MPC8572ECLPXATLD datasheet(122/140 Pages) FREESCALE

122 / 140 page

MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4

122

Freescale Semiconductor

Thermal

19.5.2

Minimum Platform Frequency Requirements for High-Speed

Interfaces

Section 4.4.3.6 “I/O Port Selection” of the MPC8572E PowerQUICC™ III Integrated Host Processor

Family Reference Manual, describes various high-speed interface configuration options. Note that the

CCB clock frequency must be considered for proper operation of such interfaces as described below.

For proper PCI Express operation, the CCB clock frequency must be greater than or equal to:

See Section 21.1.3.2, “Link Width” of the MPC8572E PowerQUICC™ III Integrated Host Processor

Family Reference Manual, for PCI Express interface width details. Note that the “PCI Express link width”

in the above equation refers to the negotiated link width as the result of PCI Express link training, which

may or may not be the same as the link width POR selection.

For proper serial RapidIO operation, the CCB clock frequency must be greater than:

See Section 20.4, “1x/4x LP-Serial Signal Descriptions” of the MPC8572E PowerQUICC™ III Integrated

Host Processor Family Reference Manual, for serial RapidIO interface width and frequency details.

20 Thermal

This section describes the preliminary thermal specifications of the MPC8572E. This is subject to change.

Table 83 shows the thermal characteristics for the package, 1023 33x33 FC-PBGA.

The package uses a 29.6 x 29.6 mm lid that attaches to the substrate. Recommended maximum heat sink

force is 10 pounds force (45 Newton).

Table 83. Package Thermal Characteristics

Rating

Board

Symbol

Value

Unit

Notes

Junction to ambient, natural convection

Single-layer (1s)

RΘJA

°C/W

1, 2

Junction to ambient, natural convection

Four-layer (2s2p)

RΘJA

°C/W

1, 3

Junction to ambient (at 200 ft./min.)

Single-layer (1s)

RΘJMA

°C/W

1, 3

Junction to ambient (ar 200 ft./min.)

Four-layer (2s2p)

RΘJMA

°C/W

1, 3

Junction to board

—

RΘJB

°C/W

527 MHz

PCI Express link width

()

----------------------------------------------------------------------------------------------

20.80

()

serial RapidIO interface frequency

()

serial RapidIO link width

()

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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