MC68HC000EI8R2 Freescale Semiconductor, MC68HC000EI8R2 Datasheet - Page 44

• Manufacturer Part Number: MC68HC000EI8R2
• Description: IC MPU 16BIT 8MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC000EI8R2

• Processor Type: M680x0 32-Bit
• Speed: 8MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

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.
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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