Table 54. Pwok Signal Characteristics; Table 55. Smbalert# Signal Characteristics - Intel SC5650HCBRP Product Specification

Power Sub-system
4.2.4.2 PSKILL
The purpose of the PSKill pin is to allow for hot swapping of the power supply. The mating pin of
this signal on the cage input connector is tied to ground, and its resistance is less than 5 ohms.
4.2.4.3 PWOK (Power OK) Input and Output Signals
PWOK is a power OK signal and will be pulled HIGH by the power supply to indicate that all the
outputs are within the regulation limits of the power supply. When any output voltage falls below
regulation limits, or when AC power has been removed for a time sufficiently long so that power
supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. The start
of the PWOK delay time is inhibited as long as any power supply output is within current limit.
Signal Type
PWOK = High
PWOK = Low
Logic level low voltage, Isink=4mA
Logic level high voltage, Isource=200μA
Sink current, PWOK = low
Source current, PWOK = high
PWOK delay: T
pwok_on
PWOK rise and fall time
Power down delay: T
4.2.4.4 SMBAlert#
The SMBAlert# signal indicates that the power supply is experiencing a problem that the user
should investigate. The signal may be asserted due to critical events or warning events.
The SMBAlert# signal will be asserted whenever there is at least one event condition in the
power supply or cage.
The SMBAlert# signal will automatically be cleared when the cause of the event is no longer
present.
Signal Type (Active Low)
Alert# = High
Alert# = Low
Logic level low voltage, Isink=4 mA
Logic level high voltage, Isink=50 μA
Sink current, Alert# = low
90

Table 54. PWOK Signal Characteristics

pwok_off

Table 55. SMBAlert# Signal Characteristics

Intel order number E81443-002
Intel® Server System SC5650HCBRP TPS
Open collector/drain output from power supply. Pull-up to
VSB located in system.
Power OK
Power Not OK
MIN
0V
2.4V
100ms
1ms
Open collector / drain output from power supply.
Pull-up to VSB located in system.
OK
Power Alert to system
MIN
0 V
MAX
0.4V
5.25V
4mA
2mA
1000ms
100μsec
200msec
MAX
0.4 V
5.25 V
4 mA
Revision 1.2