參數(shù)資料
型號(hào)： LMX2485
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： XO, clock
英文描述： 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
中文描述： PLL FREQUENCY SYNTHESIZER, 3000 MHz, PQCC24
封裝： 4 X 4 MM, 0.8 MM, PLASTIC, LLP-24
文件頁(yè)數(shù)： 27/37頁(yè)
文件大?。?/td> 861K
代理商： LMX2485
Programming Description
(Continued)
2.2 R1 REGISTER
REGISTER
23
22
21
20
19
18
17
16
DATA[19:0]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
C3
0
C2
0
C1
1
C0
1
R1
RF_PD
RF_P
RF_R[5:0]
RF_FD[11:0]
2.2.1 RF_FD[11:0] -- RF PLL Fractional Denominator
The function of these bits are described in section 2.6.2.
2.2.2 RF_R [5:0] -- RF R Divider Value
The RF R Counter value is determined by this control word. Note that this counter does allow values down to one.
R Value
1
...
63
RF_R[5:0]
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
1
.
1
2.2.3 RF_P -- RF Prescaler bit
The prescaler used is determined by this bit.
RF_P
0
1
Prescaler
8/9/12/13
16/17/20/21
Maximum Frequency
2000 MHz
3000 MHz
2.2.4 RF_PD -- RF Power Down Control Bit
When this bit is set to 0, the RF PLL operates normally. When it is set to one, the RF PLL is powered down and the RF Charge
pump is set to a TRI-STATE mode. The CE pin and ATPU bit also control power down functions, and will override the RF_PD bit.
The order of precedence is as follows. First, if the CE pin is LOW, then the PLL will be powered down. Provided this is not the
case, the PLL will be powered up if the ATPU bit says to do so, regardless of the state of the RF_PD bit. After the CE pin and the
ATPU bit are considered, then the RF_PD bit then takes control of the power down function for the RF PLL.
L
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相關(guān)PDF資料
PDF描述
LMX2485E 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
LMX2485ESQ 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
LMX2485ESQX 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
LMX2485SQ 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
LMX2485SQX 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2485_0610 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
LMX2485_08 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800MHz Integer PLL
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LMX2485E 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum? Frequency Synthesizers with 800 MHz Integer PLL
LMX2485E EVAL 功能描述:BOARD EVALUATION LMX2485E RoHS:否 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
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