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SH7080_09 Datasheet, PDF (473/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family
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Section 10 Direct Memory Access Controller (DMAC)
Relationship between Request Modes and Bus Modes by DMA Transfer Category: Table
10.8 shows the relationship between request modes and bus modes by DMA transfer category.
Table 10.8 Relationship between Request Modes and Bus Modes by DMA Transfer
Category
Address
Mode Transfer Category
Request Bus Transfer
Mode
Mode Size (Bits)
Usable
Channels
Dual
External device with DACK and external memory External B/C 8/16/32/128 0 to 3
External device with DACK and memory-
mapped external device
External
External memory and external memory
All*1
External memory and memory-mapped external All*1
device
Memory-mapped external device and memory- All*1
mapped external device
External memory and on-chip peripheral module All*2
Memory-mapped external device and
All*2
on-chip peripheral module
On-chip peripheral module and on-chip
All*2
peripheral module
On-chip memory and On-chip memory
All*1
On-chip memory and memory-mapped external All*1
device
On-chip memory and on-chip peripheral module All*2
On-chip memory and external memory
All*1
B/C 8/16/32/128 0 to 3
B/C 8/16/32/128 0 to 3
B/C 8/16/32/128 0 to 3
B/C 8/16/32/128 0 to 3
B/C*3 8/16/32/128*4 0 to 3
B/C*3 8/16/32/128*4 0 to 3
B/C*3 8/16/32/128*4 0 to 3
B/C 8/16/32/128 0 to 3
B/C 8/16/32/128 0 to 3
B/C*3 8/16/32/128*4 0 to 3
B/C 8/16/32/128 0 to 3
Single External device with DACK and external memory External B/C 8/16/32
0 to 3
External device with DACK and memory-
mapped external device
External B/C 8/16/32
0 to 3
B: Burst mode, C: Cycle steal mode
Notes: 1. External requests, auto requests, and on-chip peripheral module requests are all
available. For on-chip peripheral module requests, however, the SCI and A/D converter
cannot be specified as the transfer request source.
2. External requests, auto requests, and on-chip peripheral module requests are all
available. However, when the SCI or A/D converter is the transfer request source, the
request source register must be designated as the transfer source or the transfer
destination.
3. Only cycle steal when the SCI or A/D converter is the transfer request source.
4. Access size permitted for the on-chip peripheral module register functioning as the
transfer source or transfer destination.
Rev. 4.00 Dec. 15, 2009 Page 413 of 1558
REJ09B0181-0400
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