參數(shù)資料
型號(hào)： MPC930FA
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類(lèi)： 時(shí)鐘產(chǎn)生/分配
英文描述： 140 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP32
封裝： TQFP-32
文件頁(yè)數(shù)： 11/14頁(yè)
文件大小： 544K
代理商： MPC930FA
MPC930 MPC931
MOTOROLA
ECLinPS and ECLinPS Lite
DL140 — Rev 3
6
APPLICATIONS INFORMATION
Programming the MPC930/931
The MPC930/931 clock driver outputs can be configured
into several frequency relationships, in addition the external
feedback option allows for a great deal of flexibility in
establishing unique input to output frequency relationships.
The output dividers for the three output groups allows the
user to configure the outputs into 1:1, 2:1, 3:1, 3:2 and 3:2:1
frequency ratios. The use of even dividers ensures that the
output duty cycle is always 50%. Table 1 illustrates the
various output configurations, the table describes the outputs
using the VCO frequency as a reference. As an example for a
3:2:1 relationship the Qa outputs would be set at VCO/2, the
Qb’s at VCO/4 and the Qc’s at VCO/6. These settings will
provide output frequencies with a 3:2:1 relationship.
The division settings establish the output relationship, but
one must still ensure that the VCO will be stable given the
frequency of the outputs desired. The VCO lock range can be
found in the specification tables. The feedback frequency
and the Power_Dn pin can be used to situate the VCO into a
frequency range in which the PLL will be stable. The design
of the PLL is such that for output frequencies between 25 and
180MHz the MPC930/931 can generally be configured into a
stable region.
The relationship between the input reference and the
output frequency is also very flexible. Table 2 shows the
multiplication factors between the inputs and outputs when
the internal feedback option is used. For external feedback
Table 1 can be used to determine the multiplication factor,
there are too many potential combinations to tabularize the
external feedback condition. Figure 5 through Figure 10
illustrates several programming possibilities, although not
exhaustive it is representative of the potential applications.
Table 1. Programmable Output Frequency Relationships
(Power_Dn = ‘0’)
INPUTS
OUTPUTS
Div_Sela
Div_Selb
Div_Selc
Qa
Qb
Qc
0
VCO/2
VCO/4
0
1
VCO/2
VCO/6
0
1
0
VCO/2
VCO/4
0
1
VCO/2
VCO/4
VCO/6
1
0
VCO/4
VCO/2
VCO/4
1
0
1
VCO/4
VCO/2
VCO/6
1
0
VCO/4
1
VCO/4
VCO/6
Table 2. Input Reference/Output Frequency Relationships (Internal Feedback Only)
INPUTS
OUTPUTS
Qa
Qb
Qc
Div_Sela
Div_Selb
Div_Selc
Power_Dn=0
Power_Dn=1
Power_Dn=0
Power_Dn=1
Power_Dn=0
Power_Dn=1
0
4x
2x
4x
2x
x
0
1
4x
2x
4x
2x
4/3x
2/3x
0
1
0
4x
2x
x
2x
x
0
1
4x
2x
x
4/3x
2/3x
1
0
2x
x
4x
2x
x
1
0
1
2x
x
4x
2x
4/3x
2/3x
1
0
2x
x
2x
x
2x
x
1
2x
x
2x
x
4/3x
2/3x
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MPC930 MPC931
Low Voltage PLL Clock Driver
NETCOM
IDT Low Voltage PLL Clock Driver
Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc
MPC930 MPC931
6
相關(guān)PDF資料
PDF描述
MPC930FA 140 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP32
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MPC9850VF 500 MHz, PROC SPECIFIC CLOCK GENERATOR, PBGA100
MPC9850VMR2 500 MHz, PROC SPECIFIC CLOCK GENERATOR, PBGA100
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC931 制造商:Motorola Inc 功能描述:
MPC9315 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:2.5V and 3.3V CMOS PLL Clock Generator and Driver
MPC9315AC 功能描述:鎖相環(huán) - PLL 2.5 3.3V 160MHz Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
MPC9315ACR2 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 FSL 1-8 LVCMOS PLL Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
MPC9315FA 功能描述:鎖相環(huán) - PLL 2.5 3.3V 160MHz Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
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