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參數(shù)資料
| 型號(hào)： | LMX2515LQ1321/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC28 |
| 封裝： | 5 X 5 MM, 0.75 MM HEIGHT, LLP-28 |
| 文件頁(yè)數(shù)： | 4/17頁(yè) |
| 文件大?。?/td> | 254K |
| 代理商： | LMX2515LQ1321/NOPB |
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Programming Description
GENERAL PROGRAMMING INFORMATION
The serial interface has a 24-bit shift register to store the incoming data bits temporarily. The incoming data is first loaded into the
shift register from MSB to LSB. The data is shifted at the rising edge of the clock signal. When the latch enable signal transitions
from LOW to HIGH, the data stored in shift register is transferred to the proper register depending on the address bit setting. The
selection of the particular register is determined by the control bits indicated in boldface text.
At initial start-up, the MICROWIRE loading requires three default words (registers R2, loaded first, to R0, loaded last). After the
device has been initially programmed, the RF VCO frequency can be changed using a single register (R0).
The control register content map describes how the bits within each control register are allocated to the specific control functions.
COMPLETE REGISTER MAP
Register
MSB
SHIFT REGISTER BIT LOCATION
LSB
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9876
5
4
3
2
1
0
R0
(Default)
RX/
TX
RF_
PD
HS
0
RF_
SEL
RF_B
[3:0]
RF_A
[2:0]
RF_FN
[9:0]
00
R1
(Default)
SPI_
DEF
0
10
01010000
0
010LDOB_
CRL
[1:0]
OSC_
FREQ
[1:0]
01
R2
(Default)
1
0
1
00001111
0
0000
0
1
10
R3
1
0
11010000
0
0000
0
1
01
1
R4
0
01110100
0
1100
1
0
011
1
R5
0
00000000
0
0000
0
0
111
1
Note: R0 control register will be used when hot start frequency change.
Note: Boldface text represent address bits.
LMX2515
www.national.com
12
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LMX2515LQX0701 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer System with Integrated VCO |
| LMX2515LQX0701/NOPB | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Single 28-Pin LLP EP T/R |
| LMX2515LQX1321 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer System with Integrated VCO |
| LMX2522 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:PLLatinum Frequency Synthesizer System with Integrated VCOs |
| LMX25221635EVAL | 制造商:OC White Company 功能描述:Evaluation Board For LMX2522 PLLatinum Frequency Synthesizer System |
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