Intel SE7525GP2 Product Specification - Page 126

Power-up Sequence, 3.1.2, Power-down Sequence, 3.1.3, Power Control Sources

Page 126 highlights

Platform Management Intel® Server Boards SE7320SP2 and SE7525GP2 5.3.1.1 Power-up Sequence When turning on the system power in response to one of the event occurrences listed in Table 53 below, the mBMC executes the following procedure: ƒ The mBMC asserts Power On and waits for the power subsystem to assert Power Good. The system is held in reset. ƒ The mBMC sends a Set ACPI Power State command, indicating an S0 state to all management controllers whose SDR management device records indicate that they should receive the notification. ƒ The mBMC initializes all sensors to their Power On initialization state. The Init Agent is run. ƒ The mBMC attempts to boot the system by running the FRB algorithm. 5.3.1.2 Power-down Sequence To power down the system, the mBMC effectively performs the sequence of power-up steps in reverse order. This operation can be initiated by one of the event occurrences listed in Table 53 and proceeds as follows: ƒ The mBMC asserts system reset (de-asserts Power Good). ƒ If enabled, the mBMC sends a Set ACPI Power State command, indicating an S0 state to all management controllers whose SDR management device records indicate that they should receive the notification. ƒ The mBMC de-asserts the Power On signal. ƒ The power subsystem turns off system power upon de-assertion of the Power On signal. 5.3.1.3 Power Control Sources The sources listed in the following table can initiate power-up and/or power-down activity. Table 53. Power Control Initiators # Source 1 Power Button External Signal Name or Internal Subsystem FP Power button Capabilities Turns power on or off 2 mBMC Watchdog Timer Internal mBMC timer Turns power off, or power cycle 3 Platform Event Filtering PEF Turns power off, or power cycle 4 Command Routed through command processor Turns power on or off, or power cycle 5 Power state retention Implemented via mBMC internal logic Turns power on when AC power returns 6 Chipset Sleep S5 Turns power on or off 114 Revision 4.0

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Platform Management
IntelĀ® Server Boards SE7320SP2 and SE7525GP2
Revision 4.0
114
5.3.1.1
Power-up Sequence
When turning on the system power in response to one of the event occurrences listed in
Table 53 below, the mBMC executes the following procedure:
The mBMC asserts
Power On
and waits for the power subsystem to assert
Power Good
.
The system is held in reset.
The mBMC sends a
Set ACPI Power State
command, indicating an S0 state to all
management controllers whose SDR management device records indicate that they
should receive the notification.
The mBMC initializes all sensors to their
Power On
initialization state. The Init Agent is
run.
The mBMC attempts to boot the system by running the FRB algorithm.
5.3.1.2
Power-down Sequence
To power down the system, the mBMC effectively performs the sequence of power-up steps in
reverse order. This operation can be initiated by one of the event occurrences listed in Table 53
and proceeds as follows:
The mBMC asserts system reset (de-asserts
Power Good
).
If enabled, the mBMC sends a
Set ACPI Power State
command, indicating an S0 state
to all management controllers whose SDR management device records indicate that
they should receive the notification.
The mBMC de-asserts the
Power On
signal.
The power subsystem turns off system power upon de-assertion of the
Power On
signal.
5.3.1.3
Power Control Sources
The sources listed in the following table can initiate power-up and/or power-down activity.
Table 53. Power Control Initiators
#
Source
External Signal Name or
Internal Subsystem
Capabilities
1
Power Button
FP Power button
Turns power on or off
2
mBMC Watchdog Timer
Internal mBMC timer
Turns power off, or power cycle
3
Platform Event Filtering
PEF
Turns power off, or power cycle
4
Command
Routed through command processor
Turns power on or off, or power cycle
5
Power state retention
Implemented via mBMC internal logic
Turns power on when AC power returns
6
Chipset
Sleep S5
Turns power on or off