MC68EC040RC25 Freescale Semiconductor, MC68EC040RC25 Datasheet - Page 60

• Manufacturer Part Number: MC68EC040RC25
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC040RC25

• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 25MHz
• Instruction Set Architecture: RISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 179
• Package Type: PGA
• Lead Free Status / Rohs Status: Supplier Unconfirmed

MOTOROLA
ABBREVIATIONS:
NOTE :
CREATE ATC ENTRY
EXIT TABLE SEARCH
WITH R-BIT CLEAR
RETURN
THE U-BIT OCCURS AFTER THE READ OF
THE NEXT LEVEL DESCRIPTOR.
DUE TO ACCESS PIPELINING, A POINTER
DESCRIPTOR WRITE ACCESS TO UPDATE
WP – ACCUMULATED WRITE-
V – LOGICAL "OR" OPERATOR
Figure 3-10. Detailed Flowchart of Descriptor Fetch Operation
– ASSIGNMENT OPERATOR
PROTECTION STATUS
'INVALID'
WRITE ACCESS
(SEE NOTE)
SCHEDULE
WRITE ACCESS (U
IF SCHEDULED, EXECUTE
(INDEX = RI, PI, OR PGI)
U
PREVIOUS DESCRIPTOR
AT PA = TA + (INDEX*4)
FETCH DESCRIPTOR
OTHERWISE
TYPE = 'PAGE' OR 'POINTER'
U = 0
1
(SEE NOTE)
WP = WP V W
Freescale Semiconductor, Inc.
'RESIDENT'
RETURN
For More Information On This Product,
U = 1
1) FOR
'POINTER'
UPDATE HISTORY AND STATUS
TYPE =
Go to: www.freescale.com
M68040 USER'S MANUAL
OF ALL BUS TRANSFERS
FETCH DESCRIPTOR &
NORMAL TERMINATION
U = 1
READ ACCESS
TYPE = 'PAGE'
OR 'INDIRECT'
TYPE = 'INDIRECT'
U = 0
PA = DESCRIPTOR ADDRESS
FETCH DESCRIPTOR AT
RMW ACCESS
WP = WP V W
EXECUTE
'RESIDENT'
LOCKED
U
OF ALL BUS TRANSFERS
NORMAL TERMINATION
(WP = 1 OR M = 1)
1
U = 0 &
WRITE ACCESS
RETURN
OR 'INDIRECT'
'INVALID'
WRITE ACCESS
WP = 0 & M = 0
U
EXECUTE
OTHERWISE
1, M
RETURN
(WP = 1 OR M = 1)
1
U = 1 &
CREATE ATC ENTRY
EXIT TABLE SEARCH
WITH R-BIT CLEAR
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