Main Board Intel® Server System S7000FC4UR TPS
Revision 1.0
Intel order number E18291-001
10
2.2.4.4.1 PCI-Express* Hot-plug Power Controller
The main board uses the Texas Instruments* TPS2363 hot-plug controller. The Texas
Instruments* TPS2363 is a dual slot PCI-Express* hot plug controller providing support for 12V,
3.3V and 3.3Vaux power control. This support includes the following:
Current limiting
Voltage supervision
Fault indication
Independent slot control
The main board contains buttons and LEDs to assist a user with hot-plug operations. The
buttons can be used to initiate hot-plug events, while the LEDs provide slot power and hot-plug
status.
The LEDs have enough luminous intensity to pass through system-level light pipes and be
visible at the top of a system. An attention button can be used to invoke a hot-plug sequence to
remove or add an adapter without the use of an operating system/software interface.
Table 2. PCI Hot-plug LEDs
LED State Meaning
Off Power off: All main rails have been removed from slot. Card can be inserted or
removed.
On Power on: Slot is powered on. Card cannot be inserted or removed.
Power
(green)
Blinking Power transition: Slot is in the process of changing state. Card cannot be inserted or
removed.
Off Normal: Normal operation.
On Attention: Power fault or operational problem at this slot.
Attention
(amber)
Blinking Locate: Slot is being identified at the user’s request.
2.2.5 PCI 32-Bit Subsystem
2.2.5.1 PCI Interrupts
Legacy PCI devices can deliver interrupts either by asserting external IRQ signals that are
routed to the Enterprise Southbridge 2 or MSI via in-band messaging. In either case, the
Enterprise Southbridge 2 forwards the interrupt to the NB as an inbound write for the processor
to handle the event.
PCI INTx signals are mapped for the purpose of device interrupt load balancing. The specific
requirement is to ensure the following:
Interrupt controller receives INTx messages the represent the wire-ORed behavior and
interrupt routing of legacy PCI implementations
Software can determine at which interrupt controller input an interrupt is routed.
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