h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 238

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

φ pin
acceptance
internal
processing
state
Bus cycle
Rev. 2.00, 03/04, page 206 of 534
φ pin
Original
channel
Original
channel
Bus cycle
Other
channel
Other
channel
(Contention with Another Channel/Dual Address Mode/Low Level Sensing)
DMA transfer
Figure 7.40 External Request/Cycle Steal Mode/Normal Transfer Mode
Figure 7.41 External Request/Cycle Steal Mode/Normal Transfer Mode
cycle
(No Contention/Single Address Mode/Falling Edge Sensing)
Bus release
Edge confirmation
Start of transfer
processing
Bus release
3 cycles
Start of high
level sensing
transfer cycle
DMA single
DMA
read
Edge confirmation
Start of transfer
processing
Bus release
DMA
write
1 cycle
Bus
release
Start of high
level sensing
transfer cycle
DMA single
Other channel
transfer cycle
Edge confirmation
Start of transfer
processing
Bus release
1 cycle
Bus
release
DMA
read
Start of high
level sensing
transfer cycle
DMA single
DMA
write