Figure 7.15 Operation Flow In Block Transfer Mode - Renesas H8S/2368 Series Hardware Manual

Figure 7.15 shows the operation flow in block transfer mode.

Figure 7.15 Operation Flow in Block Transfer Mode

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
Rev. 2.00, 05/03, page 247 of 820