HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 301

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 7.11 illustrates operation in normal mode.
Transfer requests (activation sources) are external requests and auto-requests.
With auto-request, the DMAC is only activated by register setting, and the specified number of
transfers are performed automatically. With auto-request, cycle steal mode or burst mode can be
selected. In cycle steal mode, the bus is released to another bus master each time a transfer is
performed. In burst mode, the bus is held continuously until transfer ends.
Address T
Address B
Legend:
Address
Address
Address
Address
Where :
T
T
B
B
L
L
N
A
A
A
B
A
B
A
B
= L
= L
= L
= L
= Value set in MARA
= Value set in MARB
= Value set in ETCRA
A
B
A
B
+ SAIDE · (–1)
+ DAIDE · (–1)
Figure 7.11 Operation in Normal Mode
SAID
DAID
· (2
· (2
DTSZ
DTSZ
Section 7 DMA Controller (Not Supported in the H8S/2321)
· (N–1))
· (N–1))
Transfer
Rev.6.00 Sep. 27, 2007 Page 271 of 1268
REJ09B0220-0600
Address T
Address B
B
B