MC68030CRC25C Freescale Semiconductor, MC68030CRC25C Datasheet - Page 342

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MC68030CRC25C

Manufacturer Part Number
MC68030CRC25C
Description
IC MPU 32BIT ENHANCED 128-PGA
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68030CRC25C

Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
128-PGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
MOTOROLA
C CREATE ATC ENTRY ~
TYPE ~
TYPE ~
Figure 9-25. Detailed Flowchart of M M U Table Search Operation
•NORMAL'
I
x ..,II.-- NEXT x (x = B. C, D)
T(x : 0 " " ' ~
'EARLY'
BYTE•OR+DYTE'
~
~ CREATE ATC ENTRY )
DT:'
• ~ D"
Tlx :~ 0
TYPE ~
LAST SIZE ~
TYPE ~
SIZ~-",~,---
EETCH DESCRI P TOR
CREATE ATC ENTRY
I
' E ARLY"
DT ' P AGE DESCRI P TOR
' E ARLY'
4
DT = ' P AGE DESCRI P TOR' I
OR 8
TYPE ~
S(ZE
-'O +
~
DETERMINE ROOT
~
FCL : "
(REFER TO TRUTH TABLE AT RIGHT)
MC68030 USER'S MANUAL
C + y
(
C CREATE
OT: 'PAGE DESCRIPTOR"
OT
'NORMAL
_..~ERFORM LIMIT
TYPE ~
= '4
SIZE ~
LASTSIZE ~
FETCH
TYPE ~
OT
x ~
y ~ l ~
• ~ d l - - -
BYTE'
: NVALID'
DESCRIPTOR
P' O INTER
ATC
I
I
I
I
l
C FETCH DESCRIPTOR
C CREATE ATC ENTRY .~
OR 'S BYTE'
TYPE
'(NVAUD
"ICVALID
4 DR 8
ENTRY
DT '4 BYTE' OR '8 BYTE'
]HECK
'A
'A'
CHECK~
RP'
TO
8
.,...C~ (CHECK DESCRI P TOR TYPE)
CK DESCRIPTOR TYPE
BE USED
FCL = 0
DESCRIPTOR
)
OTHERWISq 'INVALID •
x='D'
L ~ - , , ~ l ~
|
I
SIZE
/
TYPE OF ROOT
x ~
. . . , , . , . , ~ ' ~
P E R F O R M FUNCTION CORE LOOKUP IF REQUI R ED
R 8
x~='O
SIZ[
POINTER
NEXT x (x = B. C. 01
" ~ "
ENTERI N G A LEVEL TABLE SEARCF
ROOT POINTER SELECTI O N TBUTH TABLE
TIx ~" O
IS THE ASS[GNMENT OPERATOR
FC2
0
0
I
l
(REPEAT
SRE
0
1
1
0
i
SEARCH
ROOT
.CRP
CRP
CRP
SRP
9-41
9

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