HD6412350 Hitachi, HD6412350 Datasheet - Page 264

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

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.
244
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
• (N–1))
• (N–1))
Transfer
Address T
Address B
B
B