Clock Distribution - Nokia 1265 Description And Troubleshooting

Nokia Customer Care
The baseband is powered by the following PM regulators:
Rating
Regulator
Current
MSMC 500 mA
MSMA 150 mA
MSMP 300 mA
RUIM 150 mA
TCXO 50 mA
Note: All output regulators voltage accuracy +/-2%
Table 2 includes the PM regulators for the RF.
Rating
Regulator
Current
RFRX 150 mA
RFTX 150 mA
Note: All output regulators voltage accuracy +/-2%

Clock Distribution

The QSC6010 derives its internal clock from two clock inputs, TCXO and
SLEEP_CLK.
The main clock signal for the baseband generates from TCXO
(Temperature-compensated crystal oscillator). The QSC6010's TCXO clock input
supports the frequency 19.2 MHz +/-2ppm. The SLEEP_CLK provides a 32.768 kHz
+/-20ppm clock source to drive the MSM controller into sleep mode. At this mode,
most of the MSM is powered down and the TCXO is disabled.
Issue 1 04/2007
Voltage Notes
1.2 V Always enabled except during power-off mode
Enabled only when the system is powered on (Off
2.65 V
during sleep and power-off modes)
2.60 V Always enabled except during power-off mode
3.00 V Enabled only when RUIM card is used
Enabled only when the system is powered on (Off
2.85 V
during sleep and power-off modes)
Table 1: Baseband Regulators
Voltage Notes
2.60 V Enabled when the receiver is on
2.60 V Enabled when the transmitter is on
Table 2: RF Regulators
© 2007 Nokia Corporation
Baseband Description and Troubleshooting
Company Confidential
1265 (RH-103)
Page 9