Datasheet

Section 8 DMA Controller (DMAC)
(This function is not available in the H8S/2695)
Page 248 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
• Module stop mode can be set
⎯ The initial setting enables DMAC registers to be accessed. DMAC operation is halted by
setting module stop mode
8.1.2 Block Diagram
A block diagram of the DMAC is shown in figure 8.1.
Internal address bus
Address buffer
Processor
Internal interrupts
TGI0A
TGI1A
TGI2A
TGI3A
TGI4A
TGI5A
TXI0
RXI0
TXI1
RXI1
ADI
External pins
DREQ0
DREQ1
TEND0
TEND1
DACK0
DACK1
Interrupt signals
DEND0A
DEND0B
DEND1A
DEND1B
Control logic
DMAWER
DMACR1B
DMACR1A
DMACR0B
DMACR0A
DMATCR
DMABCR
Data buffer
Internal data bus
MAR0A
IOAR0A
ETCR0A
MAR0B
IOAR0B
ETCR0B
MAR1A
IOAR1A
ETCR1A
MAR1B
IOAR1B
ETCR1B
Legend:
DMA write enable register
DMA terminal control register
DMA band control register (for all channels)
DMA control register
Memory address register
I/O address register
Executive transfer counter register
Channel 0Channel 1
Channel 0AChannel 0BChannel 1AChannel 1B
Module data bus
DMAWER:
DMATCR:
DMABCR:
DMACR:
MAR:
IOAR:
ETCR:
Figure 8.1 Block Diagram of DMAC