PC7447AMGH1000LB datasheet(18/44 Pages) ATMEL

부품명	PC7447AMGH1000LB

상세설명	PowerPC RISC microprocessor

PDF	44 Pages

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제조업체	ATMEL [ATMEL Corporation]

홈페이지	http://www.atmel.com

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18 / 44 page

5387B–HIREL–07/05

PC7447A [Preliminary]

6.4.4.5

Bus-to-Core Multiplier Constraints with DFS

DFS is not available for all bus-to-core multipliers as configured by PLL_CFG[0:4] during hard

reset. Specifically, because the PC7447A does not support quarter clock ratios or the 1x multi-

plier, the DFS feature is limited to integer PLL multipliers of 4x and higher. The complete listing

is shown in Table 6-5 on page 18.

Table 6-5.

Valid Divide Ratio Configurations

Bus-to-Core Multiplier Configured by

PLL_CFG[0:4] (see Table 13-1 on page 35)

Bus-to-Core Multiplier with

HID1[DFS1] = 1 (÷2)

N/A

2.5x

5.5x

6.5x

N/A

3.5x

7.5x

N/A

8.5x

N/A

4.5x

9.5x

N/A

10x

10.5x

N/A

11x

5.5x

11.5x

N/A

12x

12.5x

N/A

13x

6.5x

13.5x

N/A

14x

15x

7.5x

16x

17x

8.5x

18x

20x

10x

21x

10.5x

24x

12x

28x

14x

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