DS07-16303-3E Datasheet, PDF (37/97 Pages) Fujitsu Component Limited. – 32-bit RISC Microcontroller CMOS FR30 Series

MB91121
2. DMA Controller (DMAC)
The DMA controller is a module embedded in FR family devices, and performs DMA (direct memory access)
transfer.
DMA transfer performed by the DMA controller transfers data without intervention of CPU, contributing to
enhanced performance of the system.
• 8 channels
• Mode : single/block transfer, burst transfer and continuous transfer : 3 kinds of transfer
• Transfer all through the area
• Max. 65536 of transfer cycles
• Interrupt function right after the transfer
• Selectable for address transfer increase/decrease by the software
• External transfer request input pin, external transfer request accept output pin, external transfer complete
output pin three pins for each
• Block diagram
3
DREQ0 to DREQ2
5
Inner resource
transfer request
Edge/level
3
detection circuit
Sequencer
3
DACK0 to DACK2
3
EOP0 to EOP2
8
Interrupt request
Data buffer
BLK DEC
INC / DEC
Switcher
DPDP
DACSR
DATCR
Mode
BLK
DMACT
SADR
DADR
37