W3020 Datasheet, PDF (28/44 Pages) Agere Systems – GSM Multiband RF Transceiver

W3020 GSM Multiband RF Transceiver
Advance Data Sheet
December 1999
Programming Information (continued)
CONFIG Register (continued)
Table 33. LD2: Lock Detect Enable
LD2
Bit 14
0
1
Function
Lock Detect Output for LO2 Disabled
Lock Detect Output for LO2 Enabled
Note: When disabled, the lock detect output is a logic level high. When lock detect is
enabled but 540 MHz PLL is not locked, LD output is pulsing low. When lock
detect is enabled and 540 MHz PLL is locked, LD output is high.
Table 34. C7: dc Coarse/Fine Correction
When this bit is low, coarse offset calibration is done such that the SC1's offset calibration can be done
simultaneously. When this bit is high, a fine calibration is done, but this is not compatible with the SC1.
C7
Bit 13
0
1
Function
Coarse dc Correction Tuning (for interface with baseband with calibration function) with Output
Buffer dc Connection Retained
Fine Tune (no baseband calibration required), No Output Available During Calibration
Table 35. C6: Filter Tune Disable
Disable LP filter bandwidth tune and use default value.
C6
Bit 12
0
1
Bandwidth Setting
Use Calibration
Use Default
Function
Requires LPF Tune Request Cycle to Be Executed
Always Use Default Noncorrected Value (less accurate)
Table 36. C5: dc Correction Disable
C5
Bit 11
0
1
Function
Correction Cycle Before Each RX
Always Use Default Noncorrected Value
Table 37. C4: Low-Pass Filter Bandwidth
C4
Bit 10
0
1
Function
Low Bandwidth (115 kHz)*
High Bandwidth (168 kHz) for Use with SC1, etc.
* Not tested or recommended for use.
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