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參數(shù)資料
| 型號： | MPC972FA |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 125 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP52 |
| 封裝： | LQFP-52 |
| 文件頁數(shù)： | 12/12頁 |
| 文件大小： | 337K |
| 代理商： | MPC972FA |
MPC972
MOTOROLA ADVANCED CLOCK DRIVERS DEVICE DATA
194
`0'
MPC972
Figure 6. Programming Configuration Example
fsela0
`0'
fsela1
fselb0
fselb1
Input Ref
50 MHz
fselc0
fselc1
fselFB0
fselFB1
fselFB2
VCO = 400 MHz
Ext_FB
100 MHz
Qa
40 MHz
Qb
66.66 MHz
Qc
4
50 MHz
QFB
`1'
`0'
`1'
`0'
`1'
`0'
MPC972
Figure 7. Generating Pentium Clocks from Floppy Clock
fsela0
`0'
fsela1
fselb0
fselb1
Input Ref
24 MHz
fselc0
fselc1
fselFB0
fselFB1
fselFB2
Ext_FB
60 MHz (Processor)
Qa
60 MHz (Processor)
Qb
30 MHz (PCI)
Qc
4
24 MHz (Floppy Disk Clk)
QFB
`0'
`1'
`0'
`1'
MPC972
Figure 8. Generating MPC604 Clocks from Ethernet Clocks
fsela0
`1'
fsela1
fselb0
fselb1
Input Ref
20 MHz
fselc0
fselc1
fselFB0
fselFB1
fselFB2
Ext_FB
33 MHz (PCI)
Qa
50 MHz (Processor)
Qb
50 MHz (Processor)
Qc
4
20 MHz (Ethernet)
QFB
`0'
`1'
Figure 9. Phase Delay Using Multiple MPC972’s
`0'
MPC972
fsela0
`0'
fsela1
fselb0
fselb1
Input Ref
66 MHz
fselc0
fselc1
fselFB0
fselFB1
fselFB2
Ext_FB
66 MHz
Qa
66 MHz
Qb
66 MHz
Qc
4
2
QFB
`0'
`1'
`0'
`1'
MPC972
fsela0
`0'
fsela1
fselb0
fselb1
Input Ref
fselc0
fselc1
fselFB0
fselFB1
fselFB2
Ext_FB
33 MHz Shifted 90°
Qa
33 MHz Shifted 90°
Qb
33 MHz Shifted 90°
Qc
4
66 MHz
QFB
`0'
`1'
`0'
Inv_Clk
`1'
Inv_Clk
`0'
66 MHz
Qc
2
66 MHz
33 MHz
Shifted 90°
66 MHz
2
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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