Rev. 3.0, 10/02, page 142 of 686
A block diagram of the DMAC is shown in figure 7.1.
Internal address bus
Addres buffer
Processor
Internal interrupts
TGI0A
TGI1A
TGI2A
TXI0
RXI0
TXI1
RXI1
ADI
USB request signals
Interrupt signals
DEND0A
DEND0B
DEND1A
DEND1B
Control logic
DMAWER
DMACR1B
DMACR1A
DMACR0B
DMACR0A
DMATCR
DMABCR
Data buffer
Internal address bus
MAR0A
IOAR0A
ETCR0A
MAR0B
IOAR0B
ETCR0B
MAR1A
IOAR1A
ETCR1A
MAR1B
IOAR1B
ETCR1B
Legend
DMAWER
DMATCR
DMABCR
DMACR
MAR
IOAR
ETCR
: 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
Note:
*
Reserved register
Channel 0
Module data bus
Channel 0A
Channel 0B
Channel 1A
Channel 1B
Channel 1
Figure 7.1 Block Diagram of DMAC
Содержание H8S/2215 Series
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