E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 254

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 7 DMA Controller
7.2.1
MAR is a 32-bit readable/writable register that specifies the transfer source address or destination
address.
The upper 8 bits of MAR are reserved: they are always read as 0, and cannot be modified.
Whether MAR functions as the source address register or as the destination address register can be
selected by means of the DTDIR bit in DMACR.
MAR is incremented or decremented each time a byte or word transfer is executed, so that the
address specified by MAR is constantly updated. For details, see section 7.2.4, DMA Control
Register (DMACR).
MAR is not initialized by a reset or in standby mode.
Rev. 5.00 Sep 14, 2006 page 224 of 1060
REJ09B0331-0500
Bit
MAR
Initial value
R/W
Bit
MAR
Initial value
R/W
Legend: *: Undefined
Memory Address Registers (MAR)
:
:
:
:
:
:
:
:
R/W
31
15
—
—
0
*
R/W
30
14
—
—
0
*
R/W
29
13
—
—
0
*
R/W
28
12
—
—
0
*
R/W
27
11
—
—
0
*
R/W
26
10
—
—
0
*
R/W
25
—
—
0
9
*
R/W
24
—
—
0
8
*
R/W
R/W
23
*
7
*
R/W
R/W
22
6
*
*
R/W
R/W
21
*
5
*
R/W
R/W
20
4
*
*
R/W
R/W
19
*
3
*
R/W
R/W
18
2
*
*
R/W
R/W
17
1
*
*
R/W
R/W
16
*
0
*