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Chapter 7
DMA Functions (DMA Controller)
Preliminary User’s Manual U15839EE1V0UM00
7.2.2 DMA destination address registers H0 to H3 (DDAH0 to DDAH3)
These registers are used to set the DMA destination address (28 bits each) for DMA channel n
(n = 0 to 3). They are divided into two 16-bit registers, DDAHn and DDALn.
Since these registers are configured as 2-stage FIFO buffer registers, a new destination address for
DMA transfer can be specified during DMA transfer (refer to 7.3 Next Address Setting Function).
(1)
DMA destination address registers DDAH0 to DDAH3 (DDAH0 to DDAH3)
These registers can be read/written in 16-bit units.
Caution:
When setting an address of a peripheral I/O register for the destination address, be
sure to specify an address between FFFF000H and FFFFFFFH. An address of the
peripheral I/O register image (3FFF000H to 3FFFFFFH) must not be specified.
Figure 7-3:
DMA Destination Address Registers 0H to 3H (DDA0H to DDA3H)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
Initial
value
DDAH0
IR
0
0
0
DA27 DA26 DA25 DA24 DA23 DA22 DA21 DA20 DA19 DA18 DA17 DA16 FFFFF086H undef.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
Initial
value
DDAH1
IR
0
0
0
DA27 DA26 DA25 DA24 DA23 DA22 DA21 DA20 DA19 DA18 DA17 DA16 FFFFF08EH undef.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
Initial
value
DDAH2
IR
0
0
0
DA27 DA26 DA25 DA24 DA23 DA22 DA21 DA20 DA19 DA18 DA17 DA16 FFFFF096H undef.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
Initial
value
DDAH3
IR
0
0
0
DA27 DA26 DA25 DA24 DA23 DA22 DA21 DA20 DA19 DA18 DA17 DA16 FFFFF09EH undef.
Bit Position
Bit Name
Function
15
IR
Specifies the DMA destination address.
0: External memory or On-chip peripheral I/O
1: Internal RAM
11 to 0
DA27 to
DA16
Sets the DMA destination addresses (A27 to A16). During DMA transfer, it stores the
next DMA transfer destination address.
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