RX610 Group
12. DMA Controller (DMAC)
R01UH0032EJ0120 Rev.1.20
Page 307 of 1006
Feb 20, 2013
12.2.2
DMA Control Register A (DMCRA)
Addresses: DMAC0.DMCRA 0008 2400h, DMAC1.DMCRA 0008 2408h
DMAC2.DMCRA 0008 2410h, DMAC3.DMCRA 0008 2418h
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BRLOD SRLOD DRLOD
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b20
b31
b24
b23
b19
b18
b17
b16
b30
b29
b28
b27
b26
b25
b22
b21
b4
b15
b8
b7
b3
b2
b1
b0
b14
b13
b12
b11
b10
b9
b6
b5
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DSEL[1:0]
DCTG[5:0]
Bit
Symbol
Bit Name
Description
R/W
b5 to b0
DCTG[5:0]
DMA Activation Source Select
Select a DMA activation source. (See table 12.4.)
R/W
b7, b6
Reserved
These bits are always read as 0. The write value should always
be 0.
R/W
b8
DRLOD
Transfer Destination Address
Reload Function Select
0: Transfer destination address reload function is not used
1: Transfer destination address reload function is used
R/W
b9
SRLOD
Transfer Source Address
Reload Function Select
0: Transfer source address reload function is not used
1: Transfer source address reload function is used
R/W
b10
BRLOD
Transfer Byte Count Reload
Function Select
0: Transfer byte count reload function is not used
1: Transfer byte count reload function is used
R/W
b23 to b11
Reserved
These bits are always read as 0. The write value should always
be 0.
R/W
b25, b24
DSEL[1:0]
Transfer System Select
b25 b24
0
0: Single-operand transfer
0
1: Consecutive-operand transfer
1
0: Setting prohibited
1
1: Nonstop transfer
R/W
b31 to b26
Reserved
These bits are always read as 0. The write value should always
be 0.
R/W
DMCRA is used to control DMAC functions.
DCTG[5:0] Bits (DMA Activation Source Select)
The DCTG[5:0] bits select a DMA activation source.
Do not set these bits during data transfer, but set them while the DMAC is not active or DMA transfer is disabled. After
these bits are set, be sure to set the DREQ bit in DMCRD of DMACm to 0 (no DMA transfer request) and then activate
the DMAC and enable DMA transfer.
Table 12.4 shows the setting of the DCTG[5:0] bits.
Summary of Contents for RX600 Series
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