PI7C9X110 Pericom Semiconductor Corporation, PI7C9X110 Datasheet - Page 22

• Manufacturer Part Number: PI7C9X110
• Description: Pcie-to-pci Reversible Bridge
• Manufacturer: Pericom Semiconductor Corporation

4
Table 3-2 Pin Strapping
PI7C9X110 supports forward or reverse and transparent or non-transparent combination modes of operation. For
example, when PI7C9X110 is operating in forward (REVRSB=0) and non-transparent bridge mode (TM0=1) shown
in Figure 4-1, its PCI Express interface is connected to a root complex and its PCI bus interface is connected to PCI
devices. Another example, PI7C9X110 can be configured as a reverse (REVRSB=1) and transparent (TM0=0)
bridge shown in Figure 4-2.
The non-transparent bridge feature of PI7C9X110 allows the I/O Processor to be isolated from the Host Processor
and its memory map which avoiding memory address conflict when both host and I/O processors are needed side-
by-side.
PCI based systems and peripherals are ubiquitous in the I/O interconnect technology market today. It will be a
tremendous effort to convert existing PCI based products to be used in PCI Express systems. PI7C9X110 provides
a solution to bridge existing PCI based products to the latest PCI Express technology.
Figure 4-1 Forward and Non-transparent Bridge Mode
Pericom Semiconductor
FORWARD AND REVERSE BRIDGING
TM2 Strapped
1
1
1
1
1
1
1
1
TM1 Strapped
Memory
Local
0
0
1
1
0
0
1
1
Memory
System
TM0 Strapped
Processor
Local
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0
1
0
1
0
1
0
1
PI7C9X110
Processor
Complex
Host
Root
MSK_IN Strapped
x1 link
1
1
1
1
0
0
0
0
Channel
Fibre
Test Functions
PLL test
Shorten initialization test with hot-
plug enabled
Functional loopback test
Bridge test (PRBS, IDDQ, etc.)
Reserved
Shorten initialization test with hot-
plug disabled
Reserved
Reserved
May 2008, Revision 2.6
Ethernet
PCIe-to-PCI Reversible Bridge
Fast
SCSI
PI7C9X110