user manual

The Hot Swap Controller/Bridge (HSC) Module
http://www.motorola.com/computer/literature 1-5
1
Figure 1-4. CPX8216 I/O Bus Connectivity
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 1-2 and Figure 1-3. 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 System. 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 system module
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
I/O
S
L
O
T
C
P
U
C
P
U
H
S
C
H
S
C
Special Backplane
Primary CompactPCI
Buses
I/O Domain A
I/O Domain B
A
B
A
B
PCI Interconnects