r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 435

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Legend:
×: Don’t care
Bit
4
3
2
1
0
Bit Name
DARA4
DARA3
DARA2
DARA1
DARA0
Initial Value
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
Description
Destination Address Repeat Area
These bits specify the destination address
(EDDAR) repeat area. The repeat area function
updates the specified lower address bits, leaving
the remaining upper address bits always the
same. A repeat area size of 2 bytes to 8 Mbytes
can be specified. The setting interval is a power-
of-two number of bytes. When repeat area
overflow results from incrementing or
decrementing an address, the lower address is the
start address of the repeat area in the case of
address incrementing, or the last address of the
repeat area in the case of address decrementing.
If the DARIE bit is set to 1, an interrupt can be
requested when repeat area overflow occurs.
00000: Not designated as repeat area
00001: Lower 1 bit (2-byte area) designated as
00010: Lower 2 bits (4-byte area) designated as
00011: Lower 3 bits (8-byte area) designated as
00100: Lower 4 bits (16-byte area) designated as
10011: Lower 19 bits (512-Kbyte area) designated
10100: Lower 20 bits (1-Mbyte area) designated
10101: Lower 21 bits (2-Mbyte area) designated
10110: Lower 22 bits (4-Mbyte area) designated
10111: Lower 23 bits (8-Mbyte area) designated
11×××: Setting prohibited
repeat area
repeat area
repeat area
repeat area
as repeat area
as repeat area
as repeat area
as repeat area
as repeat area
:
Rev. 1.00 Sep. 19, 2008 Page 405 of 1342
Section 8 EXDMA Controller (EXDMAC)
:
REJ09B0467-0100