upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 512

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

Remark:
Please refer to 15.5 on page 522 and Table 15-3 on page 524 for details on and a comparison of the
transfer modes.
512
Source address: DMSAn register
Source object: TS1 & 0 bit
Source address count: SAD bit
Source address: DMDAn register
Source object: TD1 & 0 bit
Source address count: DAD bit
TDIR bit = 1
TDIR bit = 0
DAD
DS1
TM1
0
0
1
1
0
0
1
1
0
1
If address incrementation is selected for the source address and/or the destination address,
the address is incremented based on the DMA transfer size. For 8-bit size, the address is
incremented by 1, for 16-bit by 2, and for 32-bit by 4.
Figure 15-8: DMA Addressing Control Register (DMADCn) Format (2/2)
TDIR
0
1
Destination address is incremented after each transfer.
Destination address is fixed
DS0
TM0
0
1
0
1
0
1
0
1
Figure 15-9: Effect of TDIR Flag on DMA Transfer
Chapter 15 DMA Functions (DMA Controller)
Transfer from source → destination
Transfer from destination → source
Byte (8-bit)
Half word (16-bit)
Word (32-bit)
Setting prohibited
Single transfer mode (starting value)
Fixed Channel transfer mode
Setting prohibited
Block transfer mode
Destination Address Count Mode (DA[25:0] bits)
User’s Manual U16702EE3V2UD00
DMA transfer
DMA transfer
Selected DMA Transfer Mode
Selected DMA Transfer Size
DMA Transfer Direction
Destination address: DMDAn register
Destination object: TD1 & 0 bit
Destination address count: DAD bit
Destination address: DMSAn register
Destination object: TS1 & 0 bit
Destination address count: SAD bit