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UPA to PCI Interface
U2P
STP2223BGA
July 1997
Block Diagram
Figure 3. shows a conceptual block diagram of U2P. The actual implementation is somewhat different - for
example, there are no internal bidirectional busses. Block diagrams with the actual implementation details
can be found in the U2P Users Manual.
Figure 3. U2P Internal Block Diagram
PCI Bus
Mondo
PIO Ctl.
UPA
Dispatch
Unit
BUS Ctl.
Timer/
Counters
ECC
Gen/
Check
DMA Ctl.
PCI Bus B
Interrupts
JTAG
UPA
PCI Bus
Streaming
Cache B
PCI Bus A
IOMMU
Streaming
Cache A
Merge
Buffer
JTAG
Module A
Module B
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