Table 94. Pwok Signal Characteristics; Table 95. Smbalert# Signal Characteristics - Intel SC5299BRP Technical Product Specification

Power Sub-system
Signal Type
PWOK = High
PWOK = Low
Logic level low voltage, Isink=4mA
Logic level high voltage, Isource=200 A
Sink current, PWOK = low
Source current, PWOK = high
PWOK delay: T
pwok_on
PWOK rise and fall time
Power down delay: T
2.4.5.4 SMBAlert#
This 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 A
Sink current, Alert# = low
Sink current, Alert# = high
Alert# rise and fall time
78

Table 94. PWOK Signal Characteristics

pwok_off

Table 95. SMBAlert# Signal Characteristics

Intel order number D37594-005
®
Intel Entry Server Chassis SC5299-E 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
100 sec
200msec
MAX
0.4 V
5.25 V
4 mA
50 A
100 s
Revision 3.1