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Intel
®
IXP43X Product Line of Network Processors
April 2007 HDG
Document Number: 316844; Revision: 001US 45
Hardware Design Guidelines—Intel
®
IXP43X Product Line of Network Processors
3.11 PCI Interface
The PCI Controller of the IXP43X network processors is an industry-standard, 32-bit
interface, high-performance bus that operates at 33 MHz(PCI Local Bus Specification,
Rev. 2.2).
The PCI interface is capable of operating as a host or an option. This PCI
implementation supports 3.3 V I/O only.
As indicated in Figure 13, a PCI transparent bridge is required to support Compact PCI.
General PCI routing guidelines can be found in Section 6.2, “Topology” on page 67. For
detailed information, see the PCI Local Bus Specification, Rev. 2.2.
Figure 12. Serial Flash and SSP Port (SPI) Interface Example
SPI Flash
Intel® IXP43X Product
Line of Network
Processors
SSP Interface
SSP_TXD
SSP_SFRM
SSP_EXTCLK
SSP_SCLK
SSP_RXD
External Oscillator
D I
CS_N
CLK
DO
7.2 KHz
to 3.6864 MHz
B4109-003