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參數(shù)資料
| 型號(hào)： | LMX2377UTM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | Enclosed Switches Series LS: Side Rotary with 1.5" to 3.5" Adjustable Length Lever; Nylon Roller; 1NC 1NO SPDT Snap Action, Double Break; 0.5 in - 14NPT conduit; Plug-in |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 36/44頁 |
| 文件大?。?/td> | 3181K |
| 代理商： | LMX2377UTM |
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2.0 Programming Description
(Continued)
2.4 AUXILIARY R REGISTER
The Aux R register contains the Aux R_CNTR, PD_POL Aux, ID
o
Aux, and TRI-STATE ID
o
Aux control words, in addition to two
bits that compose the F
o
LD control word. The detailed description and programming information for each control word is
discussed in the following sections.
Reg. Most Significant Bit
21
20
SHIFT REGISTER BIT LOCATION
13
12
11
10
Least Significant Bit
3
2
19
18
17
16
15
14
9
8
7
6
5
4
1
0
Data Field
Address
Field
Aux
R
F
o
LD0 F
o
LD2
TRI-
STATE
ID
o
Aux
ID
o
Aux
PD_
POL
Aux
Aux R_CNTR[14:0]
0
0
2.4.1 Aux R_CNTR[14:0]
Aux R[2:16]
The Aux reference divider (Aux R_CNTR) can be programmed to support divide ratios from 2 to 32767. Divide ratios less than
2 are prohibited.
AUXILIARY SYNTHESIZER PROGRAMMABLE REFERENCE DIVIDER (R COUNTER)
Divide Ratio
Aux R_CNTR[14:0]
8
7
0
0
0
0
1
1
14
0
0
1
13
0
0
1
12
0
0
1
11
0
0
1
10
0
0
1
9
0
0
1
6
0
0
1
5
0
0
1
4
0
0
1
3
0
0
1
2
0
0
1
1
1
1
1
0
0
1
1
2
3
32767
2.4.2 PD_POL Aux
The PD_POL Aux bit is used to control the Aux synthesizer’s phase detector polarity based on the VCO tuning characteristics.
AUXILIARY SYNTHESIZER PHASE DETECTOR POLARITY
Aux R[17]
Control Bit
Register Location
Description
Function
0
1
PD_POL Aux
Aux R[17]
Aux Phase Detector
Polarity
Aux VCO Negative
Tuning
Characteristics
Aux VCO Positive
Tuning
Characteristics
Aux VCO Characteristics
20022609
2.4.3 ID
o
Aux
The ID
o
Aux bit controls the Aux synthesizer’s charge pump gain. Two current levels are available.
AUXILIARY SYNTHESIZER CHARGE PUMP CURRENT GAIN
Aux R[18]
Control Bit
Register Location
Description
Function
0
1
ID
o
Aux
Aux R[18]
Aux Charge Pump
Current Gain
LOW
0.95 mA
HIGH
3.80 mA
L
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LMX2377UTMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2410QM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit |
| LMX2411 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Baseband Processor for Radio Communications |
| LMX2411M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit |
| LMX2411MX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit |
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