RK3288 Hardware Design Guide
For the topological structure which has branches, such as DDR3, place a NC resistor
0402 between DDR_CLK and DDR_CLKn, and it should be placed close to the branch
point of DDR clock trace as possible.
Fig 8-6
VCC_DDRC is turned off by MOS Transistor in order to reduce power consumption in
deep sleep, as shown in Fig 8-7. In LPDDR2/3 mode, a N MOS Transistor Q3100
should be added to avoid low-voltage（1.2V）power supply for VCC_DDRC, which will
block transmission of MOS as shown in Fig 8-8.
Fig 8-7
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