DS07-16301-4E Datasheet, PDF (38/99 Pages) Fujitsu Component Limited. – 32-bit RISC Microcontroller CMOS FR30 Series

MB91101/MB91101A
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 en-
hanced 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
3
Edge/level
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
38