Datasheet

Section 8 EXDMA Controller (EXDMAC)
R01UH0310EJ0500 Rev. 5.00 Page 419 of 1384
Sep 25, 2012
H8S/2426, H8S/2426R, H8S/2424 Group
Bit Bit Name Initial Value R/W Description
12
11
10
9
8
SARA4
SARA3
SARA2
SARA1
SARA0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
Source Address Repeat Area
These bits specify the source address (EDSAR)
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 SARIE 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
repeat area
00010: Lower 2 bits (4-byte area) designated as
repeat area
00011: Lower 3 bits (8-byte area) designated as
repeat area
00100: Lower 4 bits (16-byte area) designated as
repeat area
: :
10011: Lower 19 bits (512-Kbyte area) designated
as repeat area
10100: Lower 20 bits (1-Mbyte area) designated
as repeat area
10101: Lower 21 bits (2-Mbyte area) designated
as repeat area
10110: Lower 22 bits (4-Mbyte area) designated
as repeat area
10111: Lower 23 bits (8-Mbyte area) designated
as repeat area
11xxx: Setting prohibited