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DDR Memory on AM335X EVM

shiwei luan
Intellectual 750 points
Other Parts Discussed in Thread: AM3358

Hi, there are 2 DDR2 memory ICs on AM335X EVM, 8 bit for each so totally 16bit.

On my old PC, there are 4 white color memory sockets, where I put 2 *512MB DDR3 memory with other 2 slots empty.

What I am understanding from AM335X EVM is that each 8-bit data group from SDRAM IC is directly connected to AM3358, using fly-by topology instead of T-branch. (Beaglebone Black is using one DDR3 IC)

But what are the data lines routed on the  PC with DDR3? For example, I can use one 1G DDR3 memory, or use two 512M DDR3, since each memory slot is 32 bit, if I use two 512M, does these two memories share same data lines? Why there are 4 DDR3 memory slots on my 32bit PC?

Thank you.

  • 0
    TI__Guru**** 161600 points

    Hi Shiwei,

    Not sure what is your PC, but it probably can support up to four DDR3 memories (perhaps up to 8GB each, that depends on your motherboard & CPU, you can check that by a simple google search) one per each slot. I cannot be sure what is the PCB topology on your motherboard.

    shiwei luan said:
    if I use two 512M, does these two memories share same data lines

    That would depend on the memory interface of your CPU. 

    However, please note that this forum supports technical questions (HW & Linux) for AM335x, AM437x & AM572x devices, we DO NOT support general HW questions. Please use community forums such as stack overflow for questions about your PC architecture.


    Best Regards,
    Yordan