4-4
Computer Group Literature Center Web Site
Functional Description
4
Peripheral Reset Function
In peripheral mode the PCI reset signal comes from the CompactPCI bus
through the bridge to reset all on-card functions. You can reset the card
independently without affecting other cards in the system.
Peripheral PCI Interrupt Function
In peripheral mode the PCI interrupts route as shown below. The Intel
21555 bridge’s primary interface can generate a system interrupt via the
INTA- line on the CompactPCI bus. Local and host CPUs can generate an
interrupt to the other CPU via the Intel 21555’s primary and secondary
doorbell interrupts.
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Reset Control
Chipset
Cpu Reset
Local PCI Reset
RST-
PRST
SRST
Intel 21555
Bridge
Co
m
p
a
c
tP
CI
B
u
s
2669 9911
Local
INTA-
PINT
SINT
Intel 21555
Bridge
PCI Bus
&
Chipset
INTA-
Software Control
INTD-
INTC-
INTB-
Com
pact
P
CI
B
u
s