參數(shù)資料
型號(hào): MPC972
廠商: Motorola, Inc.
英文描述: Low Voltage PLL Clock Driver(低壓PLL時(shí)鐘驅(qū)動(dòng)器)
中文描述: 低電壓PLL時(shí)鐘驅(qū)動(dòng)器(低壓鎖相環(huán)時(shí)鐘驅(qū)動(dòng)器)
文件頁(yè)數(shù): 8/16頁(yè)
文件大?。?/td> 171K
代理商: MPC972
MPC972
MOTOROLA
TIMING SOLUTIONS
8
‘0’
‘1’
‘1’
‘0’
‘1’
‘0’
‘1’
‘0’
MPC972
Figure 6. 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 7. 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 8. 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 9. Phase Delay Using Multiple MPC972’s
‘0’
‘0’
‘0’
‘1’
‘0’
‘0’
‘0’
‘0’
‘1’
MPC972
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
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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