H8SXSLASH1663M datasheet(495/1504 Pages) RENESAS

495 / 1504 page

Section 11 EXDMA Controller (EXDMAC)

Rev. 2.00 Sep. 24, 2008 Page 463 of 1468

REJ09B0412-0200

11.3.5

EXDMA Block Size Register (EDBSR)

EDBSR sets the repeat size, block size, or cluster size. EDBSR is enabled in repeat transfer, block

transfer, and cluster transfer modes. EDBSR is disabled in normal transfer mode.

When BKSZH and BKSZ are set to H'0001 in cluster transfer mode (dual address mode), the

EXDMAC operates in block transfer mode (dual address mode).

BKSZH31

R/W

BKSZH30

R/W

BKSZH29

R/W

BKSZH28

R/W

BKSZH27

R/W

BKSZH24

R/W

BKSZH26

R/W

BKSZH25

R/W

Bit

Bit Name

Initial Value

R/W

BKSZH23

R/W

BKSZH22

R/W

BKSZH21

R/W

BKSZH20

R/W

BKSZH19

R/W

BKSZH16

R/W

BKSZH18

R/W

BKSZH17

R/W

Bit

Bit Name

Initial Value

R/W

BKSZ15

R/W

BKSZ14

R/W

BKSZ13

R/W

BKSZ12

R/W

BKSZ11

R/W

BKSZ8

R/W

BKSZ10

R/W

BKSZ9

R/W

Bit

Bit Name

Initial Value

R/W

BKSZ7

R/W

BKSZ6

R/W

BKSZ5

R/W

BKSZ4

R/W

BKSZ3

R/W

BKSZ0

R/W

BKSZ2

R/W

BKSZ1

R/W

Bit

Bit Name

Initial Value

R/W

Bit

Bit Name

Initial

value

R/W

Description

31 to 16

BKSZH31

BKSZH16

All 0

R/W

Sets the repeat size, block size, or cluster size.

When these bits are set to H'0001, one byte-, one

word-, or one longword-size is set. When these bits are

set to H'0000, the maximum values are set (see table

11.2). These bits are always fixed during an EXDMA

operation.

15 to 0

BKSZ15 to

BKSZ0

All 0

R/W

In an EXDMA operation, the remaining repeat size,

block size, or cluster size is indicated. The value is

decremented by one each time of a data transfer. When

the remaining size becomes zero, the BKSZH value is

loaded. Set the same initial value as for the BKSZH bit

when writing.

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