Artesyn Embedded Technology 6806800R89E, Сборка, установка и использование

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SharpMedia PCIE-8120 Hardware Description
SharpMedia™ PCIE-8120 Installation and Use (6806800R89F )
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The SharpMedia PCIE-8120 uses seven DC/DC building blocks to provide the necessary
operating voltages that are required by the devices on the board.

Main voltage supply comes from the 12V card edge or ATX 6-Pin connector via the
assembly option. For more information, see
P2 External ATX 6-Pin Power Connector (only on
-N versions) on page 64 .

3.3V from card edge supplies power-up control circuitry.

3.3V aux is not used (no wake capability).

Current/voltage/power monitor, see I/V/P Sensors on page 83 .

Card power management control by CPLD, see Card Power Management on page 79 .
According to the PCI Express Card Electromechanical Specification Rev.2.0.2007.PCISIG CEM
2.04/11/2007, the PERST# signal indicates a system power good status combined with a card
reset function. Therefore, it cannot be used as a power good signal to the cards power-up
control for the local DC/DC units. To keep up with the timing requirements for the PERST#
signal, the local power control must enable the DC/DC units immediately after card edge
power appears. An undervoltage-lockout circuitry is used to provide a status signal that
indicates when the 12V main supply is within the allowed range:

DC/DC enable for VP12 > 11.08V (calculated)

DC/DC disable for VP12 < 8.5V (calculated)