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6: The Bus Interface
6-6 EPSON ARM720T CORE CPU MANUAL
Figure 6-4 shows some examples of different transfer types.
Figure 6-4 Transfer type examples
In Figure 6-4:
• The first transfer is the start of a burst and is therefore nonsequential.
• The master performs the second transfer of the burst immediately.
• The master performs the third transfer of the burst immediately, but this time the
slave is unable to complete and uses HREADY to insert a single wait state.
• The final transfer of the burst completes with zero wait states.
NONSEQ SEQ SEQ
0x20 0x24 0x28 0x2C
Data
0x280x20
Data
0x24
SEQ
Data Data
0x2C
INCR
Data
0x280x20
Data
0x24
Data Data
0x2C
HCLK
HTRANS[1:0]
HWDATA[31:0]
HBURST[2:0]
HADDR[31:0]
HRDATA[31:0]
HREADY