Cbusclk Interface; Dbusclk Interface - Nokia NPD-1 Series Troubleshooting - Bb

CCS Technical Documentation

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 figure below for Cbus data transfer.)

DBUSClk Interface

A 9.6 MHz clock signal is used for DBUS, which is used by the DSP to transfer data
between UEM and UPP. (See following figure.)
Issue 1 11/2002
Figure 9: Cbus data transfer
Figure 10: Dbus data transfer
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