lmx2505lq1321 National Semiconductor Corporation, lmx2505lq1321 Datasheet - Page 15

• Manufacturer Part Number: lmx2505lq1321
• Description: Pllatinu Dual Frequency Synthesizer System With Integrated Vcos
• Manufacturer: National Semiconductor Corporation

Programming Description
R2 REGISTER
The R2 register address bits (R2 [1:0]) are “10”.
R3 REGISTER
The R3 register address bits (R3 [2:0]) are “011”. This register is only written to if the SPI_DEF bit is set to 0.
R4 REGISTER
The R4 register address bits (R4 [3:0]) are “0111”. This register is only written to if the SPI_DEF bit is set to 0.
R5 REGISTER
The R5 register address bits (R5 [4:0]) are “01111”. This register is only written to if the SPI_DEF bit is set to 0.
R2
(Default)
R3
R4
R5
MSB
23
1
MSB
23
0
MSB
23
0
MSB
23
1
22
0
22
0
22
0
22
1
21
0
21
0
21
0
21
0
20
0
20
0
20
0
20
0
19
0
19
0
19
0
19
1
18
0
18
1
18
0
18
0
17
0
17
1
17
1
17
0
(Continued)
16
0
16
1
16
0
SHIFT REGISTER BIT LOCATION
SHIFT REGISTER BIT LOCATION
SHIFT REGISTER BIT LOCATION
Data Field
16
0
Data Field
SHIFT REGISTER BIT LOCATION
15
0
15
1
15
1
Data Field
15
0
R2 REGISTER
R3 REGISTER
R4 REGISTER
R5 REGISTER
Data Field
14
0
14
0
14
0
14
1
13
0
15
13
0
13
1
13
1
12
0
12
0
12
0
12
1
11
0
11
0
11
0
11
1
10
0
10
0
10
0
10
0
9
0
9
0
9
1
9
0
8
0
8
0
8
1
8
0
7
0
7
0
7
0
7
0
6
0
6
0
6
0
6
0
5
0
5
0
5
0
5
1
4
0
4
Address Field
0
4
1
4
0
3
0
3
1
3
1
3
Address
Field
0
2
1
2
1
2
Address
Field
0
2
1
Address
Field
1
1
www.national.com
1
1
1
1
1
1
LSB
LSB
LSB
LSB
0
0
0
1
0
1
0
1