MC68HC000EI20 Freescale Semiconductor, MC68HC000EI20 Datasheet - Page 44
MC68HC000EI20
Manufacturer Part Number
MC68HC000EI20
Description
IC MPU 16BIT 20MHZ 68-PLCC
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC000IEI16.pdf
(189 pages)
Specifications of MC68HC000EI20
Processor Type
M680x0 32-Bit
Speed
20MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
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4-6
1) SET R/W TO READ
2) PLACE FUNCTION CODE ON FC2–FC0
3) PLACE ADDRESS ON A23–A0
4) ASSERT ADDRESS STROBE (AS)
5) ASSERT LOWER DATA STROBE (LDS)
1) LATCH DATA
1) NEGATE LDS OR DS
2) START DATA MODIFICATION
1) SET R/W TO WRITE
2) PLACE DATA ON D7–D0
3) ASSERT LOWER DATA STROBE (LDS)
1) NEGATE DS OR LDS
2) NEGATE AS
3) REMOVE DATA FROM D7–D0
4) SET R/W TO READ
(DS ON MC68008)
(DS ON MC68008)
TERMINATE OUTPUT TRANSFER
START OUTPUT TRANSFER
ADDRESS THE DEVICE
ACQUIRE THE DATA
START NEXT CYCLE
BUS MASTER
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
Figure 4-5. Read-Modify-Write Cycle Flowchart
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
1) REMOVE DATA FROM D7–D0
2) NEGATE DTACK
1) DECODE ADDRESS
2) PLACE DATA ON D7–D0
3) ASSERT DATA TRANSFER
1) STORE DATA ON D7–D0
2) ASSERT DATA TRANSFER
1) NEGATE DTACK
ACKNOWLEDGE (DTACK)
ACKNOWLEDGE (DTACK)
TERMINATE THE CYCLE
TERMINATE THE CYCLE
INPUT THE DATA
INPUT THE DATA
SLAVE
MOTOROLA
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