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Technical Reference

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NOTE

AGP and PCI requirements are calculated by totaling the following:

• One wake-enabled device @ 375 mA

• Three non-wake-enabled devices @ 20 mA each

PS/2 Ports requirements per the IBM PS/2 Port Specification (Sept 1991):

• Keyboard @ 275 mA (Actual measurements are 220 mA-300 mA, depending on the type of

keyboard and the operational state of the keyboard’s LEDs.)

• Mouse @ 70 mA

USB requirements are calculated by totaling the following:

• One wake-enabled device @ 500 mA

• Three USB non-wake-enabled devices @ 2.5 mA each

The USB ports are limited to a combined total of 700 mA.

CNR requirements are calculated as follows:

• One wake-enabled device @ 375 mA

• Non-wake-enabled devices @ 20 mA

2.11.4 Fan Connector Current Capability

The D815EEA2 and D815EPEA2 boards are designed to supply a maximum of 225 mA per fan

connector.

2.11.5 Power Supply Considerations

CAUTION

The +5 V standby line for the power supply must be capable of providing adequate +5 V standby

current. Failure to do so can damage the power supply. The total amount of standby current

required depends on the wake devices supported and manufacturing options. Refer to

Section 2.11.3 on page 94 for additional information.

System integrators should refer to the power usage values listed in Section 2.11.1, on page 92 when

selecting a power supply for use with either the D815EEA2 or D815EPEA2 board.

Measurements account only for current sourced by either the D815EEA2 or D815EPEA2 board

while running in idle modes of the started operating systems.

Additional power required will depend on configurations chosen by the integrator.

The power supply must comply with the following recommendations found in the indicated

sections of the ATX form factor specification.

• The potential relation between 3.3 VDC and +5 VDC power rails (Section 4.2)

• The current capability of the +5 VSB line (Section 4.2.1.2)

• All timing parameters (Section 4.2.1.3)

• All voltage tolerances (Section 4.2.2)

For information about Refer to

The ATX form factor specification Table 4, page 20

Intel D815EEA2 User Manual

Other manuals for Intel D815EEA2