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參數(shù)資料
| 型號(hào)： | LMX2525 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| 中文描述： | PLLatinum雙頻率合成系統(tǒng)的集成和VCO |
| 文件頁數(shù)： | 12/17頁 |
| 文件大?。?/td> | 237K |
| 代理商： | LMX2525 |
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
R
MSB
SHIFT REGISTER BIT LOCATION
LSB
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R0
(Default)
R1
(Default)
RX/
TX
SPI_
DEF
RF_
PD
0
HS
0
BS
RF_B
[3:0]
1
RF_A
[2:0]
0
RF_FN
[9:0]
0
LD
0
0
0
1
0
0
0
1
0
0
0
0
0
1
OB_
CRL
[1:0]
0
OSC_
FREQ
[1:0]
0
0
1
R2
(Default)
R3
R4
R5
1
1
0
0
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
1
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
0
0
1
0
1
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
1
0
1
0
0
1
0
1
0
1
1
1
1
1
1
1
1
Note:
R0 control register will be used when hot start frequency change.
Note: Boldface
text represent address bits.
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2525LQ1321 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC PLL + VCO SMD 2525 LLP-24 |
| LMX2525LQ1321/NOPB | 功能描述:IC FREQ SYNTH DUAL W/VC0 24-LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:100 系列:* |
| LMX2525LQX1321 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| LMX2525LQX1321/NOPB | 功能描述:IC FREQ SYNTH DUAL VCO 24-LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:100 系列:* |
| LMX2531 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
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