MC68EC040RC25 Freescale Semiconductor, MC68EC040RC25 Datasheet - Page 69

• Manufacturer Part Number: MC68EC040RC25
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC040RC25

• 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: Through Hole
• Pin Count: 179
• Package Type: PGA
• Lead Free Status / Rohs Status: Supplier Unconfirmed

interpretation allows the operating system to store system-defined information in the
remaining bits. Information typically stored includes the reason for the invalid encoding
(tables paged out, region unallocated, etc.) and possibly the disk address for nonresident
tables. Figure 3-16 illustrates an address translation table in which only a single page
table (table $15) is resident; all other page tables are not resident.
3-20
ADDRESS OFFSET =
TABLE ENTRY # =
$76543210 =
Figure 3-16. Translation Table with Nonresident Tables
SRP
0 1 1 1 0 1 1 0 0 1 0 1 0 1 0 0 0 0 1 X X X X X X X X X X X X X
ROOT INDEX
Freescale Semiconductor, Inc.
$EC
$3B
For More Information On This Product,
$3B
UDT = RESIDENT
NONRESIDENT
UNALLOCATED)
NONRESIDENT
UNALLOCATED)
UDT = INVALID
SUPERVISOR
UDT = INVALID
UDT = INVALID
UDT = INVALID
M68040 USER'S MANUAL
ROOT-LEVEL
(PAGED OR
(PAGED OR
TABLE $00
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TABLES
POINTER INDEX
$15
$54
LOGICAL ADDRESS
PAGE INDEX
$15
$01
$04
UDT = RESIDENT
UNALLOCATED)
UNALLOCATED)
POINTER-LEVEL
NONRESIDENT
UDT = INVALID
UDT = INVALID
UDT = INVALID
NONRESIDENT
UDT = INVALID
(PAGED OR
(PAGED OR
TABLE $7F
TABLE $3B
TABLE $00
TABLES
PAGE OFFSET
$01
FRAME ADDRESS
UNALLOCATED)
UNALLOCATED)
NONRESIDENT
NONRESIDENT
PAGE-LEVEL
(PAGED OR
(PAGED OR
TABLE $00
TABLE $1F
TABLE $15
TABLES
MOTOROLA