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M. Jeong
M. Jeong
Associate III
July 3, 2016
Question

Maximum data rate of DCMI in 12-bits mode

  • July 3, 2016
  • 1 reply
  • 533 views
Posted on July 03, 2016 at 13:09

What is the maximum data rate of the DCMI interface? When you use 10-bits mode, it is 54MB/s. But what about 12-bits mode? Is it 54Mz  x 12-bits /8-bits = 81MB/s ?

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    1 reply

    Tesla DeLorean
    Tesla DeLorean
    Guru
    July 3, 2016
    Posted on July 03, 2016 at 14:18

    The documentation is a bit vague, in places it talks about 54 MHz for the clock, and others in talks about 54 MBps for the data flows. It is packing the data to 32-bit to commit to DMA, and the bandwidth there would limit to top end.

    I'm leaning in the same direction as you, that the interface clocks at 54 MHz, so 14-bit data would look to yield 94.5 MBps, with the 32-bit words clocking out at 23.625 MHz

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