mpc8544e Freescale Semiconductor, Inc, mpc8544e Datasheet - Page 95

• Manufacturer Part Number: mpc8544e
• Description: Mpc8544e Powerquicc Iii Integrated Processor
• Manufacturer: Freescale Semiconductor, Inc

19.5
Table 67
19.6
19.6.1
Table 68
SYSCLK ratio in comparison to the memory bus clock speed.
Freescale Semiconductor
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.
CCB to SYSCLK Ratio
shows the SEC frequency ratio.
shows the expected frequency values for the platform frequency when using a CCB clock to
Security Controller PLL Ratio
Frequency Options
10
12
16
2
3
4
5
6
8
9
Signal Name
SYSCLK to Platform Frequency Options
LWE_B
Table 68. Frequency Options of SYSCLK with Respect to Memory Bus Speeds
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
33.33
333
400
533
Preliminary—Subject to Change Without Notice
Table 67. SEC Frequency Ratio
41.66
333
375
417
500
Freescale Confidential Proprietary
Value (Binary)
66.66
Platform /CCB Frequency (MHz)
0
1
333
400
533
—
SYSCLK (MHz)
333
415
500
83
100
400
500
—
CCB CLK:SEC CLK
2:1
3:1
111
333
445
1
2
133.33
400
533
Clocking
—
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