H8SXSLASH1663R datasheet(508/1504 Pages) RENESAS

508 / 1504 page

Section 11 EXDMA Controller (EXDMAC)

Rev. 2.00 Sep. 24, 2008 Page 476 of 1468

REJ09B0412-0200

Bit

Bit Name

Initial

value

R/W

Description

SARIE

R/W

Source Address Extended Repeat Area Overflow

Interrupt Enable

Enables or disables the source address extended

repeat area overflow interrupt request.

When this bit is set to 1, in the event of source address

extended repeat area overflow, the DTE bit is cleared to

0 in EDMDR. At the same time, the ESIF bit is set to 1

in EDMDR to indicate that the source address extended

repeat area overflow interrupt is requested.

When used together with block transfer mode, an

interrupt is requested at the end of a block-size transfer.

If the DTE bit is set to 1 in EDMDR for the channel on

which transfer is terminated by an interrupt, transfer can

be resumed from the state in which it ended.

If a source address extended repeat area is not

designated, the specification by this bit is ignored.

0: Source address extended repeat area overflow

interrupt request disabled

1: Source address extended repeat area overflow

interrupt request enabled

14, 13



All 0

Reserved

They are always read as 0 and cannot be modified.

SARA4

SARA3

SARA2

SARA1

SARA0

R/W

Source Address Extended Repeat Area

These bits specify the source address (EDSAR)

extended repeat area. The extended repeat area

function updates the specified lower address bits,

leaving the remaining upper address bits always the

same. An extended repeat area size of 4 bytes to 128

Mbytes can be specified. The setting interval is a

power-of-two number of bytes.

When extended repeat area overflow results from

incrementing or decrementing an address, the lower

address is the start address of the extended repeat

area in the case of address incrementing, or the last

address of the extended repeat area in the case of

address decrementing.

If SARIE bit is set to 1, an interrupt can be requested

when an extended repeat area overflow occurs.

Table 11.3 shows the settings and ranges of the

extended repeat area.

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