HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 264

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 7 DMA Controller (Not Supported in the H8S/2321)
Bit 8—Data Transfer Acknowledge 0A (DTA0A): Enables or disables clearing, when DMA
transfer is performed, of the internal interrupt source selected by the channel 0A data transfer
factor setting.
Bit 8
DTA0A
0
1
Bits 7 to 4—Data Transfer Enable (DTE): When DTE = 0, data transfer is disabled and the
activation source selected by the data transfer factor setting is ignored. If the activation source is
an internal interrupt, an interrupt request is issued to the CPU or DTC. If the DTIE bit is set to 1
when DTE = 0, the DMAC regards this as indicating the end of a transfer, and issues a transfer
end interrupt request to the CPU or DTC.
The conditions for the DTE bit being cleared to 0 are as follows:
• When initialization is performed
• When the specified number of transfers have been completed in a transfer mode other than
• When 0 is written to the DTE bit to forcibly abort the transfer, or for a similar reason
When DTE = 1, data transfer is enabled and the DMAC waits for a request by the activation
source selected by the data transfer factor setting. When a request is issued by the activation
source, DMA transfer is executed.
The condition for the DTE bit being set to 1 is as follows:
•
Bit 7—Data Transfer Enable 1B (DTE1B): Enables or disables data transfer on channel 1B.
Bit 7
DTE1B
0
1
Rev.6.00 Sep. 27, 2007 Page 234 of 1268
REJ09B0220-0600
repeat mode
When 1 is written to the DTE bit after the DTE bit is read as 0
Description
Clearing of selected internal interrupt source at time of DMA transfer is disabled
Clearing of selected internal interrupt source at time of DMA transfer is enabled
Description
Data transfer disabled
Data transfer enabled
(Initial value)
(Initial value)