Rev. 1.0, 09/01, page 290 of 904
Figure 7.15 shows the operation flow in block transfer mode.
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 7.15 Operation Flow in Block Transfer Mode
Содержание H8S/2376 F-ZTAT
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