MPC7457EC Ver la hoja de datos (PDF) - Freescale Semiconductor
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MPC7457EC Datasheet PDF : 71 Pages
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System Design Information
Table 18. MPC7457 Microprocessor PLL Configuration Example for 1267 MHz Parts (continued)
PLL_CFG[0:4]
01111
01110
10101
10001
10011
00000
10111
11111
01011
11100
11001
00011
11011
00001
00101
00111
01001
01101
11101
00110
Bus-to- Core-to-
Core
VCO
Multiplier Multiplier
Example Bus-to-Core Frequency in MHz (VCO Frequency in MHz)
Bus (SYSCLK) Frequency
33.3
MHz
50
MHz
66.6
MHz
75
MHz
83
MHz
100
MHz
133
MHz
167
MHz
9x
2x
9.5x
2x
10x
2x
10.5x
2x
11x
2x
11.5x
2x
12x
2x
12.5x
2x
13x
2x
13.5x
2x
14x
2x
15x
2x
16x
2x
17x
2x
18x
2x
20x
2x
21x
2x
24x
2x
28x
2x
PLL bypass
600
(1200)
667
(1334)
700
(1400)
800
(1600)
933
(1866)
600
(1200)
600
(1200)
650
(1300)
675
(1350)
700
(1400)
750
(1500)
800
(1600)
850
(1900)
900
(1800)
1000
(2000)
1050
(2100)
1200
(2400)
600
(1200)
633
(1266)
667
(1333)
700
(1400)
733
(1466)
766
(532)
800
(1600)
833
(1666)
865
(1730)
900
(1800)
933
(1866)
1000
(2000)
1066
(2132)
1132
(2264)
1200
(2400)
675
(1350)
712
(1524)
750
(1500)
938
(1876)
825
(1650)
863
(1726)
900
(1800)
938
(1876)
975
(1950)
1013
(2026)
1050
(2100)
1125
(2250)
1200
(2400)
747
(1494)
789
(1578)
830
(1660)
872
(1744)
913
(1826)
955
(1910)
996
(1992)
1038
(2076)
1079
(2158)
1121
(2242)
1162
(2324)
1245
(2490)
900
(1800)
950
(1900)
1000
(2000)
1050
(2100)
1100
(2200)
1150
(2300)
1200
(2400)
1250
(2500)
PLL off, SYSCLK clocks core circuitry directly
1197
(2394)
1264
(2528)
MPC7457 RISC Microprocessor Hardware Specifications, Rev. 8
Freescale Semiconductor
51
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