W3020 Datasheet, PDF (27/44 Pages) Agere Systems – GSM Multiband RF Transceiver

Advance Data Sheet
December 1999
W3020 GSM Multiband RF Transceiver
Programming Information (continued)
CONFIG Register (continued)
Table 28. C10: LO2 PLL Enable
When low, disables counters, phase detector, and charge pump of the LO2 PLL. This mode is provided for
applications utilizing an external programmable IF PLL.
C10
Bit 19
0
1
Function
LO2 PLL Disabled
LO2 PLL Operational (normal)
Table 29. OLD: Overload Output Disable
When high, forces overload output pin to be a logic low level. Otherwise, overload pin indicates overload.
OLD
Bit 18
0
1
Function
Overload Detect Output for IF/Baseband Enabled
Overload Detect Output for IF/Baseband Disabled
Table 30. C9: RF Mixer On During Settling
When high, enables receive RF mixer during receive PLL settling mode. In default operation, this bit should be
set to 0. If there were a problem with the VCO kicking when going from settling mode to full receive mode, it
could be set high.
C9
Bit 17
0
1
Function
Default: RX Mixer Off During RX Settling Mode (MO[3:1] = 101)
RX Mixer On During RX Settling Mode (MO[3:1] = 101)
Table 31. VO: LO1 Buffer Mode
VO
Bit 16
0
1
Not Allowed
LO1 Buffer Mode
Function
Table 32. C8: LO2 Charge Pump Off
C8
Bit 15
0
1
Function
Normal LO2 Charge Pump Operation
Charge Pump Off (high impedance) or CP2 Test Mode
Lucent Technologies Inc.
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