W3020 Datasheet, PDF (26/44 Pages) Agere Systems – GSM Multiband RF Transceiver

W3020 GSM Multiband RF Transceiver
Advance Data Sheet
December 1999
Programming Information (continued)
CONFIG Register
The CONFIG register contains bits to control various options for dc offset correction, filter-tuning, lock detect,
and overload outputs, etc. It is expected that this register would be written once at initialization and then rarely
updated. Since it is not affected by the power-on reset circuit, a write to this register should be the first operation
performed when accessing the W3020 chip. Also, it is advisable never to update the configuration register while
a critical operation is in progress.
Last bit in serial sequence
First bit in serial sequence
Bit No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Bit A0=1 A1=0 RS DT0 DT1 DT2 C1 C2 C3 C4 C5 C6 C7 LD2 C8 VO C9 OLD C10 F1 F2 F3 F4 A2=1
Table 27. CONFIG Register
Bit No.
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Bit
A2
F4
F3
F2
F1
C10
OLD
C9
VO
C8
LD2
C7
C6
C5
C4
C3
C2
C1
DT[2]
DT[1]
DT[0]
RS
A1
A0
SC1 Standard
Setting
1
0
0
0
0
1
0
0
1
0
1
0
0
0
1
0
0
1
0
1
1
1*
0
1
Address Bit 2
Reserved
Function
Enable of LO2 PLL (See Table 28.)
Disable of Overload Pin Output Signal, When High (See Table 29.)
Force RF Mixer On When RX LO1 Buffer Is On, When High (See
Table 30.)
Reserved; Always High (See Table 31.)
LO2 Charge Pump Output Off (high impedance), When High (See
Table 32.)
Enable LO2 Lock Detect Output, When High (See Table 33.)
Select dc Offset Correction/Fine Tune, When High (See Table 34.)
Disable LP Filter Bandwidth Tune and Use Default Value, When High
(See Table 35.)
Disable dc Offset Correction and Use Default Setting, When High (See
Table 36.)
High Bandwidth Setting of Baseband Path, When High (See Table 37.)
RX LO1 Buffer On During dc Calibration When High (See Table 38.)
LNA On During dc Calibration, When High (See Table 39.)
LO2 Phase Detector Polarity, Positive Slope, When High (See
Table 40.)
dc Offset Correction Time (See Table 41.)
Resets Bit Content in Other Registers, When High (See Table 42.)
Address Bit 1
Address Bit 0
* It is recommended that a reset be programmed after power-on. Reset does not affect the content of the CONFIG register.
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Lucent Technologies Inc.