Sun Microsystems SPARCengine Ultra AXi, Technical Manual

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Chapter 2 Specification Summary 2-11
2.1.14.3 Voltage Monitoring
Voltages Monitored +5VDC at Power Supply
DC-to-DC converter core voltage output
Function POWER_GOOD singal indicates to the Operating
System when the voltages are within their
±
10% limits
Limits Power supply: 4.5 VDC to 5.5 VDC
DC-to-DC converter: see
TABLE 2-2
2.1.15 Default Power On/Off Jumper
This jumper is available on -08 and later versions of Ultra AXi.
Motherboard Jumper J3303
Factory default setting Default power on (pins 4 and 6 jumpered)
System is powered ON when power is connected to
the power supply.
Note –
If the system is ON when power is disconnected from the power supply, the
system always powers ON again when power is reconnected to the power supply no
matter how short the power-off time.
If the system is OFF when power is disconnected from the power supply, however,
wait at least 10 seconds before reapplying power to the power supply.
TABLE 2-2
DC-to-DC Converter Core Voltage Output
DC-to-DC
Converter Output
(Core Voltage)
Input Range Used for
POWER_GOOD Signal
CPU Module
Part Number Speed
2.6 V 2.34 VDC to 2.86 VDC 501-5039-xx 270 MHz
501-5040-xx 300 MHz
501-5090-xx 333 MHz
501-5222-xx 360 MHz
1.9 V 1.71 VDC to 2.09 VDC 501-5148-xx 360 MHz
501-5149-xx 440 MHz