Renesas H8S/2633 Series Hardware Manual page 350

Figure 8-15 Operation Flow in Block Transfer Mode
Transfer requests (activation sources) consist of A/D converter conversion end interrupts, external
requests, SCI transmission complete and reception complete interrupts, and TPU channels 0 to 5
compare match/input capture A interrupts.
296
Start
(DTE = DTME = 1)
Transfer request?
Acquire bus
Read address specified by MARA
MARA=MARA+SAIDE·(–1)
Write to address specified by MARB
MARB=MARB+DAIDE·(–1)
ETCRAL=ETCRAL–1
ETCRAL=H'00
Release bus
ETCRAL=ETCRAH
BLKDIR=0
MARB=MARB–DAIDE·(–1)
MARA=MARA–SAIDE·(–1)
ETCRB=ETCRB–1
No
ETCRB=H'0000
Clear DTE bit to 0
to end transfer
No
Yes
SAID DTSZ
·2
DAID DTSZ
·2
No
Yes
No
Yes
DAID DTSZ
·2 ·ETCRAH
SAID DTSZ
·2 ·ETCRAH
Yes