HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 319

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

B: Burst, C: Cycle steal
Notes: 1. External requests, auto requests and on-chip peripheral module requests are all
Bus Mode and Channel Priority Order: When a given channel 1 is transferring in the burst
mode and there is a transfer request to a channel 0 with a higher priority, the transfer of channel 0
will begin immediately.
At this time, if the priority is set in the fixed mode (CH0 > CH1), the channel 1 transfer will
continue when the channel 0 transfer has completely finished, even if channel 0 is operating in the
cycle-steal mode or in the burst mode.
If the priority is set in the round-robin mode, channel 1 will begin operating again after channel 0
completes the transfer of one transfer unit, even if channel 0 is in the cycle-steal mode or in the
burst mode. The bus will then switch between the two in the order channel 1, channel 0, channel 1,
channel 0.
Address
Mode
Single
2. External requests, auto requests and on-chip peripheral module requests are all
3. If the transfer request source is the SCIF, the cycle-steal mode is only available.
4. The access size permitted when the transfer destination or source is an on-chip
5. If the transfer request is an external request, channels 0 and 1 are only available.
6. If the transfer request source is the SDRAM, the transfer size should be set smaller
Transfer Category
External device with DACK and
external memory
External device with DACK and
memory-mapped external device
available. For on-chip peripheral module requests, however, SCIF, and A/D converter
cannot be specified as the transfer request source.
available. When the SCIF, or A/D converter is also the transfer request source,
however, the transfer destination or transfer source must be the SCIF, or A/D
converter, respectively.
peripheral module register.
than the bus width.
Request
Mode
External
External
Bus
Mode
B/C
B/C
Rev. 4.00, 03/04, page 273 of 660
Transfer
Size (bits)
8/16/32/128 0, 1
8/16/32/128 0, 1
Usable
Channels