Motorola CPX8216T User Manual
The Hot Swap Controller/Bridge (HSC) Module
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 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
illustrated in
and
. 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:
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
L
O
T
I/O
S
L
O
T
L
O
T
I/O
S
L
O
T
L
O
T
I/O
S
L
L
O
T
I/O
S
L
L
O
T
I/O
S
L
L
O
T
I/O
S
L
L
O
T
I/O
S
L
O
T
L
O
T
I/O
S
L
O
T
L
O
T
I/O
S
L
O
T
L
O
T
I/O
S
L
O
T
L
O
T
I/O
S
L
O
T
L
O
T
C
P
U
P
U
C
P
U
P
U
H
S
C
S
C
H
S
C
S
C
Special Backplane
Primary CompactPCI
Buses
I/O Domain A
I/O Domain B
A B
A
B
PCI Interconnects