HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 245

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Note: With cycle steal and single address operation, sampling timing is the same regardless of
DREQ
DREQ
DREQ
DRAK
DACK
DRAK
DACK
DRAK
DACK
cycle
cycle
cycle
Bus
Bus
Bus
CK
CK
CK
Figure 10.20 Burst Mode, Single Address and Level Detection (Fastest Operation)
Figure 10.19 Burst Mode, Dual Address and Level Detection (Normal Operation)
Figure 10.18 Burst Mode, Dual Address and Level Detection (Fastest Operation)
CPU(1)
whether DREQ detection is by level or by edge.
CPU
CPU
1st sampling
CPU(2)
CPU
CPU
CPU(3) Dummy
CPU
2nd sampling
CPU
DMAC(R) DMAC(W)
DMAC(R)
DMAC
3rd sampling
DMAC(R)
DMAC(W)
10. Direct Memory Access Controller (DMAC)
DMAC(W)
Rev.4.00 Mar. 27, 2008 Page 201 of 882
DMAC
DMAC(R)
DMAC(R)
4th sampling
DMAC(W)
DMAC(W)
DMAC
REJ09B0108-0400
CPU
DMAC(R)
CPU(4)
DMAC(R)
Dummy