ZHCSIL6E June 2017 – March 2019 66AK2G12
PRODUCTION DATA.
The region of the PCB used for DDR3L circuitry must be isolated from other signals. The DDR3L keepout region is defined for this purpose and is shown in Figure 7-5. The size of this region varies with the placement and DDR3L routing. Additional clearances required for the keepout region are shown in Table 7-6. Non-DDR3L signals should not be routed on the DDR3L signal layers within the DDR3L keepout region. Non-DDR3L signals may be routed in the region, provided they are routed on layers separated from the DDR3L signal layers by a ground layer. No breaks should be allowed in the reference ground layers in this region. In addition, the DVDD_DDR power plane should cover the entire keepout region. Also note that the two signals from the DDR3L controller should be separated from each other by the specification in Table 7-6 (see KOD37).