
O
UTREACH
PCI/PMC E
XPANSION
S
YSTEM
U
SER
’
S
M
ANUAL
C
URTISS
-W
RIGHT
C
ONTROLS
E
MBEDDED
C
OMPUTING
1-4
809524 R
EVISION
D F
EBRUARY
2009
PCI-P0 B
RIDGE
D
ESCRIPTION
21554 PCI-
TO
-PCI-B
RIDGE
C
ONTROLLER
The PMC-605 uses the Intel 21554 Embedded PCI-to-PCI Bridge device. The 21554 is a non-
transparent PCI-to-PCI bridge designed to connect multiple processor domains, enabling the
host basecard to independently configure and control the local subsystem.
P
RIMARY
AND
S
ECONDARY
PCI B
USES
The PMC-605’s Primary PCI bus runs through the P4 connector to the P0 connector on the
basecard. The Primary PCI bus runs at 33 MHz and supports 32-bit addressing and data
transfers.
The Secondary PCI bus is connected to the host basecard’s local PCI bus. The Secondary PCI
bus runs at 33 MHz and supports 64-bit addressing and data transfers.
F
IGURE
1.3: Primary and Secondary PCI Buses
Cross Reference
The 21554 responds to Type 0 configuration cycles. For information about this device refer
to the Intel’s Getting Started with the 21554 Embedded PCI-to-PCI Bridge Application
Note, document #278210-001. Manuals and data sheets on the 21554 can be downloaded
from Intel’s website at http://developer.intel.com.
PCI Bridge
PMC-605
Module
Secondary PCI Bus
(Local Host PCI Bus)
Pn4
Pn1
Pn2
Host
Basecard
P0
VME
Backplane
(PCI-P0 bus)
Primary PCI Bus
Pn3
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