mpc604e Freescale Semiconductor, Inc, mpc604e Datasheet - Page 8

• Manufacturer Part Number: mpc604e
• Description: Powerpc 604e-tm Risc Microprocessor Technical Summary
• Manufacturer: Freescale Semiconductor, Inc

1.2 PowerPC 604e Microprocessor Hardware
This section provides an overview of the 604e’s hardware implementation, including descriptions of the
functional units, shown in Figure 2, the cache implementation, MMU, and the system interface.
Note that Figure 2 provides a more detailed block diagram than that presented in Figure 1—showing the
additional data paths that contribute to the improved efficiency in instruction execution and more clearly
shows the relationships between execution units and their associated register files.
CR result bus
8
RS(2)
CRU
•
•
Performance monitor can be used to help in debugging system designs and improving software
efficiency, especially in multiprocessor systems.
In-system testability and debugging features through JTAG boundary-scan capability
Implementation
Branch
correction
RS(2)
BPU
RS(2)
SCIU
Completion
Fetch Unit
Unit
RS(2)
SCIU
Figure 2. Block Diagram—Internal Data Paths
GPR result buses
RS(1)
MCIU
4-way, 8 words/block
32-Kbyte data cache
GPR operand buses
(Four-instruction
PowerPC 604e RISC Microprocessor Technical Summary
Dispatch Unit
RS(2)
LSU
dispatch)
Instruction dispatch buses
Result status buses
FPR result buses
FPR operand buses
RS(2)
FPU
Result buses
Operand buses