Intel D845GLLY D845GLLY_ProductSupplement - Page 28

Product Supplement Document for the Intel Desktop Board D845GLLY ✏ NOTE IBM PS/2 Port Specification (Sept 1991) states: • 275 mA for keyboard • 70 mA for the mouse (nonwake-enable device) PCI requirements are calculated by totaling the following: • One wake-enabled device @ 375 mA, plus • Three nonwake-enabled devices @ 20 mA each, plus USB requirements are calculated as: • One wake-enabled device @ 500 mA • USB hub @ 100 mA • Three USB nonwake-enabled devices connected @ 2.5 mA each ✏ NOTE Both USB ports are capable of providing up to 500 mA during normal G0/S0 operation. Only one USB port will support up to 500 mA of stand-by-current (wake-enabled device) during G1/S3 suspended operation. The other port may provide up to 7.5 mA (three nonwake-enabled devices.) during G1/S3 suspended operation. 2.6.4 Fan Connector Current Capability Table 21 lists the current capability of the fan connectors on the Desktop Board D845GLLY. Table 21. Fan Connector Current Capability Fan Connector Maximum Available Current Processor fan 1 A Front chassis fan 1 A Rear chassis fan 1 A 2.6.5 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 2.6.3 on page 27 for additional information. System integrators should refer to the power usage values listed in Table 19 when selecting a power supply for use with the Desktop Board D845GLLY. Measurements account only for current sourced by the Desktop Board D845GLLY while running in idle modes of the started operating systems. Additional power required will depend on configurations chosen by the integrator. 28