DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 258

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

7.4.13
If the DTE bit for the channel currently operating is cleared to 0, the DMAC stops on completion
of the 1-byte or 1-word transfer in progress. DMAC operation resumes when the DTE bit is set to
1 again. In full address mode, the same applies to the DTME bit. Figure 7.22 shows the procedure
for forcibly terminating DMAC operation by software.
Rev.7.00 Dec. 24, 2008 Page 204 of 698
REJ09B0074-0700
Figure 7.21 Example of Procedure for Continuing Transfer on Channel Interrupted by
Figure 7.22 Example of Procedure for Forcibly Terminating DMAC Operation
Forced Termination of DMAC Operation
transfer on interrupted
Forced termination
Forced termination
Clear DTE bit to 0
Transfer continues
Set DTME bit to 1
Resumption of
of DMAC
DTME = 0
channel
DTE = 1
Yes
No
[1]
[1]
[2]
NMI Interrupt
[1] Clear the DTE bit in DMABCRL to 0.
If you want to prevent interrupt generation after
forced termination of DMAC operation, clear the
DTIE bit to 0 at the same time.
Transfer ends
[1]
[2]
Check that DTE = 1 and
DTME = 0 in DMABCRL
Write 1 to the DTME bit.