Motorola MCF5282, MCF5281 user manual Write Cycle, Write cycle timing diagram is shown in Figure

Data Transfer Operation

•In S4, the external device can stop driving data after the rising edge of CLKOUT. However data could be driven up to S5.

•For a read cycle, the external device stops driving data between S4 and S5. States are described in Table 13-3.

13.4.4 Write Cycle

During a write cycle, the MCF5282 sends data to the memory or to a peripheral device. The write cycle flowchart is shown in Figure 13-7.

MCF5282

1.Set R/W to write

2.Place address on A[31:0]

3.Assert TIP and SIZ[1:0]

4.Assert TS

5.Place data on D[31:0]

6.Negate TS

1. Sample TA low

2.Stop driving data from D[31:0]

1. Start next cycle

System

1.Decode address

2.Store data on D[31:0]

3.Assert TA

1.Negate TA

Figure 13-7. Write Cycle Flowchart

The write cycle timing diagram is shown in Figure 13-8.

CLKOUT

A[31:0], SIZ[1:0]

R/W

TIP

TS

CSn, BSn

D[31:0]

TA

S0	S1	S2	S3	S4	S5
			Write

Figure 13-8. Basic Write Bus Cycle

Table 13-3describes the six states of a basic write cycle.

13-8 MCF5282 User’s Manual MOTOROLA