SPRS989F December 2016 – December 2018 DRA74P , DRA75P
PRODUCTION DATA.
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VREF (ddrx_vref0) is used as a reference by the input buffers of the DDR2 memories as well as the processor. VREF is intended to be half the DDR2 power supply voltage and should be created using a resistive divider as shown in Figure 7-51. Other methods of creating VREF are not recommended. Figure 7-54 shows the layout guidelines for VREF.