Clock Distribution; Rfclk (19.2 Mhz Analog) - Nokia RH-27 Series Technical Documentation Manual

CCS Technical Documentation
Maximum
Regulator current
(mA)
VCORE 300
DD/DC
VIO 150
VFLASH1 70
VFLASH2 40
VANA 80
VSIM 25
Maximum
Regulator current
(mA)
VR1A 10
VR1B 10
VR2 100
VR3 20
VR4 50
VR5 50
VR6 50
VR7 45
A charge pump used by VR1A is constructed around UEM. The charge pump works with
Cbus (1.2 MHz Clk) and gives a 4.75 V regulated output voltage to RF.

Clock Distribution

RFClk (19.2 MHz Analog)

The main clock signal for the baseband is generated from the voltage and temperature
controlled crystal oscillator VCTCXO (G503). This 19.2 MHz clock signal is generated at
the RF and fed to RFCLK pin of UPP.
Issue 1 11/2003 Confidential
Table 1: RH-27 Baseband Regulators
Vout (V) Notes
1.5 Output voltage selectable 1.0V/1.3V/1.5V/1.8V
Default power at power-up is 1.5V
1.8 Enabled always except during power-off mode
2.78 Enabled always except during power-off mode
2.78 Enabled only when data cable is connected
2.78 Enabled only when the system is awake (off during sleep and
power-off modes)
3.0 Not used on Columbia platform
Table 2: RH-27 RF Regulators
Vout (V) Notes
4.75 Enabled when the receiver is on
4.75 Enabled when the transmitter is on
2.78 Enabled when the transmitter is on
2.78 Enabled when SleepX is high
2.78 Enabled when the receiver is on
2.78 Enabled when the receiver is on
2.78 Enabled when the transmitter is on
2.78 Enabled when the receiver is on
©2003 Nokia Corporation
Troubleshooting - Baseband
RH-27
Page 11