SH7050 Datasheet, PDF (188/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 9 Direct Memory Access Controller (DMAC)
9.3.8 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 Bus^*6 Transfer Usable
Mode
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 memory and external memory
External memory and memory-mapped
external device
Memory-mapped external device and
memory-mapped external device
External memory and on-chip memory
External memory and on-chip
peripheral module
Memory-mapped external device and
on-chip memory
Memory-mapped external device and
on-chip peripheral module
On-chip memory and on-chip memory
On-chip memory and on-chip
peripheral module
On-chip peripheral module and on-
chip peripheral module
External
Any^*1
Any^*1
Any^*1
Any^*1
Any^*2
Any^*1
Any^*2
Any^*1
Any^*2
Any^*2
B/C
B/C
B/C
B/C
B/C
B/C^*3
B/C
B/C^*3
B/C
B/C^*3
B/C^*3
8/16/32 0, 1
8/16/32
8/16/32
0–3^*5
0–3^*5
8/16/32
0–3^*5
8/16/32
8/16/32^*4
0–3^*5
0–3^*5
8/16/32
0–3^*5
8/16/32^*4 0–3^*5
8/16/32
8/16/32^*4
0–3^*5
0–3^*5
8/16/32^*4 0–3^*5
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. When the transfer request is an external request, channels 0 and 1 only can be used.
6. B: Burst, C: Cycle steal
Rev. 5.00 Jan 06, 2006 page 168 of 818
REJ09B0273-0500