lmx2502lq1635 National Semiconductor Corporation, lmx2502lq1635 Datasheet - Page 17

• Manufacturer Part Number: lmx2502lq1635
• Description: Pllatinum? Frequency Synthesizer System With Integrated Vco
• Manufacturer: National Semiconductor Corporation

Programming Description
R5 REGISTER
The R5 register address bits (R5 [4:0]) are “01111”.
Register R5 is used to set the IF_R divider if the default value is not desired. This register is only active if the SPI_DEF bit in
register R0 is 0.
R6 REGISTER
The R6 register address bits (R6 [5:0]) are “011111”.
Register R6 is used for internal testing of the device and is not intended for customer use. This register is only active if the
SPI_DEF bit in register R0 is 0.
R5
R6
MSB
23
0
MSB
23
1
22
0
22
0
21
1
21
0
Name
IF_R [8:0]
20
1
20
0
19
0
19
0
18
0
18
0
17
0
17
0
(Continued)
16
0
16
0
Data Field
SHIFT REGISTER BIT LOCATION
SHIFT REGISTER BIT LOCATION
Data Field
15
1
15
0
R5 REGISTER
R6 REGISTER
14
0
14
0
17
13
13
0
12
12
0
11
11
0
Functions
IF R Counter
9-bit programmable counter
2 ≤ IF_R ≤ 511
10
10
0
IF_R
[8:0]
9
9
0
8
8
0
7
7
0
6
6
0
5
5
0
4
0
4
1
Address Field
3
1
3
1
Address
Field
2
1
2
1
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1
1
1
1
LSB
0
1
LSB
0
1