Long-Word Operand To 16-Bit Port, Aligned; Long-Word Operand Write Timing To 8-Bit Port - Motorola MC68340 User Manual

S2
S0
CLKOUT
A31–A0
FC3–FC0
R/W
AS
DS
SIZ0
4 BYTES
SIZ1
DSACK0
DSACK1
D15–D8
D7–D0
WRITE
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
DATA BUS
CYCLE 1
CYCLE 2
3-12
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S4
S0 S2 S4
3 BYTES
OP0 OP1
(OP1)
(OP1)
WRITE
LONG-WORD OPERAND WRITE TO 8-BIT BUS
OP0 OP1
31 23 15
D15 D8 D7 D0
OP0 OP1
OP3
OP2
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S0 S2 S4 S0
2 BYTES
OP2
(OP3)
WRITE
OP2 OP3
7 0
SIZ1 SIZ0 A0
0 0 0
1 0 0
S2 S4
1 BYTE
OP3
(OP3)
WRITE
DSACK1 DSACK0
0 X
0 X
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