Motorola MCF5281 用户手册

MOTOROLA

Chapter 30.  Chip Configuration Module (CCM)  

30-1

The chip configuration module (CCM) controls the chip configuration and mode of
operation for the MCF5282.

The CCM performs these operations.

• Selects the chip operating mode:

— Master mode
— Single-chip mode

• Selects external clock or phase-lock loop (PLL) mode with internal or external 

reference

• Selects output pad drive strength
• Selects boot device and data port size
• Selects bus monitor configuration
• Selects low-power configuration
• Selects transfer size function of the external bus
• Selects processor status (PSTAT) and processor debug data (DDATA) functions
• Selects BDM or JTAG mode

The CCM configures the chip for two modes of operation:

• Master mode
• Single-chip mode

The operating mode is determined at reset and cannot be changed thereafter.