
C
URTISS
-W
RIGHT
C
ONTROLS
E
MBEDDED
C
OMPUTING
SVME/DMV-210 C
ARRIER
C
ARD
809524 R
EVISION
D F
EBRUARY
2009
2-3
PCI-P0 B
RIDGE
D
ESCRIPTION
The SVME/DMV-210 uses the Intel 21154 PCI to PCI transparent bridge to connect the PMC
modules to the PCI-P0 bus. The bridge has a 32-bit, 25 MHz (minimum, 33 MHz typical)
Initiator-Target PCI primary interface and a 64-bit, 25 MHz (minimum, 33 MHz typical)
Initiator-Target PCI secondary interface. It is fully compliant with the PCI Specification,
Revision 2.1, and supports parity checking on both the PCI-P0 bus and the PMC bus.
The use of the 21154 PCI to PCI bridge decouples the PMC PCI bus from the P0 PCI bus. This
will permit concurrent bus activity to occur on the P0 bus and PMC PCI bus.
All devices on the SVME/DMV-210 are accessible in the PCI configuration space as well as
the PCI memory space and/or the PCI I/O space.
C
ONFIGURATION
The 21154 configuration registers are initialized from the PCI-P0 bus by the host processor.
The 21154 responds to both Type 0 and Type 1 configuration cycles to configure the bridge
itself and the PMC modules installed on the SVME/DMV-210 Carrier Card.
PCI S
IGNAL
E
NVIRONMENT
The 21154 is a +3.3 V device that is +5 V tolerant. Both the PCI-P0 bus and the PMC bus
can use 3.3 V or +5 V independently of each other.
The SVME/DMV-210 incorporates electronic bus switches that permit either 3.3V or a 5V PMC
modules to be added, with no need to change the configuration. 3.3V or 5V PMC modules
can be installed in either PMC module site on the SVME/DMV-210 in any combination.
PCI S
YSTEM
R
ESET
(RST#)
The PCI RST# signal from the PCI-P0 bus is used as the master reset for the SVME/DMV-
210. A low logic level on this signal resets the 21154 bridge and both PMC sites.
Reset signals are routed to the reset input of the primary PCI interface of the 21154 bridge.
The secondary reset output from the 21154 bridge is connected to the CPLD and individual
resets are routed to the two PMC sites.
PCI I
NTERRUPTS
The SVME/DMV-210 can generate a single interrupt (INTA#) to the processor card. The
source can be any of the four PCI interrupts from either of the two PMC modules. The
processor card can determine the source of the PCI interrupt by interrogating the individual
PMC modules installed on the SVME/DMV-210.
Cross Reference
For more information on the 21154 bridge device, refer to the Intel 21154 PCI-to-PCI Bridge
Datasheet, available for download at http://developer.intel.com.
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