262
Acquire bus
ETCRAL=ETCRAL–1
Transfer request?
ETCRAL=H'00
Release bus
BLKDIR=0
ETCRAL=ETCRAH
ETCRB=ETCRB–1
ETCRB=H'0000
Start
(DTE = DTME = 1)
Read address specified by MARA
MARA=MARA+SAIDE·(–1)
SAID
·2
DTSZ
Write to address specified by MARB
MARB=MARB+DAIDE·(–1)
DAID
·2
DTSZ
MARB=MARB–DAIDE·(–1)
DAID
·2
DTSZ
·ETCRAH
MARA=MARA–SAIDE·(–1)
SAID
·2
DTSZ
·ETCRAH
No
Yes
No
Yes
No
Yes
No
Yes
Clear DTE bit to 0
to end transfer
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 channel 0 to 5
compare match/input capture A interrupts.
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...