MC68040FE25A Freescale Semiconductor, MC68040FE25A Datasheet - Page 244

• Manufacturer Part Number: MC68040FE25A
• Description: IC MICROPROCESSOR 32BIT 184-CQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68040FE25A

• Processor Type: M680x0 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 184-CQFP
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 25MHz
• Instruction Set Architecture: RISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 184
• Package Type: CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Compliant

MOTOROLA
All Read
Access Errors
Cache Push
Physical Bus
Error c
Normal Write
Physical bus
Error
MOVE16
Write Physical
Bus Error
Write Page
Fault
Impossible
Write Cases
NOTES:
Main Case
a. The data memory unit stage is tied up until the bus controller passes the read back through the data memory
b. If any kind of access error is reported and if a MOVE16 write is pending in the WB2 stage, then that MOVE16
c. A cache push physical bus error is normally considered a fatal error. For these cases, the FA field is a physical
d. Indicates that the data should not be written even though the V-bit for it is set (WB2 corresponds to a MOVE16
e. The exception handler must alter the stacked PC to point past the MOVE16 and predecrement and
f. 1V must be 0 for push exceptions.
g. The execution stage does not post a write until the MOVE16 is in the integer unit.
unit and to the execution stage in the integer unit. Therefore, no pending write is possible in WB1 or WB2.
WB3 could hold a pending write that was deferred due to operand read or was generated after the read.
read must hit in the cache so the MOVE16 can be safely restarted since it has not caused bus cycles that could
retouch peripherals.
address, not a logical address as in the other cases.
write).
postincrement address registers.
SSW_RW SSW_PUSH 1V 1M16 2V 2M16
1 a
1 a
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 8-6. Access Error Stack Frame Combinations
Don't Care
Freescale Semiconductor, Inc.
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
For More Information On This Product,
All other read cases are not possible.
X
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
1
WB1S
Go to: www.freescale.com
M68040 USER’S MANUAL
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
0
1
1
1
1
1
X
X
0
0
0
0
1
1
1
0
0
1
1
1
0
0
1
1
1
1
1
1
WB2S
X
X
X
X
X
X
X
X
X
0
0
1
0
0
1
0
0
1
0
0
1
1
WB3S
3V
X
0
1
0
1
0
1
0
0
1
0
1
0
1
0
0
1
0
0
1
0
1
None
WB3D
PD3–0
PD3–0, WB3D
PD3–0, WB2D
PD3–0, WB2D, WB3D
PD3–0, ~WB2D d
WB1D
WB1D, WB3D
WB1D, WB2D
WB1D, WB2D, WB3D
WB1D, ~WB2D d
PD3–0, WB3D
PD3–0
PD3–0, WB2D
PD3–0, WB2D, WB3D
PD3–0, ~WB2D d
WB2D
WB2D, WB3D
~WB2D d
(Note f)
(Note g)
Easy Cleanup
Data Written
Hard Cleanup
Write PD3–0
and skip e .
(Note b)
(Note b)
(Note b)
(Note b)
Action
—
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