mc68ec060 Freescale Semiconductor, Inc, mc68ec060 Datasheet - Page 30

• Manufacturer Part Number: mc68ec060
• Description: Mc68060 Superscalar 68k Microprocessor Including The Lc060 And Ec060
• Manufacturer: Freescale Semiconductor, Inc

Introduction
The architecture of the MC68060 processor is implemented in the following major blocks:
These major units execute concurrently to maximize sustained performance. Note that the
caches reside on separate buses allowing concurrent instruction fetch, data read, and data
write operations (internal Harvard architecture).
1-6
EXECUTION UNIT
• Execution Unit
• Memory Units
• Bus Controller
EXECUTE
FETCH
—Instruction Fetch Unit
—Integer Unit
—FPU
—Instruction Memory Unit
—Data Memory Unit
FLOATING-
EA
FP
POINT
UNIT
• Instruction ATC
• Instruction Cache
• Instruction Cache Controller
• Data ATC
• Data Cache
• Data Cache Controller
OC
EX
BRANCH
CACHE
pOEP
DATA AVAILABLE
CALCULATE
EXECUTE
DECODE
WRITE-BACK
FETCH
INT
EA
EA
INSTRUCTION FETCH UNIT
INSTRUCTION
INTEGER UNIT
BUFFER
DS
AG
OC
EX
Figure 1-1. MC68060 Block Diagram
sOEP
CALCULATE
EXECUTE
DECODE
INSTRUCTION
FETCH
CALCULATE
DECODE
EA
INT
EA
FETCH
EARLY
IA
M68060 USER’S MANUAL
OPERAND DATA BUS
AG
OC
EX
DS
IB
IAG
IED
IC
WB
DA
INSTRUCTION
INSTRUCTION MEMORY UNIT
ATC
DATA
ATC
DATA MEMORY UNIT
INSTRUCTION
CONTROLLER
CONTROLLER
CACHE
CACHE
DATA
INSTRUCTION
CACHE
CACHE
DATA
O
O
B
U
S
C
N
T
R
L
L
E
R
MOTOROLA
CONTROL
ADDRESS
DATA