Aaeon EMB-H81B - Serial ATA 3 Gb;s Connectors; Power Supply Considerations

EMB-H81B
2-26
20. Serial ATA 3Gb/s connectors (7-pin SATA3G_1)
ThisconnectorconnectstoaSerialATA3Gb/sharddiskdriveoranoptical
driveviaaSerialATA3Gb/ssignalcable.
NOTE: YoumustinstallWindows
®
XPServicePack3orlaterversionbefore
usingSerialATAharddiskdrives.
EMB-H81B SATA 3.0Gb/s connector
SATA3G_1
GND
RSATA_RXP1
RSATA_RXN1
GND
RSATA_TXN1
RSATA_TXP1
GND
2.8 Power Supply Considerations
CAUTION!
• TheexternalDCjack(5.5/2.5mm)istheprimarypowerinputconnectorof
EMB-H81B.However,thedesktopboardalsoprovidesaninternal2x2
powerconnectorthatcanbeusedincustom-developedsystemsthathave
an internal power supply.
• ThereisnoisolationcircuitrybetweentheexternalDCjackandtheinternal
2x2powerconnector.Itisthesystemintegrator’sresponsibilitytoensure
no more than one power supply unit is or can be attached to the board at
anytimeandtoensuretheexternalDCjackiscoverediftheinternal2x2
power connector is to be used.
• Simultaneousconnectionofbothexternalandinternalpowersupplyunits
couldresultinpotentialdamagetothedesktopboard,powersupplies,or
other hardware.
• Systempowerrequirementswilldependonactualsystemcongurations
chosenbytheintegrator,aswellasenduserexpansionpreferences.It
isthesystemintegrator’sresponsibilitytoensureanappropriatepower
budgetforthesystemcongurationisproperlyassessedbasedonthe
system-levelcomponentschosen.
• ConsideringthepowerconversionefciencybetweenVin(+12V),theVout
(+12V)outputvoltageissetaround11.6V.