E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 165
![no-image](/images/manufacturer_photos/0/5/560/renesas_electronics_america_sml.jpg)
E62655RUSB
Manufacturer Part Number
E62655RUSB
Description
EMULATOR BASE H8S/2655R W/USB
Manufacturer
Renesas Electronics America
Type
Microcontrollerr
Datasheet
1.E62655RUSB.pdf
(1093 pages)
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
- Current page: 165 of 1093
- Download datasheet (6Mb)
6.2
6.2.1
ABWCR is an 8-bit readable/writable register that designates each area for either 8-bit access or
16-bit access.
ABWCR sets the data bus width for the external memory space. The bus width for on-chip
memory and internal I/O registers is fixed regardless of the settings in ABWCR.
In normal mode, the settings of bits ABW7 to ABW1 have no effect on operation.
After a power-on reset and in hardware standby mode, ABWCR is initialized to H'FF in modes 1
to 3, and 5 to 7, and to H'00 in mode 4. It is not initialized by a manual reset or in software
standby mode.
Bits 7 to 0—Area 7 to 0 Bus Width Control (ABW7 to ABW0): These bits select whether the
corresponding area is to be designated for 8-bit access or 16-bit access. In normal mode, only part
of area 0 is enabled, and the ABW0 bit selects whether external space is to be designated for 8-bit
access or 16-bit access.
Note: n = 7 to 0
Bit n
ABWn
0
1
Bit
Modes 1 to 3, 5 to 7
Initial value :
RW
Mode 4
Initial value :
RW
Register Descriptions
Bus Width Control Register (ABWCR)
Description
Area n is designated for 16-bit access
Area n is designated for 8-bit access
:
:
:
ABW7
R/W
R/W
7
1
0
ABW6
R/W
R/W
6
1
0
ABW5
R/W
R/W
5
1
0
ABW4
R/W
R/W
4
1
0
Rev. 5.00 Sep 14, 2006 page 135 of 1060
ABW3
R/W
R/W
3
1
0
ABW2
R/W
R/W
2
1
0
Section 6 Bus Controller
ABW1
REJ09B0331-0500
R/W
R/W
1
1
0
ABW0
R/W
R/W
0
1
0
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