In high-speed circuit boards, eMMC is one of the most common and critical components, so properly routing eMMC is essential for the stable operation of the system!This article only focuses on PCB routing and does not involve schematic design!1: Layout(1) Place the eMMC close to the main controller, ideally within 2000 mil.(2) Place the capacitors and resistors around the eMMC close to the eMMC body.2: Routing(1) eMMC has strict power requirements, with power ripple controlled below 80mV, so the power line of eMMC should be kept away from high-speed signal lines. Typically, a dedicated power layer is used for routing, while other high-speed signal lines are routed on different layers.(2) It’s best to ground the entire group of eMMC lines, with a length matching requirement of ±100 mil.(3) The CLK line should be routed separately and grounded.The difficulty of eMMC layout and routing is relatively low! As long as the above points are noted, the operational requirements can generally be met!If you need PCB Layout training and certification, you can scan the QR code in the image below for details, or add me on WeChat for consultation, or check out the article below:Walnut’s First Recruitment for PCB Learning!
