User Guide

RH-48
Troubleshooting — BB CCS Technical Documentation
Page 14 © 2003 Nokia Corporation Confidential Issue 1 11/2003
CBUSClk Interface
A 1.2 MHz clock signal is use for CBUS, which is used by the MCU to transfer data
between UEM and UPP. (See the following figure for Cbus data transfer.)
Figure 7: Cbus Data Transfer
DBUS Clk Interface
A 9.6 MHz clock signal is use for DBUS, which is used by the DSP to transfer data
between UEM and UPP. (See the following figure.)
Figure 8: Dbus data transferring