MPC8544E datasheet(95/117 Pages) FREESCALE

部件名	MPC8544E

功能描述	MPC8544E PowerQUICC III Integrated Processor Hardware Specifications

PDF	117 Pages

Scroll/Zoom	100%

制造商	FREESCALE [Freescale Semiconductor, Inc]

网页	http://www.freescale.com

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MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5

Freescale Semiconductor

Clocking

19.5

Security Controller PLL Ratio

Table 67 shows the SEC frequency ratio.

19.6

Frequency Options

19.6.1

SYSCLK to Platform Frequency Options

Table 68 shows the expected frequency values for the platform frequency when using a CCB clock to

SYSCLK ratio in comparison to the memory bus clock speed.

Table 67. SEC Frequency Ratio

Signal Name

Value (Binary)

CCB CLK:SEC CLK

LWE_B

2:11

13:12

Notes:

1. In 2:1 mode the CCB frequency must be operating

≤ 400 MHz.

2. In 3:1 mode any valid CCB can be used. The 3:1 mode is the default ratio for security block.

Table 68. Frequency Options of SYSCLK with Respect to Memory Bus Speeds

CCB to SYSCLK Ratio

SYSCLK (MHz)

33.33

41.66

66.66

100

111

133.33

Platform /CCB Frequency (MHz)

—

333

400

—

333

400

445

533

333

415

500

400

500

333

533

375

333

417

400

500

533

MPC8544E 数据表(PDF) 95 Page - Freescale Semiconductor, Inc

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