mpc8555e Freescale Semiconductor, Inc, mpc8555e Datasheet - Page 68

• Manufacturer Part Number: mpc8555e
• Description: Mpc8555e Powerquicc Iii Processor With Integrated Security
• Manufacturer: Freescale Semiconductor, Inc

Clocking
15.3
Table 47
ratio is determined by the binary value of LALE and LGPL2 at power up, as shown in
15.4
Table 48
ratio in comparison to the memory bus speed.
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CCB to SYSCLK
Ratio
MPC8555E PowerQUICC™ III Integrated Communications Processor Hardware Specification, Rev. 4.2
10
12
16
2
3
4
5
6
8
9
describes the clock ratio between the e500 core complex bus (CCB) and the e500 core clock. This
shows the expected frequency values for the platform frequency when using a CCB to SYSCLK
e500 Core PLL Ratio
Frequency Options
Table 48. Frequency Options with Respect to Memory Bus Speeds
200
267
17
Binary Value of LALE, LGPL2 Signals
200
225
250
300
25
Table 47. e500 Core to CCB Ratio
200
267
300
333
00
01
10
11
33
Platform/CCB Frequency (MHz)
208
250
333
42
SYSCLK (MHz)
200
267
333
2:1 e500 core:CCB
5:2 e500 core:CCB
3:1 e500 core:CCB
7:2 e500 core:CCB
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Ratio Description
250
333
83
100
200
300
Freescale Semiconductor
Table
111
222
333
47.
133
267