參數(shù)資料
型號(hào)： LMX2531
廠商： National Semiconductor Corporation
英文描述： PLLatinum High Performance Frequency Synthesizer System with Integrated VCO
中文描述： PLLatinum高性能頻率合成器系統(tǒng)的集成VCO
文件頁(yè)數(shù)： 19/25頁(yè)
文件大?。?/td> 589K
代理商： LMX2531
2.0 General Programming Information
(Continued)
2.5 REGISTER R4
2.5.1 TOC[13:0] -- Time Out Counter for FastLock
When the value of this word is 3 or less, then FastLock is disabled, and this pin can only be used for general purpose I/O. When
this value is 4 or greater, the time out counter is engaged for the amount of phase detector cycles shown in the table below.
TOC Value
0
1
2
3
4
.
16383
FLout Pin State
High Impedance
Low
Low
High
Low
.
Low
Timeout Count
0
Always Enabled
0
0
4 X 2 Phase Detector
.
16383 X 2 Phase Detector
When this count is active, the FLout Pin is grounded, the FastLock current is engaged, and the resistors R3 and R4 are also
potentially changed. The table below summarizes the bits that control various values in and out of FastLock differences.
FastLock State
Steady State
Fastlock
FLoutRF
High Impedance
Grounded
Charge Pump Current
ICP
ICPFL
R3
R4
R3_ADJ
R3_ADJ_FL
R4_ADJ
R4_ADJ_FL
2.5.2 ICPFL[3:0] -- Charge Pump Current for Fastlock
When FastLock is enabled, this is the charge pump current that is used for faster lock time.
ICPFL
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Fastlock Charge Pump State
1X
2X
3X
4X
5X
6X
7X
8X
9X
10X
11X
12X
13X
14X
15X
16X
Typical Fastlock Charge Pump Current at 3 Volts (μA)
95
190
285
380
475
570
665
760
855
950
1045
1140
1235
1330
1425
1520
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2531_07 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO
LMX25311146EVAL 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 LMX2531LQ1146 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
LMX25311146EVAL/NOPB 功能描述:射頻開發(fā)工具 LMX25311146 EVAL MOD RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評(píng)估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V
LMX25311226EVAL 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 LMX2531LQ1226 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
LMX25311226EVAL/NOPB 功能描述:射頻開發(fā)工具 LMX25311226 EVAL MOD RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評(píng)估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V
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