3 functional description, 1 version 2 coldfire microarchitecture, Functional description -9 – Motorola ColdFire MCF5281 User Manual
Page 55: 1 version 2 coldfire microarchitecture -9

ColdFire Core
Freescale Semiconductor
2-9
2.3
Functional Description
2.3.1
Version 2 ColdFire Microarchitecture
, the non-Harvard architecture of the processor is readily apparent.
The processor interfaces to the local memory subsystem via a single 32-bit address and two unidirectional
32-bit data buses. This structure minimizes the core size without compromising performance to a large
degree.
A more detailed view of the hardware structure within the two pipelines is presented in
and
below. In these diagrams, the internal structure of the instruction fetch and operand execution
pipelines is shown:
Figure 2-9. Version 2 ColdFire Processor Instruction Fetch Pipeline Diagram
IAG
IC
IB
Core Bus
Address
Core Bus
Read Data
Opword
Extension 1
Extension 2
FIFO
IB
+4
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3