mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 243

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Memory Management Unit
11.6.1.7 MMU DATA REAL PAGE NUMBER REGISTER. The MMU data real page
number (MD_RPN) register contains the physical address and the storage attributes of an
entry to be loaded into a translation lookaside buffer. This register must be written after the
MD_EPN and MD_TWC registers.
RPN—Real Page Number
These bits are the most-significant bits of the page’s physical address.
PP1—Protection for the First 1K Subpage in a 4K Page
This field contains protection code for the first subpage in a 4K page. Depending on Bit 22
of the PP2 field, the same protection code has different protection schemes.
MD_RPN
NOTE: — = Undefined. The default values depend on the state of system memory.
RESET
RESET
FIELD
ADDR
FIELD
ADDR
R/W
R/W
BIT
BIT
16
0
17
1
RPN
R/W
—
18
2
SETTING
Freescale Semiconductor, Inc.
PP1
00
01
10
11
For More Information On This Product,
4K PAGES WITH 1K RESOLUTION PROTECTION
19
3
20
MPC823 REFERENCE MANUAL
4
PRIVILEGED MODE
PP1
R/W
—
Go to: www.freescale.com
Read/Write
Read/Write
Read/Write
21
No access
5
22
6
PP2
R/W
—
DATA PAGES
23
SPR 798
SPR 798
7
RPN
R/W
—
24
8
PROBLEM MODE
PP3
R/W
—
Read/Write
No access
No access
Read-only
25
9
10
26
PP4
R/W
—
11
27
R/W
LPS
12
28
—
R/W
SH
13
29
—
MOTOROLA
R/W
14
30
CI
—
R/W
15
31
—
V