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MPC7448 RISC Microprocessor Hardware Specifications, Rev. 4
54 Freescale Semiconductor
System Design Information
Table 16. Valid Divide Ratio Configurations
DFS mode disabled
DFS divide-by-2 mode enabled
(HID1[DFS2] = 1 or DFS2
=0)
DFS divide-by-4 mode enabled
(HID1[DFS4] = 1 or DFS4 =0)
Bus-to-Core Multiplier
Configured by
PLL_CFG[0:5]
(see Table 12)
HID1[PC0-5]
3
Bus-to-Core
Multiplier
HID1[PC0-5]
3
Bus-to-Core
Multiplier HID1[PC0-5]
3
2x
4
010000 N/A (unchanged)
1
unchanged
1
N/A (unchanged)
1
unchanged
1
3x
4
100000 N/A (unchanged)
1
unchanged
1
N/A (unchanged)
1
unchanged
1
4x
4
101000 2x
4
010000 N/A (unchanged)
1
unchanged
1
5x 101100 2.5x
4
010101 N/A (unchanged)
1
unchanged
1
5.5x 100100 2.75x
4
110101
2
N/A (unchanged)
1
unchanged
1
6x 110100 3x
4
100000 N/A (unchanged)
1
unchanged
1
6.5x 010100 3.25x
4
100000
2
N/A (unchanged)
1
unchanged
1
7x 001000 3.5x
4
110101 N/A (unchanged)
1
unchanged
1
7.5x 000100 3.75x
4
110101
2
N/A (unchanged)
1
unchanged
1
8x 110000 4x
4
101000
4
2x
4
010000
8.5x 011000 4.25x
4
101000
2
N/A (unchanged)
1
unchanged
1
9x 011110 4.5x
4
011101 2.25x
4
010000
2
9.5x 011100 4.75x
4
011101
2
N/A (unchanged)
1
unchanged
1
10x 101010 5x 101100 2.5x
4
010101
10.5x 100010 5.25x 101100
2
N/A (unchanged)
1
unchanged
1
11x 100110 5.5x 100100 2.75x
4
010101
2
11.5x 000000 5.75x 100100
2
N/A (unchanged)
1
unchanged
1
12x 101110 6x 110100 3x
4
100000
12.5x 111110 6.25x 110100
2
N/A (unchanged)
1
unchanged
1
13x 010110 6.5x 010100 3.25x
4
100000
2
13.5x 111000 6.75 010100
2
N/A (unchanged)
1
unchanged
1
14x 110010 7x 001000 3.5x
4
110101
15x 000110 7.5x 000100 3.75x
4
110101
2
16x 110110 8x 110000 4x
4
101000
17x 000010 8.5x 011000 4.25x
4
101000
2
18x 001010 9x 011110 4.5x
4
011101
20x 001110 10x 101010 5x 101100
21x 010010 10.5x 100010 5.25x 101100
2
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