IXP45X datasheet(75/148 Pages) INTEL

75 / 148 page

Package Information

August 2006

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

Document Number: 306261-004US

PLL_LOCK

Signal used to inform external reset logic that the internal PLL has achieved a locked state.

PLL_LOCK will also be de-asserted during a watchdog timeout.

RCOMP_REF

Tied off

to a

resistor

Tied off

to a

resistor

Tied off to

a resistor

Tied off to

a resistor

Signal used to control PCI and SMII drive strength characteristics. Drive strength is varied on

PCI and SMII signals depending upon temperature.

Pin requires a 34-Ω +/- 1% tolerance resistor to ground. (Refer to Figure 14 on page 107.)

SPARE1

n/a

No Connection is to be made to this signal

SPARE2

n/a

No Connection is to be made to this signal

Table 25.

Power Interface (Sheet 1 of 2)

Name

Power

Reset†

Normal

After

Reset

Until

Software

Enables

Possible

Configur

ations

After

Software

Enables

Type†

Description

VCC

N/A

1.3-V power supply input pins used for the internal logic. If operating at 667 MHz, this supply voltage

needs to be increased to VCC = 1.5 V.

VCCP

N/A

3.3-V power supply input pins used for the peripheral (I/O) logic.

VCCM

N/A

2.5-V power supply input pins used for the DDR memory interface

VSS

N/A

Ground power supply input pins used for both the 3.3-V, 2.5-V, and the 1.3-V power supplies.

OSC_VCCP

N/A

3.3-V power supply input pins used for the peripheral (I/O) logic of the analog oscillator circuitry.

Require special power filtering circuitry. Refer to Figure 12 on page 106.

OSC_VSSP

N/A

Ground input pins used for the peripheral (I/O) logic of the analog oscillator circuitry. Used in

conjunction with the OSC_VCCP pins.

Requires special power filtering circuitry. Refer to Figure 12 on page 106.

OSC_VCC

N/A

1.3-V power supply input pins used for the internal logic of the analog oscillator circuitry. Requires

special power filtering circuitry. If operating at 667 MHz, this supply voltage needs to be increased to

VCC = 1.5 V. Refer to Figure 13 on page 106.

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.

Table 24.

System Interface (Sheet 2 of 2)

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.

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