mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 201

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

SET—Set Select
This field is used to select the set index of the cache array.
WORD—Word Select
This field is used to select a word within a set and way.
Bits 30–31—Reserved
These bits are reserved and must be set to 0.
When read from the data array, the 32 bits of the word selected by the IC_ADR is placed in
the targeted general-purpose register. When read from the tag array, the 22 bits of the tag
and related information that is selected by the IC_ADR are all placed in the targeted
general-purpose register. The following table provides the bit layout of the instruction cache
data register when reading a tag.
TAG—Tag Select
This field contains the upper 22 bits of the address.
V—Valid Entry
L—Lock Entry
LRU—Least-Recently Used
This bit indicates that the entry is aged or least recently used.
IC_DAT (TAG READ FORMAT)
NOTE: — = Undefined.
RESET
RESET
FIELD
FIELD
SPR
SPR
R/W
R/W
BIT
BIT
0 = Entry is not valid.
1 = Entry is valid.
0 = Entry is unlocked.
1 = Entry is locked.
16
0
17
1
18
2
TAG
R/W
Freescale Semiconductor, Inc.
—
For More Information On This Product,
19
3
20
MPC823 REFERENCE MANUAL
4
Go to: www.freescale.com
21
5
R/W
22
—
V
6
R/W
23
—
7
L
TAG
R/W
562
562
—
LRU
24
—
R
8
25
9
10
26
11
27
RESERVED
R/W
12
28
—
Instruction Cache
13
29
14
30
9-13
15
31