Owners manual

System

4.3. CCU

4.3.1. Overview

The CCU controls the PLLs configuration and most of the clock generation, division, distribution, synchronization and

gating. CCU input signals include the external clock for the reference frequency (24MHz). The outputs from CCU are

mostly clocks to other blocks in the system.

The CCU includes the following features:

 9 PLLs, independent PLL for CPUX

 Bus Source and Divisions

 PLLs Bias Control

 PLLs Tunning Control

 PLLs Pattern Control

 Configuring Modules Clock

 Bus Clock Gating

 Bus Software Reset

4.3.2. Functionalities Description

4.3.2.1. System Bus

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