User Guide

Nokia Customer Care Troubleshooting - Baseband
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Issue 1 - Revision 002 09/2004 ©2004 Nokia Corporation Company Confidential Page 15
DBUS Clk Interface
A 9.6 MHz clock signal is used for DBUS, which is used by the DSP to transfer data
between the UEM and the UPP.
Figure 7: 9.6 MHz DBUS clock signal
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.