Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Hoja De Datos

Atmel

Los códigos de productos

AT91SAM9N12-EK

Memory Management Unit

ARM DDI0198D

Copyright © 2001-2003 ARM Limited. All rights reserved.

3-7

Figure 3-2 Translating page tables

Translation

table

4096 entries

TTB base

Indexed by

modified

virtual

address

bits [31:20]

Section

1MB

Section base

Coarse page

table

256 entries

Fine page

table

1024 entries

Coarse page

table base

Fine page

table base

Large page

64KB

Small page

4KB

Tiny page

1KB

Large page

base

Indexed by

modified

virtual

address

bits [19:0]

Indexed by

modified

virtual

address

bits [19:12]

Indexed by

modified

virtual

address

bits [19:10]

Indexed by

modified

virtual

address

bits [15:0]

Indexed by

modified

virtual

address

bits [11:0]

Indexed by

modified

virtual

address

bits [9:0]