IXP45X datasheet(65/148 Pages) INTEL

65 / 148 page

Package Information

August 2006

Intel® IXP45X and Intel® IXP46X Product Line of Network Processors Datasheet

Document Number: 306261-004US

ETHC_COL

MII Mode of Operation:

Asserted by the PHY when a collision is detected by the PHY. This MAC contains hardware hashing

capabilities local to the interface.

• When NPE C is configured in MII mode of operation and the signal is not being used, it

should be pulled low through a 10-KΩ resistor.

SMII Mode of Operation:

Not used.

• When NPE C is configured in SMII mode of operation, this signal must be pulled high through

a 10-KΩ resistor.

When this interface is disabled via the NPE-C Ethernet soft fuse (refer to the Expansion Bus

Controller chapter of the Intel® IXP45X and Intel® IXP46X Product Line of Network Processors

Developer’s Manual) and is not being used a system design, this interface/signal is not required

for any connection.

ETHC_CRS

Asserted by the PHY when the transmit medium or receive medium are active. De-asserted when

both the transmit and receive medium are idle. Remains asserted throughout the duration of

collision condition. PHY asserts CRS asynchronously and de-asserts synchronously with respect

to ETHC_RXCLK.

This MAC contains hardware hashing capabilities local to the interface.

Should be pulled high through a 10-KΩ resistor when not being utilized in the system or when in

SMII mode of operation.

Table 15.

MII/SMII Interfaces (Sheet 7 of 7)

Name

Power

Reset†

Normal

After

Reset

Until

Software

Enables

Possible

Configur

ations

After

Software

Enables

Type†

Description

Note:

This table discusses all features supported on the Intel® IXP45X and Intel® IXP46X Product Line of Network Processors. For details on feature support listed by processor,

see Table 1 on page 13.

†

For a legend of the Type codes, see Table 8 on page 43.

††

Please refer to Intel® IXP45X and Intel® IXP46X Product Line of Network Processors Developer’s Manual for information on how to select the interface desired

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