Motorola CPCI-6115 Manuel de service télécharger pdf (Page 27)

Chapter 2 System Architecture

CPX8216 and CPX8216T Installation and Use (6806800A52C)

Bus Access and Control

In the fully redundant configuration, the CPU in the left system slot, CPU A, is associated with

the HSC in the right HSC slot, HSC A (note that HSC A actually sits on the Domain B bus).

There is a local connection between each CPU-HSC pair that allows the CPU in one domain to

control the other domain through its HSC. This architecture is illustrated in the following figure.

In addition to providing bridges to the remote I/O buses, the HSC provides the services

necessary to hot swap CPU boards and nonhost processor boards and also controls the system

alarm panel, fans, and power supplies.

The Hot Swap Controller/Bridge (HSC) Module

The HSC module connects to the CPU module through a local PCI bus, as illustrated in Figure

2-2 on page 5 and Figure 2-3 on page 6. The HSC module contains a PCI-to-PCI bridge and

also contains a Hot Swap Controller.

The functionality provided by the HSC is at the heart of the High Availability CPX8216

Platforms. Its primary functions include:

■ Providing a bridge between the two eight-slot CompactPCI buses so that they can be

managed by a single CPU module

■ Maintaining a Control Status Register which contains information on the status of each

chassis module

■ Controlling power and resets to each chassis module through radial connections

■ Monitoring and controlling CPU boards, nonhost boards, and peripherals, including power

and fan sleds, board and system LEDs, and alarms

Figure 2-4. CPX8216 I/O Bus Connectivity

4284 0504

CPU

HSC Bridge

I/O Slot

None

I/O Domain A I/O Domain B

Primary Compact

PCI Buses

Special Backplane PCI Interconnects

A B B A

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Motorola CPCI-6115 Manuel de service Page 27