User`s manual

FUNCTIONAL DESCRIPTION
MPC505EVBUM/D 3-3
3.3 MCU SUMMARY
The resident MC68332 Microcontroller Unit (MCU) of the BCC provides resources for
designing, debugging, and evaluating MC68332 MCU based target systems and simplifies user
evaluation of prototype hardware/software products.
The MCU device is a 32-bit integrated microcontroller, combining high-performance data
manipulation capabilities with powerful peripheral subsystems. The MCU includes:
• 32-bit central processor unit (CPU32)
• Time processor unit (TPU)
• Queued serial module (QSM)
• Random access memory (RAM)
• External bus interface
• Chip selects
• System clock
• Test module
3.3.1 32-Bit Central Processor Unit
The CPU32 is the central processor for the MC68332 MCU device. The CPU32 is source and
object code compatible with the MC68000 and MC68010. All user programs can be executed
unchanged. The CPU32 features are:
• 32-Bit internal data path and arithmetic hardware - 16-bit external data bus
• 32-Bit internal address bus - 24-bit external address bus
• Powerful instruction set
• Eight 32-bit general purpose data registers
• Seven 32-bit general purpose address registers
• Separate user and supervisor stack pointers and address spaces
• Separate program and data address spaces
• Flexible addressing modes
• Full interrupt processing