h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 235

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

Figures 7.35 to 7.37 show operation timing examples for various conditions.
• CPU cycles/dual address mode (see figure 7.35)
• CPU cycles/single address mode (see figure 7.36)
• Contention with another channel/dual address mode (see figure 7.37)
φ pin
Bus cycle
CPU
operation
DA bit
φ pin
Bus cycle
CPU
operation
CPU cycle CPU cycle
CPU cycle CPU cycle
1
access
access
CPU
CPU
Figure 7.35 Auto Request/Burst Mode/Normal Transfer Mode
Figure 7.36 Auto Request/Burst Mode/Normal Transfer Mode
access
access
CPU
CPU
single cycle
CPU access
CPU access
DMA
read
DMA
(CPU Cycles/Single Address Mode)
(CPU Cycles/Dual Address Mode)
single cycle
DMA
write
DMA
1 bus cycle
CPU cycle
DMA
read
single cycle
DMA
DMA
write
CPU access
single cycle
Repeated
Rev. 2.00, 03/04, page 203 of 534
DMA
CPU cycle
Last transfer cycle
DMA
read
Last transfer cycle
single cycle
DMA
write
DMA
CPU cycle
CPU cycle
access
0
CPU