BOXD845EBG2L Intel, BOXD845EBG2L Datasheet - Page 81

• Manufacturer Part Number: BOXD845EBG2L
• Manufacturer: Intel

Specifications of BOXD845EBG2L

• Lead Free Status / Rohs Status: Supplier Unconfirmed

2.11.3 Standby Current Requirements
CAUTION
If the standby current necessary to support multiple wake events from the PCI and/or USB buses
exceeds power supply capacity, the Desktop Boards D845EBG2 and D845EPT2 may lose register
settings stored in memory, etc. Calculate the standby current requirements using the steps
described below.
Power supplies used with the Desktop Boards D845EBG2 and D845EPT2 must be able to provide
enough standby current to support the Instantly Available PC (ACPI S3 sleep state) configuration
as outlined in Table 50 below.
Values are determined by specifications such as PCI 2.2. Actual measured values may vary.
To estimate the amount of standby current required for a particular system configuration, standby
current requirements of all installed components must be added to determine the total standby
current requirement. Refer to the descriptions in Table 50 and review the following steps.
1. Note the total Desktop Board D845EBG2 or D845EPT2 standby current requirement.
2. Add to that the total PS/2 port standby current requirement if a wake-enabled device is
3. Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices
4. Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices
5. Add all additional wake-enabled devices’ and nonwake-enabled devices’ standby current
6. Add all the required current totals from steps 1 through 5 to determine the total estimated
Table 50.
Notes:
Instantly Available PC Current
Support (Estimated for
Integrated Desktop Board
Components)
Instantly Available PC Stand-by
Current Support
•
•
(See instructions above)
connected.
installed (PCI and AGP) and multiply by the standby current requirement.
installed (PCI and AGP) and multiply by the standby current requirement.
requirements as applicable.
standby current power supply requirement.
1.
2.
3.
Estimated for add-on
components
Add to Instantly Available
PC total current
requirement
This total is based on a system configuration not including audio or LAN.
Dependent upon system configuration.
40 mA for the Desktop Board D845EPT2.
100 mA for the Desktop Board D845EBG2.
Standby Current Requirements
Description
Total for Desktop Board
D845EBG2
PS/2 ports
PCI 2.2 slots (wake enabled)
PCI 2.2 slots (nonwake enabled)
CNR
USB ports
(Note 2)
(Note 2)
(Note 2)
Standby Current
Requirements (mA)
220 mA
345 mA
375 mA
(Note 3)
375 mA
500 mA
(Note 1)
Technical Reference
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