MC68020FE20E Freescale Semiconductor, MC68020FE20E Datasheet - Page 59

• Manufacturer Part Number: MC68020FE20E
• Description: IC MICROPROCESSOR 32BIT 132CQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68020FE20E

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

Figure 5-7 shows a word write to an 8-bit bus port. Like the preceding example, this
example requires two bus cycles. Each bus cycle transfers a single byte. SIZ1 and SIZ0
for the first cycle specify two bytes; for the second cycle, one byte. Figure 5-8 shows the
associated bus transfer signal timing.
5-12
Figure 5-7. Word Operand Write to Byte Port Example
15
D31 DATA BUS D24
BYTE MEMORY
Freescale Semiconductor, Inc.
OP2
For More Information On This Product,
OP2
OP3
WORD OPERAND
M68020 USER’S MANUAL
Go to: www.freescale.com
SIZ1 SIZ0 A1
1
0
MC68020/EC020
OP3
0
1
0
0
0
A0
0
1
MEMORY CONTROL
DSACK1
H
H
DSACK0
L
L
MOTOROLA