HD6432633 Datasheet, PDF (297/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

8.1.3 Overview of Functions
Tables 8-1 (1) and (2) summarize DMAC functions in short address mode and full address mode,
respectively.
Table 8-1 (1) Overview of DMAC Functions (Short Address Mode)
Address Register Bit Length
Transfer Mode
Transfer Source
Source
Destination
Dual address mode
•
• Sequential mode
 1-byte or 1-word transfer
executed for one transfer request
 Memory address
•
incremented/decremented by 1
or 2
•
 1 to 65536 transfers
• Idle mode
•
 1-byte or 1-word transfer
executed for one transfer request
 Memory address fixed
•
TPU channel 0 to ^24/16
5 compare
match/input
capture A interrupt
SCI transmit-data-
empty interrupt
SCI reception
complete interrupt
A/D converter
conversion end
interrupt
External request
16/24
 1 to 65536 transfers
• Repeat mode
 1-byte or 1-word transfer
executed for one transfer request
 Memory address incremented/
decremented by 1 or 2
 After specified number of
transfers (1 to 256), initial state is
restored and operation continues
Single address mode
• External request
• 1-byte or 1-word transfer executed
for one transfer request
• Transfer in 1 bus cycle using DACK
pin in place of address specifying I/O
24/DACK
DACK/24
• Specifiable for sequential, idle, and
repeat modes
243