Technical Product Specification

Connector/Header Locations and Pin-out Intel® Server Board S1600JP TPS
7.2.2
IPMB Header
Table 58. IPMB Header Pin-Out (J6A4)
Pin
Signal Name
1
SMB_IPMB_5VSB_DAT
2
GND
3
SMB_IPMB_5VSB_CLK
4
P5V_STBY
7.2.3
Power Button
The BIOS supports a front control panel power button. Pressing the power button initiates a
request that the Integrated BMC forwards to the ACPI power state machines in the chipset. It is
monitored by the Integrated BMC and does not directly control power on the power supply.
 Power Button — Off to On
The Integrated BMC monitors the power button and the wake-up event signals from the
chipset. A transition from either source results in the Integrated BMC starting the power-
up sequence. Since the processor is not executing, the BIOS does not participate in this
sequence. The hardware receives the power good and reset signals from the Integrated
BMC and then transitions to an ON state.
 Power Button — On to Off (operating system absent)
The System Control Interrupt (SCI) is masked. The BIOS sets up the power button event
to generate an SMI and checks the power button status bit in the ACPI hardware
registers when an SMI occurs.
If the status bit is set, the BIOS sets the ACPI power state
of the machine in the chipset to the OFF state. The Integrated BMC monitors power
state signals from the chipset and de-asserts PS_PWR_ON to the power supply. As a
safety mechanism, if the BIOS fails to service the request, the Integrated BMC
automatically powers off the system in four to five seconds.
 Power Button — On to Off (operating system present)
If an ACPI operating system is running, pressing the power button switch generates a
request through SCI to the operating system to shutdown the system. The operating
system retains control of the system and the operating system policy determines the
sleep state into which the system transitions, if any. Otherwise, the BIOS turns off
the system.
7.2.4
Reset Button
The platform supports a front control panel reset button. Pressing the reset button initiates a
request forwarded by the Integrated BMC to the chipset. The BIOS does not affect the behavior
of the reset button.
7.2.5
Chassis Identify Button
The front panel Chassis Identify button toggles the state of the chassis ID LED. If the LED is off,
pushing the ID button lights the LED. It remains lit until the button is pushed again or until a
Chassis Identify or a Chassis Identify LED command is received to change the state of
the LED.
156 Revision 1.9