MC68030FE20C Freescale Semiconductor, MC68030FE20C Datasheet - Page 306

• Manufacturer Part Number: MC68030FE20C
• Description: IC MPU 32BIT ENHANCED 132-CQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68030FE20C

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

MOTOROLA
System software selects the parameters for the translation tables by confi-
guring the translation control register (TC) appropriately. The function codes
or a portion of the logical address can be defined as the index into the first
as 15 bits can be used at a given level).
level of lookup in the table. The TC register specifies how many bits of the
logical address are used as the index for each level of the lookup (as many
An MMU translation table has a tree structure with the base of the first table
translation table is resident in one of two root pointer registers. The general
tree structure is shown in Figure 9-3. Table entries at the upper levels of a
tree point to other tables. The table leaf entries are page frame addresses.
translation tables reside in the physical address space.
defined by a root pointer descriptor. The root pointer descriptor of the current
All addresses stored in the translation tables are physical addresses; the
DD
'
ROOT POI N TER ~
Figure 9-3. Translation Table Tree
MC68030 USER'S MANUAL
F I
I
F'~
I
POI N TER
TABLES
TABLES
PABE
9-5
9