SH7727 Datasheet, PDF (488/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 14 Direct Memory Access Controller (DMAC)
Table 14.6 Relationship of Request Modes and Bus Modes
Address
Mode Transfer Areas
Request Bus
Mode
Mode
Transfer
Size (bits)
Usable
Channels
Dual
External device with DACK and
external memory
External B/C
8/16/32/128 0
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
supporting module
Memory-mapped external device and
on-chip supporting module
On-chip supporting module and on-
chip supporting module
External
All^*1
All^*1
All^*1
All^*2
All^*2
All^*2
B/C
B/C
B/C
B/C
B/C^*3
B/C^*3
B/C^*3
8/16/32/128 0
8/16/32/128 0–3^*5
8/16/32/128 0–3^*5
8/16/32/128 0–3^*5
8/16/32^*4
0–3^*5
8/16/32^*4
0–3^*5
8/16/32^*4
0–3^*5
X/Y memory and X/Y memory
X/Y memory and memory-mapped
external device
X/Y memory and on-chip supporting
module
All
All^*1
All^*2
B/C
B/C
B/C^*3
8/16/32/128 0–3
8/16/32/128 0–3
8/16/32
0–3
X/Y memory and external memory All
B/C
8/16/32/128 0–3
Single
External device with DACK and
external memory
External B/C
8/16/32/128 0
External device with DACK and
memory-mapped external device
External B/C
8/16/32/128 0
B: Burst
C: Cycle steal
Notes: 1. External requests, auto requests and on-chip supporting module (CMT) requests are all
available.
2. External requests, auto requests and on-chip supporting module requests are all
available. When the SIOF, USBF, SCIF, or A/D converter is the transfer request source,
the transfer destination or transfer source must be also the SIOF, USBF, SCIF, or A/D
converter, respectively.
3. The SIOF, USBF, SCIF, or A/D converter can be specified for the transfer request
source in the cycle-steal mode only.
4. The access size permitted when the transfer destination or source is an on-chip
supporting module register.
5. If the transfer request is an external request, only channel 0 is available.
Rev. 5.00 Dec 12, 2005 page 416 of 1034
REJ09B0254-0500