Motorola MC68340 manual Long-Word Operand Write Timing to 8-Bit Port

Freescale Semiconductor, Inc...

		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
	4 BYTES			3 BYTES			2 BYTES			1 BYTE
SIZ1
DSACK0
DSACK1
D15–D8		OP0			OP1			OP2			OP3
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

3.2.3.7LONG-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	D15	D8 D7		D0		SIZ1	SIZ0	A0	DSACK1	DSACK0
CYCLE 1	OP0		OP1			0	0	0	0	X
CYCLE 2	OP2		OP3			1	0	0	0	X

3- 12MC68340 USER’S MANUALMOTOROLA

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