Aaeon EMB-H81B, Manual, Page: 34 / 52

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 configurations
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 configuration is properly assessed based on the
system-level components chosen.
• Considering the power conversion efficiency between Vin (+12V), the Vout
(+12V) output voltage is set around 11.6V.