mc68ec040v Freescale Semiconductor, Inc, mc68ec040v Datasheet - Page 428

• Manufacturer Part Number: mc68ec040v
• Description: M68040 User Manual
• Manufacturer: Freescale Semiconductor, Inc

APPENDIX D
M68000 FAMILY SUMMARY
This appendix summarizes the characteristics of the microprocessors in the M68000
family. The M68000PM/AD, M68000 Family Programmer's Reference Manual, includes
more detailed information on the M68000 Family differences.
*The MC68010 supports a three-word cache for the loop mode.
MOTOROLA
Data Bus Size (Bits)
Address Bus Size (Bits)
Instruction Cache (In Bytes)
Data Cache (In Bytes)
MC68000, MC68008, MC68010
MC68020, MC68030
MC68040
MC68000, MC68008, MC68010
MC68020, MC68030, MC68040
MC68000, MC68008
MC68010
MC68020
MC68030
MC68040
Attribute
Freescale Semiconductor, Inc.
For More Information On This Product,
Word/Long-Word Data Alignment
MC68000
16
24
—
—
Coprocessor Interface
M68040 USER’S MANUAL
Go to: www.freescale.com
Control Registers
MC68008
20
—
—
8
In Microcode
SFC, DFC, VBR
Emulated in Software
Emulated in Software (On-Chip Floating-Point Unit)
Word/Long-Word Data, Instructions, and Stack
Must Be Word Aligned
Only Instructions Must Be Word Aligned
(Data Alignment Improves Performance)
None
SFC, DFC, VBR, CACR, CAAR
SFC, DFC, VBR, CACR, CAAR, CRP, SRP, TC, TT0,
TT1, MMUSR
SFC, DFC, VBR, CACR, URP, SRP, TC, DTT0, DTT1,
ITT0, ITT1, MMUSR
3 * (Words)
MC68010
16
24
—
MC68020
8, 16, 32
256
32
—
MC68030
8, 16, 32
256
256
32
MC68040
4096
4096
32
32
D- 1