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SH7641 Datasheet, PDF (489/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series
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Section 13 Direct Memory Access Controller (DMAC)
Table 13.9 Relationship of 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, 1
External device with DACK and memory-mapped External
external device
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 peripheral All*2
module
X/Y memory, U memory and X/Y memory,
All*1
U memory
X/Y memory, U memory and memory-mapped All*1
external device
X/Y memory, U memory and on-chip peripheral All*2
module
X/Y memory, U memory and external memory
All*1
B/C 8/16/32/128 0, 1
B/C 8/16/32/128 0 to 3*5
B/C 8/16/32/128 0 to 3*5
B/C 8/16/32/128 0 to 3*5
B/C*3 8/16/32/128*4 0 to 3*5
B/C*3 8/16/32/128*4 0 to 3*5
B/C*3 8/16/32/128*4 0 to 3*5
B/C 8/16/32/128 0 to 3*5
B/C 8/16/32/128 0 to 3*5
B/C*3 8/16/32/128*4 0 to 3*5
B/C 8/16/32/128 0 to 3*5
Single External device with DACK and external memory External B/C 8/16/32/128 0, 1
External device with DACK and memory-mapped External B/C 8/16/32/128 0, 1
external device
[Legend]
B: Burst
C: Cycle steal
Notes: 1. External requests, auto requests, and on-chip peripheral module requests are all
available. In the case of on-chip peripheral module requests, however, CMT0, CMT1,
and MTU0 to MTU4 are only available.
2. External requests, auto requests, and on-chip peripheral module requests are all
available. However, for on-chip peripheral module requests, the module must be
designated as the transfer request source or the transfer destination except CMT0,
CMT1, and MTU0 to MTU4.
3. For on-chip peripheral module requests, the transfer source is in cycle steal mode
except CMT0, CMT1, and MTU0 to MTU4.
4. Access size permitted for the on-chip peripheral module register functioning as the
transfer source or transfer destination.
5. If the transfer request is an external request, channels 0 to 1 are only available.
Rev. 4.00 Sep. 14, 2005 Page 439 of 982
REJ09B0023-0400
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