參數(shù)資料
型號(hào): MPC973
廠商: Motorola, Inc.
英文描述: LOW VOLTAGE PLL CLOCK DRIVER
中文描述: 低壓PLL時(shí)鐘驅(qū)動(dòng)器
文件頁(yè)數(shù): 9/14頁(yè)
文件大小: 182K
代理商: MPC973
MPC972 MPC973
TIMING SOLUTIONS
BR1333 — Rev 6
9
MOTOROLA
‘0’
‘1’
‘1’
‘0’
‘1’
‘0’
‘1’
‘0’
MPC972
Figure 8. Programming Configuration Example
fsela0
fsela1
fselb0
fselb1
fselc0
fselc1
fselFB0
fselFB1
fselFB2
‘0’
Input Ref
50MHz
VCO = 400MHz
Ext_FB
100MHz
Qa
40MHz
Qb
66.66MHz
Qc
4
4
4
50MHz
QFB
‘0’
‘0’
‘0’
‘1’
‘1’
‘1’
‘1’
‘0’
MPC972
Figure 9. Generating Pentium Clocks from Floppy Clock
fsela0
fsela1
fselb0
fselb1
fselc0
fselc1
fselFB0
fselFB1
fselFB2
‘0’
Input Ref
24MHz
Ext_FB
60MHz (Processor)
Qa
60MHz (Processor)
Qb
30MHz (PCI)
Qc
4
4
4
24MHz (Floppy Disk Clk)
QFB
‘1’
‘0’
‘1’
‘1’
‘1’
‘1’
‘1’
‘1’
MPC972
Figure 10. Generating MPC604 Clocks from Ethernet Clocks
fsela0
fsela1
fselb0
fselb1
fselc0
fselc1
fselFB0
fselFB1
fselFB2
‘1’
Input Ref
20MHz
Ext_FB
33MHz (PCI)
Qa
50MHz (Processor)
Qb
50MHz (Processor)
Qc
4
4
4
20MHz (Ethernet)
QFB
Figure 11. Phase Delay Using Multiple MPC972/973’s
‘0’
‘0’
‘0’
‘0’
‘1’
‘0’
‘1’
‘0’
‘1’
MPC972/973
fsela0
fsela1
fselb0
fselb1
fselc0
fselc1
fselFB0
fselFB1
fselFB2
Inv_Clk
‘0’
Input Ref
66MHz
Ext_FB
66MHz
Qa
66MHz
Qb
66MHz
Qc
4
4
2
QFB
‘1’
‘0’
‘1’
‘1’
‘1’
‘0’
‘0’
‘0’
‘0’
MPC972/973
fsela0
fsela1
fselb0
fselb1
fselc0
fselc1
fselFB0
fselFB1
fselFB2
Inv_Clk
‘0’
Input Ref
Ext_FB
33MHz Shifted 90
°
Qa
33MHz Shifted 90
°
Qb
33MHz Shifted 90
°
Qc
4
4
4
66MHz
QFB
66MHz
Qc
2
66MHz
33MHz
Shifted 90
°
66MHz
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