Datasheet

Section 7 DMA Controller (DMAC)
R01UH0309EJ0500 Rev. 5.00 Page 339 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
• DMABCRL
Bit Bit Name Initial Value R/W Description
7
6
5
4
DTE1B
DTE1A
DTE0B
DTE0A
0
0
0
0
R/W
R/W
R/W
R/W
Data Transfer Enable 1B
Data Transfer Enable 1A
Data Transfer Enable 0B
Data Transfer Enable 0A
If the DTE bit is cleared to 0 when DTIE = 1, the
DMAC regards this as indicating the end of a
transfer, and issues a transfer end interrupt
request to the CPU or DTC.
When DTE = 0, data transfer is disabled and the
DMAC ignores the activation source selected by
the DTF3 to DTF0 bits in DMACR.
When DTE = 1, data transfer is enabled and the
DMAC waits for a request by the activation source
selected by the DTF3 to DTF0 bits in DMACR.
When a request is issued by the activation source,
DMA transfer is executed.
[Clearing conditions]
• When initialization is performed
• When the specified number of transfers have
been completed in a transfer mode other than
repeat mode
• When 0 is written to the DTE bit to forcibly
suspend the transfer, or for a similar reason
[Setting condition]
When 1 is written to the DTE bit after reading DTE
= 0