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Atlas 200 Hardware Development Guide 02

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SD/eMMC Interface

SD/eMMC Interface

Table 4-3 PCB design requirements


Design Requirement


PCB routing impedance

40 ohm to 50 ohm.


Source end matching

22 ohm to 33 ohm.

The RX matches the TX source end. The resistance can be optimized based on the simulation and test results.

Routing length

< 5 inches.

> 5 inches (to be determined by simulation).

Reference plane

Ground plane, no cross-plane splits.


Timing Control

No strict timing control.


Updated: 2019-07-29

Document ID: EDOC1100079542

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