Datasheet

Table Of Contents
Section 7 DMA Controller (DMAC)
REJ09B0140-0900 Rev. 9.00 Page 155 of 846
Sep 16, 2010
H8S/2215 Group
7.3.4 DMA Control Register (DMACR)
DMACR controls the operation of each DMAC channel.
Short Address Mode (common to DMACRA and DMACRB)
Bit Bit Name Initial Value R/W Description
7 DTSZ 0 R/W Data Transfer Size
Selects the size of data to be transferred at one time.
0: Byte-size transfer
1: Word-size transfer
6 DTID 0 R/W Data Transfer Increment/Decrement
Selects incrementing or decrementing of MAR every data
transfer in sequential mode or repeat mode.
In idle mode, MAR is neither incremented nor decremented.
0: MAR is incremented after a data transfer
When DTSZ = 0, MAR is incremented by 1 after a
transfer
When DTSZ = 1, MAR is incremented by 2 after a
transfer
1: MAR is decremented after a data transfer
When DTSZ = 0, MAR is decremented by 1 after a
transfer
When DTSZ = 1, MAR is decremented by 2 after a
transfer