mpc8641 Freescale Semiconductor, Inc, mpc8641 Datasheet - Page 107

• Manufacturer Part Number: mpc8641
• Description: Integrated Host Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Note that there is no default for this PLL ratio; these signals must be pulled to the desired values. Also note
that the DDR data rate is the determining factor in selecting the MPX bus frequency, since the MPX
frequency must equal the DDR data rate.
18.3
Table 69
by the binary value of LDP[0:3], LA[27](cfg_core_pll[0:4] - reset config name) at power up, as shown in
Table
18.4
Freescale Semiconductor
•
69.
Binary value on LA[28:31] at power up
describes the clock ratio between the platform and the e600 core clock. This ratio is determined
e600 to MPX clock PLL Ratio
Frequency Options
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
Binary Value of LDP[0:3], LA[27] Signals e600 core: MPX Clock Ratio
Binary Value of LA[28:31] Signals
Table 69. e600 Core to MPX Clock Ratio
01000
01100
10000
11100
10100
01110
Table 68. MPX:SYSCLK Ratio
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
MPX:SYSCLK Ratio
Reserved
Reserved
Reserved
2:1
3:1
4:1
5:1
6:1
8:1
9:1
2.5:1
3.5:1
4.5:1
2:1
3:1
4:1
Clocking
107