Link Mode - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
9.6.3

Link Mode

In link mode, a descriptor stored in external memory is loaded as set values and a DMA transaction is executed using the
loaded values. The DMAC contains a Next Link address and a Current Link address for each channel, and these
addresses are used to set the descriptor address to be executed next and to indicate the descriptor address of the currently
executed DMA transaction, respectively.
DMAC
Current Register Set
Source Address
Destination Address
Transaction Byte
Link Address Registers
Next Link Address
Current Link Address
Channel Status
Channel Control
Channel Config
Figure 9.6 Link Mode Outline
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
External memory or on-chip memory space
0x00
0x04
0x08
Bus
0x0C
0x10
0x14
Link
0x18
0x1C
0x20
0x24
0x28
0x2C
0x30
0x34
0x38
0x3C
0x40
0x44
0x48
0x4C
0x50
0x54
0x58
0x5C
9. Direct Memory Access Controller
header
Source Address
Destination Address
Transaction Byte
Channel Config
Channel Interval
Channel Extension
Link Address(0x20)
Link
header
Source Address
Destination Address
Transaction Byte
Channel Config
Channel Interval
Channel Extension
Link Address(0x40)
Link
header
Source Address
Destination Address
Transaction Byte
Channel Config
Channel Interval
Channel Extension
Link Address(0x60)
( )
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