Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LMX2430 Datasheet(PDF) 42 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LMX2430
Description  PLLatinum Dual High Frequency Synthesizer for RF Personal Communications
Download  49 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMX2430 Datasheet(HTML) 42 Page - National Semiconductor (TI)

Back Button LMX2430 Datasheet HTML 38Page - National Semiconductor (TI) LMX2430 Datasheet HTML 39Page - National Semiconductor (TI) LMX2430 Datasheet HTML 40Page - National Semiconductor (TI) LMX2430 Datasheet HTML 41Page - National Semiconductor (TI) LMX2430 Datasheet HTML 42Page - National Semiconductor (TI) LMX2430 Datasheet HTML 43Page - National Semiconductor (TI) LMX2430 Datasheet HTML 44Page - National Semiconductor (TI) LMX2430 Datasheet HTML 45Page - National Semiconductor (TI) LMX2430 Datasheet HTML 46Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 42 / 49 page
background image
2.0 Programming Description (Continued)
2.5.4 RF_PD - RF Synthesizer Powerdown (R1[23])
The RF_PD bit is used to switch the RF PLL between a powered up and powered down mode.
Furthermore, the RF_PD bit operates in conjuction with the RF_CPT bit to set a synchronous or an asynchronous powerdown
mode. Refer to Section 2.4.4 for more details on how to program the RF_CPT bit.
Control Bit
Register Location
Description
Function
01
RF_PD
R1[23]
RF Powerdown
RF PLL Active
RF PLL Powerdown
2.6 R2 REGISTER
The R2 Register contains the RF_TOC control word. The RF_TOC is used to setup the RF syhnthesizer’s Fastlock circuitry. The
RF_TOC is a 12-bit binary counter programmable from 0 to 4095.
Reg
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9876543210
DATA[20:0] FIELD
ADDRESS
[2:0]
FIELD
R2
000000000
RF_TOC[11:0]
0
1
0
2.6.1 RF_TOC[0:11] - RF Synthesizer Timeout Counter (R2[14:3])
The FLoutRF pin can be configured as a general purpose CMOS TRI-STATE output or as a Fastlock output by programming the
RF_TOC appropriately. When the RF_TOC is programmed from 0 to 3, Automatic Fastlock is disabled, and the FLoutRF pin is
either configured as a general purpose CMOS TRI-STATE output or Manual Fastlock is enabled. When the RF_TOC is
programmed to 0, the FLoutRF pin will be in TRI-STATE (high impedance) mode. The charge pump current is then the value
specified by RF_CPG (R0[19]). When the RF_TOC is programmed to 1, the FLoutRF pin is pulled to a LOW state. The charge
pump current is then set to a HIGH gain state (RF_CPG bit = 1). This condition is known as the Manual Fastlock. When the
RF_TOC is programmed to 2, the FLout_RF pin will again be pulled to a LOW state, but this time the charge pump current is the
value specified by RF_CPG (R0[19]). When the RF_TOC is programmed to 3, the FLoutRF pin is pulled to a HIGH state. Again,
the charge pump current is the value specified by RF_CPG (R0[19]). When the RF_TOC is programmed from 4 to 4095, Fastlock
is enabled and the FLoutRF pin is pulled to a LOW state. Fastlock will time-out after the specified number of PFD events. At this
time, the FLoutRF pin will switch to TRI-STATE (high impedance) mode. The value programmed into RF_TOC represents the
number of PFD events that the RF synthesizer will spend in the Fastlock state. Note that any write to the RF_TOC requires a PFD
event on the RF synthesizer to latch the contents. This means that writes to the RF_TOC take effect synchronously with the next
PFD event.
RF_TOC[11:0]
FastLock Mode
Fastlock Period
[PFD Events]
FLoutRF Pin
Functionality/ State
I
CPoutRF Magnitude
0
Disabled
N/A
General Purpose.
High Impedance State
I
CPoutRF magnitude
controlled by R0[19]
1
Enabled
Manual Fastlock
N/A
General Purpose.
Logic LOW State
I
CPoutRF =4 mA
2
Disabled
N/A
General Purpose.
Logic LOW State
I
CPoutRF magnitude
controlled by R0[19]
3
Disabled
N/A
General Purpose.
Logic HIGH State
I
CPoutRF magnitude
controlled by R0[19]
4
Enabled
Automatic Fastlock
4
FastLock.
Logic LOW State.
Switches to High
Impedance after 4 PFD
events
I
CPoutRF =4 mA
Switches to 1 mA after
4 PFD events
………
4095
Enabled
Automatic Fastlock
4095
FastLock.
Logic LOW State.
Switches to High
Impedance after 4095
PFD events
I
CPoutRF =4 mA
Switches to 1 mA after
4095 PFD events
www.national.com
42


Similar Part No. - LMX2430

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
LMX2430 TI1-LMX2430 Datasheet
4Mb / 48P
[Old version datasheet]   PLLatinum??Dual High Frequency Synthesizer for RF Personal Communications
LMX2430 TI1-LMX2430 Datasheet
3Mb / 53P
[Old version datasheet]   Dual High-Frequency Synthesizer
LMX2430SLEX TI1-LMX2430SLEX Datasheet
3Mb / 53P
[Old version datasheet]   Dual High-Frequency Synthesizer
LMX2430SLEX/NOPB TI1-LMX2430SLEX/NOPB Datasheet
3Mb / 53P
[Old version datasheet]   Dual High-Frequency Synthesizer
LMX2430TM TI1-LMX2430TM Datasheet
3Mb / 53P
[Old version datasheet]   Dual High-Frequency Synthesizer
More results

Similar Description - LMX2430

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
LMX2335 TI-LMX2335 Datasheet
437Kb / 19P
[Old version datasheet]   PLLatinum Dual Frequency Synthesizer for RF Personal Communications
LMX2430 TI1-LMX2430_14 Datasheet
4Mb / 48P
[Old version datasheet]   PLLatinum??Dual High Frequency Synthesizer for RF Personal Communications
National Semiconductor (TI)
National Semiconductor ...
LMX2330A NSC-LMX2330A Datasheet
392Kb / 17P
   PLLatinum??Dual Frequency Synthesizer for RF Personal Communications
LMX2335 NSC-LMX2335 Datasheet
393Kb / 18P
   PLLatinum??Dual Frequency Synthesizer for RF Personal Communications
LMX2346 NSC-LMX2346 Datasheet
606Kb / 27P
   PLLatinum??Frequency Synthesizer for RF Personal Communications
LMX2370 NSC-LMX2370 Datasheet
217Kb / 16P
   PLLatinum??Dual Frequency Synthesizer for RF Personal Communications
LMX2323 NSC-LMX2323 Datasheet
185Kb / 12P
   PLLatinum 2.0 GHz Frequency Synthesizer for RF Personal Communications
Texas Instruments
Texas Instruments
LMX2326TM TI1-LMX2326TM Datasheet
548Kb / 19P
[Old version datasheet]   PLLatinum Low Power Frequency Synthesizer for RF Personal Communications
National Semiconductor (TI)
National Semiconductor ...
LMX2335L NSC-LMX2335L Datasheet
542Kb / 22P
   PLLatinum??Low Power Dual Frequency Synthesizer for RF Personal Communications
LMX2330L NSC-LMX2330L Datasheet
496Kb / 21P
   PLLatinum??Low Power Dual Frequency Synthesizer for RF Personal Communications
More results


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz