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P5040/P5020 Reference Design Board User Guide, Rev. 0
36
Freescale Semiconductor
Architecture
Figure 18. P5040/P5020RDB PDN Options
5.3.1.3
DDR
DDR SDRAM GVDD, termination (M_VTT) and reference (M_VREF) voltages are automatically set at
the noted limits, depending on SW1[6] "DRAM TYPE" following power on:
SW1[6] = “1” (DDR3 regular)
•
DDR3 default GVDD = 1.5V
•
M_VTT = 0.75V
•
M_VREF = 0.75V