53 platform routing points The following issues should be considered in the early stage of routing planning, otherwise it will be troublesome to adjust later. 1. The CAMER data line (yellow dot) and the screen data line (white dot) are very close at the BB end, so do not run them in parallel. [pic]2. Avoid running the three RF control lines (yellow dot) and RF 26M, BT_26M (white dot) in parallel when they are outgoing, and the vias should not intersect. [pic][pic]3. 53 integrates Transeiver and PMU. Try not to run or run as few lines as possible on the second layer under the BB to ensure that there is a relatively large ground and connected to the outside ground for heat dissipation; the 4th and 5th layer lines under it should not be too concentrated, which will affect the drilling of 2-5 holes. Reference is as follows: [pic]4. After the 53 platform is changed back to true differential, the device in the frame below is placed close to the BB, so that there can be one less MICBIAS protection on the path to the MIC pad. All platforms can do this. As shown in the schematic diagram: [pic]LAYOUT reference: [pic]……
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