PCI-SIG and MIPI Alliance Reveal Mobile PCIe Specification

Discussion in 'Mobile Industry' started by ToTTenTranz, Mar 6, 2013.

  1. ToTTenTranz

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    PCI-SIG and MIPI Alliance Reveal Mobile PCIe Specification

    Could this mean an end to the dirt-slow eMMC we get even in the highest-end handhelds?
     
  2. Nebuchadnezzar

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    No.

    I don't see what the relation between this and eMMC speed, they are slow in handhelds because of lack of parallelism because they only have a single IC with only a couple (correct me here) of memory dies. They are also directly connected to the SoC, so I doubt it's some sort of bottleneck in the interface itself.
     
  3. ToTTenTranz

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    If it was that linear, mPCIe wasn't being implemented and they wouldn't brag about faster I/O speeds in the press release.
     
  4. Turbotab

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  5. silent_guy

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    PCIe over a MIPI phy is probably just another PHY layer for PCIe, the way you can put PCIe over Thunderbolt. It means that existing higher level software stacks should just work.

    I suppose one way or the other this can be beneficial for flash storage, but I highly doubt this is a first order driver for doing this. PCIe is too heavy a protocol to just serve ordinary flash chips.

    Now why you'd want this over MIPI instead of the regular PCIe PHY is a different question. I believe MIPI PHYs are easier and lightweight (and lower clock?), so it should be a better choice in terms of power and design complexity than regular PCIe?
     
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