HD6432670 Hitachi, HD6432670 Datasheet - Page 302

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

A block diagram of the DMAC is shown in figure 7.1.
Rev. 2.0, 04/02, page 256 of 906
Internal interrupts
External pins
Interrupt signals
Legend
DMAWER : DMA write enable register
DMATCR : DMA terminal control register
DMABCR : DMA band control register (for all channels)
DMACR
MAR
IOAR
ETCR
DMTEND0A
DMTEND0B
DMTEND1A
DMTEND1B
TGI0A
TGI1A
TGI2A
TGI3A
TGI4A
TGI5A
TXI0
RXI0
TXI1
RXI1
ADI
: DMA control register
: Memory address register
: I/O address register
: Execute transfer count register
Data buffer
Control logic
Figure 7.1 Block Diagram of DMAC
DMABCR
DMAWER
DMATCR
DMACR0A
DMACR0B
DMACR1A
DMACR1B
Internal address bus
Internal data bus
MAR_0AH
MAR_0BH
MAR_1AH
MAR_1BH
Address buffer
Processor
ETCR_0A
ETCR_0B
ETCR_1A
ETCR_1B
IOAR_0A
IOAR_0B
IOAR_1A
IOAR_1B
MAR_0AL
MAR_0BL
MAR_1AL
MAR_1BL