- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358887 > LMX2377UTM (NATIONAL SEMICONDUCTOR CORP) 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 PDF資料下載
參數(shù)資料
| 型號： | 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)： | 40/44頁 |
| 文件大小： | 3181K |
| 代理商： | LMX2377UTM |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁當前第40頁第41頁第42頁第43頁第44頁
2.0 Programming Description
(Continued)
2.7 MAIN N REGISTER
The Main N register contains the Main N_CNTRA, Main N_CNTRB, PRE Main, and PWDN Main control words. The Main
N_CNTRAand Main N_CNTRB control words are used to setup the programmable feedback divider. 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
Main
N
PWDN
Main
PRE
Main
Main N_CNTRB[12:0]
Main N_CNTRA[4:0]
1
1
2.7.1 Main N_CNTRA[4:0]
The Main N_CNTRAcontrol word is used to setup the Main synthesizer’sAcounter. TheAcounter is a 5-bit swallow counter used
in the programmable feedback divider. The Main N_CNTRA control word can be programmed to values ranging from 0 to 31.
MAIN SYNTHESIZER SWALLOW COUNTER (A COUNTER)
Main N[2:6]
Divide Ratio
Main N_CNTRA[4:0]
2
0
0
1
4
0
0
1
3
0
0
1
1
0
0
1
0
0
1
1
0
1
31
2.7.2 Main N_CNTRB[12:0]
Main N[7:19]
The Main N_CNTRB control word is used to setup the Main synthesizer’s B counter. The B counter is a 13-bit programmable
binary counter used in the programmable feedback divider. The Main N_CNTRB control word can be programmed to values
ranging from 3 to 8191.
MAIN SYNTHESIZER PROGRAMMABLE BINARY COUNTER (B COUNTER)
Divide
Ratio
Main N_CNTRB[12:0]
7
6
0
0
0
0
1
1
12
0
0
1
11
0
0
1
10
0
0
1
9
0
0
1
8
0
0
1
5
0
0
1
0
0
1
3
0
0
1
2
0
1
1
1
1
0
1
0
1
0
1
3
4
8191
2.7.3 PRE Main
The Main synthesizer utilizes a selectable dual modulus prescaler.
MAIN SYNTHESIZER PRESCALER SELECT
Main N[20]
Control Bit
Register Location
Description
Function
0
1
PRE Main
Main N[20]
Main Prescaler
Select
16/17 Prescaler
Selected
32/33 Prescaler
Selected
2.7.4 PWDN Main
The PWDN Main bit is used to switch the Main PLL between a powered up and powered down mode.
Furthermore, the PWDN Main bit operates in conjuction with the TRI-STATE ID
o
Main bit to set a synchronous or an
asynchronous powerdown mode.
MAIN SYNTHESIZER POWERDOWN
Main N[21]
Control Bit
Register Location
Description
Function
0
1
PWDN Main
Main N[21]
Main Powerdown
Main PLL Active
Main PLL
Powerdown
L
www.national.com
40
相關PDF資料 |
PDF描述 |
|---|---|
| LMX2377USLBX | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2377USLEX | POSITIONER |
| LMX2377U | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2471 | 3.6 GHz Delta-Sigma Fractional-N PLL with 1.7 GHz Integer-N PLL |
| LMX2502LQ1635 | PLLatinum⑩ Frequency Synthesizer System with Integrated VCO |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。