LMX2430EVAL National Semiconductor, LMX2430EVAL Datasheet - Page 43
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LMX2430EVAL
Manufacturer Part Number
LMX2430EVAL
Description
EVALUATION BOARD FOR LMX2430
Manufacturer
National Semiconductor
Series
PLLatinum™r
Datasheets
1.LMX2433SLEXNOPB.pdf
(49 pages)
2.LMX2430EVAL.pdf
(26 pages)
3.LMX2430EVAL.pdf
(8 pages)
Specifications of LMX2430EVAL
Main Purpose
Timing, Frequency Synthesizer
Utilized Ic / Part
LMX2430
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / Rohs Status
Not Compliant
Other names
*LMX2430EVAL
Reg
R3
2.0 Programming Description
2.7 R3 REGISTER
The R3 register contains the IF_R, IF_CPP, IF_CPG, IF_CPT, and IF_RST control words, in addition to two of the four bits that
compose the MUX control word. The detailed descriptions and programming information for each control word is discussed in the
following sections.
2.7.1 IF_R[14:0] - IF Synthesizer Programmable Reference Divider (R Counter) (R3[17:3])
The IF reference divider (IF_R) can be programmed to support divide ratios from 3 to 32767. Divide ratios less than 3 are
prohibited.
2.7.2 IF_CPP - IF Synthesizer Phase Detector Polarity (R3[18])
The IF_CPP bit is used to control the IF synthesizer’s phase/ frequency detector polarity based on the VCO tuning characteristics.
MUX[1:0]
23
Divide Ratio
32767
22
3
4
•
Control Bit
IF_CPP
RST
IF_
21
CPT
IF_
20
CPG
IF_
19
14
0
0
1
•
CPP
IF_
18
Register Location
13
0
0
1
•
17
R3[18]
12
0
0
1
•
16
11
15
0
0
1
•
DATA[20:0] FIELD
IF VCO Characteristics
14
(Continued)
IF Phase/ Frequency
Detector Polarity
10
0
0
1
•
13
Description
9
0
0
1
•
12
43
8
0
0
1
11
•
IF_R[14:0]
IF_R[14:0]
10
7
0
0
1
•
IF VCO Negative
Tuning
Characteristics
9
20053568
6
0
0
1
•
8
0
5
0
0
1
•
7
Function
6
4
0
0
1
•
IF VCO Positive
Tuning
Characteristics
5
3
0
0
1
•
4
1
2
0
1
1
•
3
www.national.com
2
0
1
1
0
1
•
ADDRESS
FIELD
[2:0]
1
1
0
1
0
1
•
0
1