards,

Hardik Shah