3069RF-ZTAT Datasheet, PDF (219/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

7.1.3 Functional Overview
Table 7.1 gives an overview of the DMAC functions.
Table 7.1 DMAC Functional Overview
Address
Reg. Length
Transfer Mode
Activation
Destina-
Source tion
Short
I/O mode
• Compare match/input
24
8
address
mode
• Transfers one byte or one word
per request
• Increments or decrements the
memory address by 1 or 2
• Executes 1 to 65,536 transfers
capture A interrupts from
16-bit timer channels
0 to 2
• Transmit-data-empty
interrupt from SCI channel 0
Idle mode
• Conversion-end interrupt 8
24
• Transfers one byte or one word per
request
from A/D converter
• Receive-data-full interrupt
• Holds the memory address fixed
from SCI channel 0
• Executes 1 to 65,536 transfers
• External request
24
8
Repeat mode
• Transfers one byte or one word per
request
• Increments or decrements the
memory address by 1 or 2
• Executes a specified number (1 to
255) of transfers, then returns to the
initial state and continues
Full
address
mode
Normal mode
• Auto-request
 Retains the transfer request
internally
• Auto-request
• External request
24
24
 Executes a specified number(1 to
65,536) of transfers continuously
 Selection of burst mode or cycle-
steal mode
• External request
 Transfers one byte or one word
per request
 Executes 1 to 65,536 transfers
Block transfer
• Compare match/ input
24
24
• Transfers one block of a specified size
per request
capture A interrupts from
16-bit timer channels 0 to 2
• Executes 1 to 65,536 transfers
• External request
•
Allows either the source or destination ^•
to be a fixed block area
Conversion-end interrupt
from A/D converter
• Block size can be 1 to 255 bytes or
words
Rev. 5.0, 09/04, page 197 of 978