M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 438

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

DMAC
Figure 2.9.7. Set-up procedure of repeated transfer mode
Setting DMAi transfer counter
(b15)
(b23)
(b23)
Setting DMAi source pointer
Setting DMAi destination pointer
Setting DMAi request cause select register
b7
b7
b7
b0
b7
b7
Setting DMAi control register
Setting DMAi control register
0
When software DMA request bit = “1”
1 0
(b19)
(b19)
0
1
0
b3
b3
0
0
0 1
1 0
(b16)
(b16)
(b8)
b0
b0
b0
b0
b0
b0 b7
(b15)
(b15)
Software DMA request bit
DMA enable bit
DMA request cause select bit
Transfer unit bit select bit
Repeat transfer mode select bit
DMA request bit
Destination address direction select bit
b7
b7
Source address direction select bit
DMA enable bit
b3 b2 b1 b0
0 0 0 1 : Software trigger
Set to “0”
0
1 : Repeat transfer
1 : Enabled
0 : DMA not requested
0 : Disabled
DMAi request cause select register (i = 0, 1) [Address 03B8
DMiSL(i = 0, 1)
DMAi control register (i = 0, 1) [Address 002C
DMiCON(i = 0, 1)
DMAi control register (i = 0, 1) [Address 002C
DMiCON(i = 0, 1)
0 : Fixed (Bit 4 and bit 5 cannot be set to “1” simultaneously)
1 : Forward (Bit 4 and bit 5 cannot be set to “1” simultaneously)
: 16 bits
Start DMA transmission
DMA0 source pointer [Address 0022
DMA1 source pointer [Address 0032
DMA0 destination pointer [Address 0026
DMA1 destination pointer [Address 0036
(b8)
(b8)
b0
b0
b0
Note: Clear DMA request bit simultaneously again.
b7
b7
Transfer counter
DMA0 transfer counter [Address 0029
DMA1 transfer counter [Address 0039
Set a value one less than the transfer count
Destination pointer
Source pointer
Stores the source address
Stores the destination address
16
16
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
, 003C
, 003C
b0
b0
16
16
16
16
to 0020
to 0030
]
]
16
16
16
to 0024
to 0034
, 03BA
16
16
] SAR0
] SAR1
16
16
, 0028
, 0038
16
16
16
]
] DAR0
] DAR1
Mitsubishi microcomputers
M16C / 62 Group
16
16
] TCR0
] TCR1
423