HD6417750RF240DV Datasheet, PDF (634/1132 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7750 Series

Section 14 Direct Memory Access Controller (DMAC)
SH7750, SH7750S, SH7750R Group
Relationship between DMA Transfer Type, Request Mode, and Bus Mode
Table 14.7 shows the relationship between the type of DMA transfer, the request mode, and the
bus mode.
Table 14.7 Relationship between DMA Transfer Type, Request Mode, and Bus Mode
Address
Mode
Type of Transfer
Request Bus Transfer Size Usable
Mode
Mode (Bits)
Channels
Single
Dual
External device with DACK
and external memory
External device with DACK
and memory-mapped
external device
External memory and
external memory
External memory and
memory-mapped external
device
External B/C
External B/C
Internal^*1 B/C
External^*7
Internal^*1 B/C
External^*7
8/16/32/64/32B 0, 1 (2, 3)^*6
8/16/32/64/32B 0, 1 (2, 3)^*6
8/16/32/64/32B 0 to 3^{*5 *6}
8/16/32/64/32B 0 to 3^{*5 *6}
Memory-mapped external
device and memory-mapped
external device
External memory and
on-chip peripheral module
Memory-mapped external
device and on-chip
peripheral module
Internal^*1
External^*7
Internal^*2
Internal^*2
B/C
B/C^*3
B/C^*3
8/16/32/64/32B 0 to 3^{*5 *6}
8/16/32/64^*4 0 to 3^{*5 *6}
8/16/32/64^*4 0 to 3^{*5 *6}
Legend:
32B: 32-byte burst transfer
B:
Burst
C:
Cycle steal
External: External request
Internal: Auto-request or on-chip peripheral module request
Notes: 1. External request, auto-request, or on-chip peripheral module request (TMU input
capture interrupt request) possible. In the case of an on-chip peripheral module request,
it is not possible to specify external memory data transfer with the SCI (SCIF) as the
transfer request source.
2. Auto-request, or on-chip peripheral module request possible. If the transfer request
source is the SCI (SCIF), either the transfer source must be SCRDR1 (SCFRDR2) or
the transfer destination must be SCTDR1 (SCFTDR2).
3. When the transfer request source is the SCI (SCIF), only cycle steal mode can be used.
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R01UH0456EJ0702 Rev. 7.02
Sep 24, 2013