Datasheet

238
Data buffer
Address bus
Data bus
Address bus
Data bus
Memory
Transfer source
module
Transfer destination
module
Memory
Transfer source
module
Transfer destination
module
SAR
DAR
Data buffer
SAR
DAR
The SAR value is taken as the address, and data is read from the transfer source

module and stored temporarily in the DMAC.
1st bus cycle
2nd bus cycle
The DAR value is taken as the address, and data stored in the DMAC's data
buffer is written to the transfer destination module.
DMAC
DMAC
Figure 11.7 Direct Address Operation during Dual Address Mode