LUCW3000CCN AGERE [Agere Systems], LUCW3000CCN Datasheet - Page 11

• Manufacturer Part Number: LUCW3000CCN
• Description: W3000 PLL Dual-Band Frequency Synthesizer
• Manufacturer: AGERE [Agere Systems]

Advance Data Sheet
December 1999
REF Register
This section describes each bit of the reference register. The REF register is used for programming the division
ratio of the reference clock and for initial setup of the operation modes.
Table 7. REF Register Bit Description (C0 = 1, C1 = 0)
Table 8. REF Register
Table 9. R1:R11: Reference Divider Ratio (Bits 2 to 12)
*The reference counter cannot operate with division numbers less than 2.
R11
= 1
C0
1
—
0
0
1
.
.
.
Lucent Technologies Inc.
15:16
18:19
2:12
Bit
13
14
17
20
21
22
23
24
1
Last bit in serial sequence
R
2
1
R10
—
0
0
1
.
.
.
3
R
2
R
4
3
R9
—
0
0
1
.
.
.
R
5
4
R[1:11]
C0 = 1
D3, D4
D6, D7
C1 = 0
Name
ERES
EN1
RE
D1
D2
D5
LD
R
6
5
R8
—
0
0
1
.
.
.
R
7
6
R
8
7
R7
—
0
0
1
.
.
.
Register address bit. C0 = 1 for REF (last bit in serial sequence).
Reference frequency divide ratio.
Forced counter reload programming (synchronous/asynchronous).
Charge pump disable function.
Programable charge pump current for frequency band 2.
Phase detector polarity.
Programable charge pump current for frequency band 1.
Reset for first programming after powerup (1 = reset).
Enables external resistor (on RES pin) to set charge pump current.
Enable W3000. (0 is powerdown.)
Lock detect output enable.
Secondary address bit (first bit in serial sequence).
R
9
8
10
R
R6
9
—
0
0
1
.
.
.
11
10
R
R5
12
11
—
R
0
0
1
W3000 PLL Dual-Band Frequency Synthesizer
.
.
.
13
D
1
R4
—
14
0
0
1
.
.
.
D
2
15
D
3
Description
R3
—
0
0
1
.
.
.
16
D
4
17
D
5
R2
—
1
1
1
First bit in serial sequence
.
.
.
18
D
6
19
D
7
R1
—
0
1
1
.
.
.
RE ERES EN LD C1
20
21
Divide Ratio R
2047
22
—*
2
3
.
.
.
23
= 0
24
11