W3020 Datasheet, PDF (34/44 Pages) Agere Systems – GSM Multiband RF Transceiver

W3020 GSM Multiband RF Transceiver
Advance Data Sheet
December 1999
Programming Example (continued)
Table 46. Perform Receive (W3020)
TR register: full receive mode; set DGC gain to 60 dB gain setting with LNA on (G0 = 1) and with normal dc
offset calibration; band bit B = 1.
Bit 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 No. A0 A1 G0 G1 G2 G3 G4 G5 G6 T0 T1 T2 DS DP FTR T3 T4 T5 T6 MO1 MO2 MO3 B A2
Setting 0 0 1 1 1 1 1 0 0 0 0 0 0 0 1 0 0 0 0 1
1
1 11
Note: Hex value = f8407C.
To change gain settings and remain in receive mode without redoing dc offset calibration, repeat the bus
transaction above with dc skip bit high (DS = 1). It should be noted that as dc offset is gain-dependent, dc skip
mode can be used only for receive signal levels where dc offset is insignificant.
Table 47. Settle PLL in GSM1800 Band for Transmit Mode (W3020/W3000)
MAIN register: switch W3020 to transmit settling mode to allow LO2 to settle; band bit B = 1.
(W3000 is programmed at the same time to settle LO1 to 1567 MHz frequency with N = 7835 to transmit at
1747 MHz.)
Bit 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 No. A0 A1 A2 A3 A4 A5 A6 A7 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 MO1 MO2 MO3/EN B A1
Setting 0 1 1 0 1 1 0 0 0 1 0 1 1 1 1 0 0 0 0 0 0
1
10
Notes:
Hex value = 607A36.
Italics indicate W3000 bits.
Table 48. Basic GSM1800 Transmit Burst (W3020)
TR register: full transmit mode; band bit B = 1.
Bit 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 No. A0 A1=0 G0 G1 G2 G3 G4 G5 G6 T0 T1 T2 DS DP FTR T3 T4 T5 T6 MO1 MO2 MO3 B A2
Setting 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1
1 11
Note: Hex value = f00000.
To change to the GSM900 MHz band for the example above, band bit B must be changed to B = 0 and the
appropriate channel programming must be set up for the W3000 synthesizer.
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