Motorola MPC823e - Page 225

Memory Management Unit
MOTOROLA MPC823e REFERENCE MANUAL 11-7
MEMORY MANAGEMENT
11
UNIT
Figure 11-3. Two Level Translation Table When MD_CTR(TWAM) = 0
LEVEL 2 INDEX
PAGE OFFSET
LEVEL ONE TABLE POINTER
01112212231
LEVEL ONE TABLE BASE LEVEL 1 INDEX 00
017
LEVEL ONE DESCRIPTOR 0
LEVEL ONE DESCRIPTOR 1
LEVEL ONE DESCRIPTOR N
LEVEL ONE DESCRIPTOR 4095
18
12
EFFECTIVE ADDRESS
LEVEL ONE TABLE
REAL ADDRESS
12 - FOR 4K
10
LEVEL 1 INDEX
18
20
LEVEL TWO TABLE BASE LEVEL 2 INDEX 00
12
14 - FOR 16K
19 - FOR 512K
23 - FOR 8M
LEVEL TWO DESCRIPTOR 0
LEVEL TWO DESCRIPTOR 1
LEVEL TWO DESCRIPTOR N
LEVEL TWO DESCRIPTOR 1023
10
LEVEL TWO TABLE
20
REAL PAGE ADDRESS PAGE OFFSET
20 - FOR 4K
18 - FOR 16K
13 - FOR 512K
9 - FOR 8M
20 - FOR 1K
12 - FOR 1K