mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 255

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

Memory Management Unit
11.6.2.1 MMU DATA CAM ENTRY READ REGISTER. When the content-addressable
memory of the MMU data CAM entry read (MD_CAM) register is read, it contains the
effective address and page sizes of an entry indexed by the DTLB_INDX field of the
MD_CTR. This register is only updated when you write a value to it.
EPN—Effective Page Number
These bits are the most-significant bits of the page’s effective address.
SPVF—Subpage Validity Flags
MD_CAM
NOTE: — = Undefined.
RESET
RESET
FIELD
ADDR
FIELD
ADDR
R/W
R/W
BIT
BIT
For Bit 20:
0 = Subpage 0 (address[20:21] = 00) is not valid.
1 = Subpage 0 (address[20:21] = 00) is valid.
For Bit 21:
0 = Subpage 1 (address[20:21] = 01) is not valid.
1 = Subpage 1 (address[20:21] = 01) is valid.
For Bit 22:
0 = Subpage 2 (address[20:21] = 10) is not valid.
1 = Subpage 2 (address[20:21] = 10) is valid.
For Bit 23:
0 = Subpage 3 (address[20:21] = 11) is not valid.
1 = Subpage 3 (address[20:21] = 11) is valid.
16
0
17
1
EPN
—
R
18
2
Freescale Semiconductor, Inc.
For More Information On This Product,
19
3
20
MPC823 REFERENCE MANUAL
4
Go to: www.freescale.com
21
5
SPVF
—
R
22
6
23
SPR 824
SPR 824
7
EPN
—
R
24
8
PS
25
—
R
9
10
26
SH
11
27
—
R
12
28
13
29
ASID
—
R
MOTOROLA
14
30
15
31