HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 290

• Manufacturer Part Number: HD6412332
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

ETCRAL is decremented by 1 each time a byte or word transfer is performed. In response to a
single transfer request, burst transfer is performed until the value in ETCRAL reaches H'00.
ETCRAL is then loaded with the value in ETCRAH. At this time, the value in the MAR register
for which a block designation has been given by the BLKDIR bit in DMACRA is restored in
accordance with the DTSZ, SAID/DAID, and SAIDE/DAIDE bits in DMACR.
Rev.4.00 Sep. 07, 2007 Page 260 of 1210
REJ09B0245-0400
Address T
Address B
Legend:
Address
Address
Address
Address
Where :
A
A
T
T
B
B
L
L
N
M
A
B
A
B
A
B
= L
= L
= L
= L
= Value set in MARA
= Value set in MARB
= Value set in ETCRB
= Value set in ETCRAH and ETCRAL
Figure 7.14 Operation in Block Transfer Mode (BLKDIR = 1)
A
B
A
B
+ SAIDE · (–1)
+ DAIDE · (–1)
Block area
SAID
DAID
· (2
· (2
DTSZ
DTSZ
Consecutive transfer
of M bytes or words
is performed in
response to one
request
· (N–1))
· (M·N–1))
Transfer
2nd block
1st block
Nth block
Address T
Address B
B
B