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参数资料
| 型号： | LMX2515LQ0701/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC28 |
| 封装： | 5 X 5 MM, 0.75 MM HEIGHT, LLP-28 |
| 文件页数： | 4/17页 |
| 文件大小： | 254K |
| 代理商： | LMX2515LQ0701/NOPB |
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2515LQ1321 | 制造商:Rochester Electronics LLC 功能描述:PLL+VCO PDC - Bulk 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:IC PLL VCO SMD 2515 LLP-28 |
| LMX2515LQ1321/NOPB | 功能描述:IC SYNTHESIZER FREQ PLL 28-LLP RoHS:是 类别:RF/IF 和 RFID >> RF 其它 IC 和模块 系列:PLLatinum™ 标准包装:100 系列:* |
| LMX2515LQX0701 | 制造商:NSC 制造商全称: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 制造商全称:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer System with Integrated VCO |
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