h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 198

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

Rev. 2.00, 03/04, page 166 of 534
Bit
12
11
10
9
8
Bit Name
SARA4
SARA3
SARA2
SARA1
SARA0
Initial
Value
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
Description
Source Address Repeat Area
These bits specify the source address (DMSAR) 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 source address (DMSAR) as
00001: Lower 1 bit (2-byte area) in DMSAR designated
00010: Lower 2 bits (4-byte area) in DMSAR
00011: Lower 3 bits (8-byte area) in DMSAR
00100: Lower 4 bits (16-byte area) in DMSAR
10011: Lower 19 bits (512-kbyte area) in DMSAR
10100: Lower 20 bits (1-Mbyte area) in DMSAR
10101: Lower 21 bits (2-Mbyte area) in DMSAR
10110: Lower 22 bits (4-Mbyte area) in DMSAR
10111: Lower 23 bits (8-Mbyte area) in DMSAR
repeat area
as repeat area
designated as repeat area
designated as repeat area
designated as repeat area
designated as repeat area
designated as repeat area
designated as repeat area
designated as repeat area
designated as repeat area
:
: