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P5040/P5020 Reference Design Board User Guide, Rev. 0
Freescale Semiconductor
37
Architecture
SW1/6 = “0” (DDR3L low power)
•
DDR3L default GVDD = 1.35V
•
M_VTT = 0.675V
•
M_VREF = 0.675V
5.3.1.4
LVDD
GETH LVDD voltage is set to 2.5V.
5.3.1.5
CVDD
CVDD voltage has these characteristics:
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Powers SD and SPI interfaces.
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Used to define IO_VSEL P5020 configuration pins setting.
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CVDD selection of 1.8, 2.5, or 3.3V is made by correctly setting J11.
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IO_VSEL is done automatically in compliance with selected CVDD values.
5.3.1.6
XVDD
XVDD voltage has these characteristics:
•
Powers the SERDES block IO.
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Voltage value is set to 1.5 or 1.8V using SW3[5] or a corresponding FPGA control bit.
5.3.1.7
VDD_CORE
VDD_CB voltage has the following characteristics:
•
Powers both cores A and B of P5040/P5020 Rev 1.0 and 2.0 devices.
•
Set SW6[7] to “0” to turn off voltage. The voltage connected/disconnected from corresponding
power plane in conjunction with selected PDN options (see
)
5.3.1.8
POVDD
•
Possible to set to 0V, 1.0V, or 1.5V.
•
SW3[8] controls ON/OFF status of POVDD onboard secondary PS.
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SW8[6] selects desired POVDD value.
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J21 connects POVDD power line to a selected voltage OR “shorts” it to the GND plane.
5.3.1.9
BVDD & OVDD
BVDD (eLBC block) and OVDD (general IO) voltages are set to 3.3V.