User Guide

RM-11
Troubleshooting - Baseband CC Technical Documentation
Page 14 ©2004 Nokia Corporation Confidential Issue 1 02/2004
The system clock can be stopped during sleep mode by disabling the VCTCXO power
supply from the UEM regulator output (VR3) by turning off the controlled output signal
SLEEPX from the UPP.
SleepCLK (Digital)
The UEM provides a 32 kHz sleep clock for internal use and to the UPP, where it is used
for the sleep mode timing.
Figure 8: 32 kHz digital sleep clock signal