MC68HC000EI20 Freescale Semiconductor, MC68HC000EI20 Datasheet - Page 48

• Manufacturer Part Number: MC68HC000EI20
• Description: IC MPU 16BIT 20MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

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: -

5-2
1) SET R/W TO READ
2) PLACE FUNCTION CODE ON FC2–FC0
3) PLACE ADDRESS ON A23-A1
4) ASSERT ADDRESS STROBE (AS)
5) ASSERT UPPER DATA STROBE (UDS)
1) SET R/W TO READ
2) PLACE FUNCTION CODE ON FC2–FC0
3) PLACE ADDRESS ON A23–A1
4) ASSERT ADDRESS STROBE (AS)
5) ASSERT UPPER DATA STROBE (UDS)
1) LATCH DATA
2) NEGATE UDS AND LDS
3) NEGATE AS
1) LATCH DATA
2) NEGATE UDS AND LDS
3) NEGATE AS
OR LOWER DATA STROBE (LDS)
(BASED ON INTERNAL A0)
AND LOWER DATA STROBE (LDS)
ADDRESS THE DEVICE
ADDRESS THE DEVICE
ACQUIRE THE DATA
ACQUIRE THE DATA
START NEXT CYCLE
START NEXT CYCLE
BUS MASTER
BUS MASTER
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
Figure 5-1. Word Read-Cycle Flowchart
Figure 5-2. Byte Read-Cycle Flowchart
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
1) DECODE ADDRESS
2) PLACE DATA ON D7–D0 OR D15–D8
3) ASSERT DATA TRANSFER
1) REMOVE DATA FROM D7–D0
2) NEGATE DTACK
1) DECODE ADDRESS
2) PLACE DATA ON D15–D0
3) ASSERT DATA TRANSFER
1) REMOVE DATA FROM D15–D0
2) NEGATE DTACK
OR D15–D8
(BASED ON UDS OR LDS)
ACKNOWLEDGE (DTACK)
ACKNOWLEDGE (DTACK)
TERMINATE THE CYCLE
TERMINATE THE CYCLE
INPUT THE DATA
INPUT THE DATA
SLAVE
SLAVE
MOTOROLA