JAJSE41G June 2016 – March 2019 TDA3LA , TDA3LX , TDA3MA , TDA3MD , TDA3MV
PRODUCTION DATA.
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VREF (ddrx_vref0) is used as a reference by the input buffers of the DDR2 memories. VREF is intended to be half the DDR2 power supply voltage and should be created using a resistive divider as shown in Figure 8-39. Other methods of creating VREF are not recommended. Figure 8-42 shows the layout guidelines for VREF.