MC68030CRC25C Freescale Semiconductor, MC68030CRC25C Datasheet - Page 205
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MC68030CRC25C
Manufacturer Part Number
MC68030CRC25C
Description
IC MPU 32BIT ENHANCED 128-PGA
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68030FE20C.pdf
(599 pages)
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
-
- Current page: 205 of 599
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7
7-44
5) DRIVE SIZE (SIZO-SIZ1)
6) CACHE INHIBIT OUT (CI-' i ' O UT) BECOMES VALID
8) ASSERT DATA STROBE (O' S )
2) LATCH DATA
3) NEGATE AS AND OS
4) NEGATE DBEN
5) START DATA MODIFICATION
2) DRIVE ADDRESS ON AD-A31 (IF DIFFERENT)
3) DRIVE SIZE (SIZO-SIZ1)
4) SET R/WTO WRITE
5) CLOUT BECOMES VALID
6) ASSERT ~
8) PLACE DATA ON DO-D31
9) ASSERT O-S
2) REMOVE DATA FROM DO-D3|
3) NEGATE DBEN
1) ASSERT EDS/OSC FOR ONE-HALF CLOCK
2) SET R/WTO READ
3) DRIVE ADDRESS ON AO-A31
4) DRIVE FUNCTION CODE ON FCO-FC2
7) ASSERT ADDRESS STROBE (A'S)
9) ASSERT DATA BUFFER ENABLE (DREN)
11 SAMPLE CACHE INHIOITIN ICIIN~
1) ASSERT ECS/OCS FOR ONE*HALF CLOCK
7) ASSERT OBEN
}) NEGATE AS AND DS
1) NEGATE BMC
1) ASSERT READ-MODIFY-WRITE CYCLE (RMC)
TERMINATE OUTPUT TRANSFER
START OUTPUT TRANSFER
U N L O C K BUS
START NEXT CYCLE
ADDRESS DEVICE
Figure 7-29. Asynchronous Read-Modify-Write Cycle Flowchart
ACQUIRE DATA
PROCESSOR
lOCK BUS
- -
t
I
I
MC68030 USER'S MANUAL
2) PLACE DATA ON DO-D31
3) ASSERT DATA TRANSFER
2) NEGATE OSACKx
2) STORE DATA FROM DO-D31
3) ASSERT DSACKx
1) OECODE ADDRESS
1) REMOVE DATA FROM DO-D31
1) DECODE ADORESS
1) NEGATE DSACKx
AND SIZE ACKNOWLEDGE (DSACKx)
TERMINATE CYCLE
TERMINATE CYCLE
EXTERNAL DEVICE
PRESENT DATA
ACCEPT DATA
t
THEN GO TO ( ~ ; IF
WR]TfEN. THEN GO TO (~);
IF CAS2 INSTRUCTION AND
ONLY ONE OPERAND REAO,
OPERANDS DO NOT MATCH.
THEN GO TO © ; ELSE
GO TO ©
IF CAS2 INSTRUCTION ANO
ONLY ONE OPERAND
ELSE GO TO (~)
®
®
®
®
MOTOROLA
©
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