Figure 7.15 Example Of Extended Repeat Area Operation; Figure 7.16 Example Of Extended Repeat Area Function In Block Transfer Mode - Renesas H8SX/1520 Series Hardware Manual

32-bit cisc microcomputer

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When an interrupt by an extended repeat area overflow is used in block transfer mode, the

following should be taken into consideration.

When a transfer is stopped by an interrupt by an extended repeat area overflow, the address

the extended repeat area boundary. When an overflow on the extended repeat area occurs during a

transfer of one block, the interrupt by the overflow is suspended and the transfer overruns.

Figure 7.16 shows examples when the extended repeat area function is used in block transfer

When the are represented by the lower three bits (eight bytes) of DSAR are specified as the extended

repeat area (SARA4 to SARA0 = 3) and the block size in block transfer mode is specified to 5 (bits 23

to 16 in DTCR = 5).

External memory

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When the area represented by the lower three bits of DSAR (eight bytes)

is specified as the extended repeat area (SARA4 to SARA0 = B'00011)

External memory

Area specified

Figure 7.15 Example of Extended Repeat Area Operation

Area specified

An interrupt request by extended repeat area

overflow can be generated.

Rev. 3.00 Mar. 14, 2006 Page 171 of 804

Section 7 DMA Controller (DMAC)

Block transfer

REJ09B0104-0300

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