7721 datasheet(457/577 Pages) RENESAS

457 / 577 page

APPLICATION

7721 Group User’s Manual

16–54

16.2 Examples of using DMA controller

! 0

011100

b23

b16 b15

b8 b7

b23

b16 b15

b8 b7

0016

0E16

010

b23

b16 b15

b8 b7

0016

1016

DMA3 mode register L (Address 1FFC16)

Transfer unit : 16 bits

2-bus cycle transfer

Cycle-steal transfer mode

Transfer source address direction : Forward

Transfer destination address direction : Fixed

DMA3 mode register H (Address 1FFD16)

No transfer source Wait

No transfer destination Wait

Repeat transfer mode

Source address register 3 (Addresses 1FF216 to 1FF016)

Data buffer’s start address

Port P6, P7 register’s address

Destination address register 3 (Addresses 1FF616 to 1FF416)

Transfer counter register 3 (Addresses 1FFA16 to 1FF816)

Data number (unit : byte)

DMA3 control register (Address 1FFE16)

DMA request source : Timer B0

DMAACK3 pin : Invalid

DMA3 interrupt control register (Address 6F16)

Interrupt disabled

! : It may be “0” or “1.”

Fig. 16.2.12 Initial setting example for relevant register (1)

7721 Datasheet(PDF) 457 Page - Renesas Technology Corp

7721 Datasheet(HTML) 457 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL