HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 323

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

(High active)
(RD output)
(High active)
(High active)
(RD output)
Bus cycle
Figure 9.20 Cycle-Steal Mode, Level input (CPU Access: 2 Cycles, DREQ Input Delayed)
Bus cycle
Bus cycle
DRAK
DACK
CKIO
,4-3
DRAK
DACK
DRAK
DACK
CKIO
CKIO
Note: When a
1st sampling
1st sampling
1st sampling
CPU
CPU
CPU
Figure 9.21 Cycle-Steal Mode, Edge input (CPU Access: 2 Cycles)
,4-3
2nd sampling is performed,
but since
per-cycle sampling starts
2nd sampling
2nd sampling is performed,
but since there is no
per-cycle sampling starts
DMAC(Read)
falling edge is detected,
DMAC(Read)
DMAC(Read)
High
Figure 9.22 Burst Mode, Level Input
2nd sampling
is high,
High
,4-3
DMAC(Write)
falling edge,
DMAC(Write)
2nd sampling
,4-3
DMAC(Write)
must be high for at least one cycle before the sampling point.
3rd sampling is performed,
but since
per-cycle sampling starts
3rd sampling is performed,
but since there is no
per-cycle sampling starts
CPU
CPU
3rd sampling
is high,
DMAC(Read)
,4-3
Rev. 4.00, 03/04, page 277 of 660
falling edge,
DMAC(Read)
DMAC(Read)
High
3rd sampling
High
DMAC(Write)
DMAC(Write)
DMAC(Write)
3rd sampling
DMAC(Read)
CPU
CPU