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SKGR0
Beginner
239 Views

If I have a DDR4 -2400 (64-DQ pins) , configuring read/write data bit width as 64 in single channel mode I would receive 128bit data on request from DDR in a single clock Is my understanding correct?

If yes, Can I increase the bandwidth (more than 128 bits) , if I use a dual channel mode having a maximum of only 64 DQ bits?

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Deshi_Intel
Moderator
61 Views

HI,

 

If you configured DDR4 IP with 64 DQ data width, then at one clock cycle, you can transfer max 128 bits data due to double data rate (DDR) architecture.

 

DDR architecture works in a way where it will utilize both rising edge of clock and falling edge of clock to transfer data.

  • Meaning at clock rising edge, you transfer 64 bits
  • At the same clock falling edge. you transfer another 64 bits
  • That's why in one clock that contains both rising edge and falling edge, you get total of 128 bits transfer

 

I hope I clear your doubt.

 

Thanks.

 

Regards,

dlim

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