Freescale Semiconductor, Inc.
S0
S2
S4
S0
S2
S4
S0
S2
S4
S0
S2
S4
CLKOUT
A31–A0
FC3–FC0
R/W
AS
DS
SIZ0
1 BYTE
3 BYTES
4 BYTES
2 BYTES
SIZ1
DSACK0
DSACK1
OP0
OP1
OP2
OP3
D15–D8
D7–D0
(OP1)
(OP1)
(OP3)
(OP3)
WRITE
WRITE
WRITE
WRITE
LONG-WORD OPERAND WRITE TO 8-BIT BUS
Figure 3-4. Long-Word Operand Write Timing to 8-Bit Port
3.2.3.7 LONG-WORD OPERAND TO 16-BIT PORT, ALIGNED. Figure 3-5 shows both
long-word and word read and write timing to a 16-bit port.
LONG-WORD OPERAND
OP0
OP1
OP2
OP3
31
23
15
7
0
DATA BUS
CYCLE 1
CYCLE 2
D15
D8 D7
D0
SIZ1
0
1
SIZ0
0
0
A0
0
0
DSACK1 DSACK0
OP0
OP2
OP1
OP3
0
0
X
X
3- 12
MC68340 USER’S MANUAL
MOTOROLA
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