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SH7014 Datasheet, PDF (205/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer
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9. Direct Memory Access Controller (DMAC)
Relationship between Request Modes and Bus Modes by DMA Transfer Category
Table 9.6 shows the relationship between request modes and bus modes by DMA transfer
category.
Table 9.6 Relationship of Request Modes and Bus Modes by DMA Transfer Category
Address
Mode Transfer Category
Request
Mode
Bus*5 Transfer Usable
Mode Size (Bits) Channels
Single External device with DACK and
external memory
External
B/C 8/16/32 0,1
Dual
External device with DACK and
memory-mapped external device
External
External memory and external memory Any*1
External memory and memory-mapped Any*1
external device
Memory-mapped external device and Any*1
memory-mapped external device
External memory and on-chip memory Any*1
External memory and on-chip
peripheral module
Any*2
Memory-mapped external device and Any*1
on-chip memory
Memory-mapped external device and Any*2
on-chip peripheral module
On-chip memory and on-chip memory Any*1
On-chip memory and on-chip
peripheral module
Any*2
On-chip peripheral module and on-
chip peripheral module
Any*2
B/C 8/16/32 0, 1
B/C 8/16/32 0, 1
B/C 8/16/32 0, 1
B/C 8/16/32 0, 1
B/C 8/16/32 0, 1
B/C*3 8/16/32*4 0, 1
B/C 8/16/32 0, 1
B/C*3 8/16/32*4 0, 1
B/C 8/16/32 0, 1
B/C*3 8/16/32*4 0, 1*1
B/C*3 8/16/32*4 0, 1
Notes: 1. External request, auto-request or on-chip peripheral module request enabled. However,
in the case of on-chip peripheral module request, it is not possible to specify the SCI or
A/D converter for the transfer request source.
2. External request, auto-request or on-chip peripheral module request possible. However,
if transfer request source is also the SCI or A/D converter, the transfer source or
transfer destination must be the SCI or A/D converter.
3. When the transfer request source is the SCI, only cycle steal mode is possible.
4. Access size permitted by register of on-chip peripheral module that is the transfer
source or transfer destination.
5. B: Burst, C: Cycle steal
Rev.5.00 Sep. 27, 2007 Page 171 of 716
REJ09B0398-0500
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