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DM8107 DDR3 controller

Mihir K Patel
Prodigy 150 points
Other Parts Discussed in Thread: DM8107

Hi team,

Can you please tell me what is operating frequency of data strobe signals ( DQS[0:3] ) in DM8107? Is it same as data rate (800 Mbps) or clock rate (400 MHz)?

Thanks in advance

Mihir

  • 0
    TI__Guru**** 393215 points
    Hi Mihir,
     
    DQS[0:3] are not clock signals. Quoting from a DDR3 datasheet:
     
    "The differential data strobe (DQS, DQS#) is transmitted externally, along with data, for use in data capture at the DDR3 SDRAM input receiver. DQS is center-aligned with data for WRITEs. The read data is transmitted by the DDR3 SDRAM and edge-aligned to the data strobes."
     
    In general DQS toggles with each data byte.