Intel D845PT Intel Desktop Board D845PT/D845BG Product Guide - Page 22

Wake from USB, Wake from PS/2 Keyboard/Mouse, PME# Wakeup Support

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Intel Desktop Boards D845PT and D845BG Product Guide Table 4. Standby Current Requirements Instantly Available Current Support Estimate for integrated board components Estimate for add-on components (Add to integrated board components shown above) Description Total for the D845PT or D845BG board PS/2 ports** PCI 2.2 slots (wake-enabled) PCI 2.2 slots (non-wake-enabled) CNR** (wake enabled) CNR** (non-wake-enabled) USB ports** Standby Current Requirements (mA) 770* 345 375 100 875 40 700 * Refer to the Intel Desktop Board D845PT/D845BG Technical Product Specification for the exact standby current requirements ** Dependent upon system configuration ✏ NOTE PCI requirements are calculated by totaling the following: • One wake-enabled device @ 375 mA. • Five non-wake-enabled devices @ 20 mA each. PS/2 Ports requirements per the IBM PS/2 Port Specification (Sept 1991): • Keyboard @ 275 mA. • Mouse @ 70 mA. USB requirements are calculated by totaling the following: • One wake-enabled device @ 500 mA. • USB hub @ 100 mA. • Three USB non-wake-enabled devices @ 2.5 mA each. • The USB ports are limited to a combined total of 700 mA. Wake from USB USB bus activity wakes the computer from an ACPI S1 or S3 state. ✏ NOTE Wake from USB requires the use of a USB peripheral that supports Wake from USB. Wake from PS/2 Keyboard/Mouse PS/2 keyboard/mouse activity wakes the computer from an ACPI S1 or S3 state. PME# Wakeup Support When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, or S5 state. 22

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Intel Desktop Boards D845PT and D845BG Product Guide
22
Table 4.
Standby Current Requirements
Instantly Available Current
Support
Description
Standby Current
Requirements (mA)
Estimate for integrated board
components
Total for the D845PT or D845BG
board
770*
PS/2 ports
**
345
PCI 2.2 slots (wake-enabled)
375
PCI 2.2 slots (non-wake-enabled)
100
CNR** (wake enabled)
875
CNR** (non-wake-enabled)
40
Estimate for add-on components
(Add to integrated board
components shown above)
USB ports
**
700
*
Refer to the Intel Desktop Board D845PT/D845BG Technical Product Specification for the exact standby current
requirements
** Dependent upon system configuration
✏
NOTE
PCI requirements are calculated by totaling the following:
•
One wake-enabled device @ 375 mA.
•
Five non-wake-enabled devices @ 20 mA each.
PS/2 Ports requirements per the IBM PS/2 Port Specification (Sept 1991):
•
Keyboard @ 275 mA.
•
Mouse @ 70 mA.
USB requirements are calculated by totaling the following:
•
One wake-enabled device @ 500 mA.
•
USB hub @ 100 mA.
•
Three USB non-wake-enabled devices @ 2.5 mA each.
•
The USB ports are limited to a combined total of 700 mA.
Wake from USB
USB bus activity wakes the computer from an ACPI S1 or S3 state.
✏
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
Wake from PS/2 Keyboard/Mouse
PS/2 keyboard/mouse activity wakes the computer from an ACPI S1 or S3 state.
PME# Wakeup Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, or
S5 state.