SH7055S Datasheet, PDF (219/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

10.3.7 Relationship between Request Modes and Bus Modes by DMA Transfer Category
Table 10.4 shows the relationship between request modes and bus modes by DMA transfer
category.
Table 10.4 Relationship between Request Modes and Bus Modes by DMA Transfer
Category
Address
Mode Transfer Category
Request
Mode
Bus*⁵ Transfer Usable
Mode Size (Bits) Channels
Dual External memory and external memory Any*¹
B/C 8/16/32 0–3
External memory and memory-mapped Any*¹
external device
B/C 8/16/32 0–3
Memory-mapped external device and Any*¹
memory-mapped external device
B/C 8/16/32 0–3
External memory and on-chip memory Any*¹
B/C 8/16/32 0–3
External memory and on-chip
peripheral module
Any*²
B/C*³ 8/16/32*⁴ 0–3
Memory-mapped external device and Any*¹
on-chip memory
B/C 8/16/32 0–3
Memory-mapped external device and Any*²
on-chip peripheral module
B/C*³ 8/16/32*⁴ 0–3
On-chip memory and on-chip memory Any*¹
B/C 8/16/32 0–3
On-chip memory and on-chip
peripheral module
Any*²
B/C*³ 8/16/32*⁴ 0–3
On-chip peripheral module and on-
chip†peripheral module
Any*²
B/C*³ 8/16/32*⁴ 0–3
B: Burst, C: Cycle-steal
Notes: *1 Auto-request or on-chip peripheral module request enabled. However, in the case of an
on-chip peripheral module request, it is not possible to specify the SCI, HCAN0, or A/D
converter for the transfer request source.
*2 Auto-request or on-chip peripheral module request possible. However, if the transfer
request source is also the SCI, HCAN0, or A/D converter, the transfer source or transfer
destination must be same as the transfer source.
*3 When the transfer request source is the SCI, only cycle-steal mode is possible.
*4 Access size permitted by the on-chip peripheral module register that is the transfer
source or transfer destination.
Rev.2.0, 07/03, page 181 of 960