HD64F2338VFC25 Renesas Electronics America, HD64F2338VFC25 Datasheet - Page 166

• Manufacturer Part Number: HD64F2338VFC25
• Description: MCU 3V 256K 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of HD64F2338VFC25

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 106
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

6.2
6.2.1
Modes 5 to 7
Mode 4
ABWCR is an 8-bit readable/writable register that designates each area as either 8-bit access space
or 16-bit access space.
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.
After a reset and in hardware standby mode, ABWCR is initialized to H'FF in modes 5 to 7 * , and
to H'00 in mode 4. It is not initialized in software standby mode.
Note: * Modes 6 and 7 cannot be used in the ROMless version.
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 as 8-bit access space or 16-bit access space.
Bit n
ABWn
0
1
(n = 7 to 0)
Rev.4.00 Sep. 07, 2007 Page 134 of 1210
REJ09B0245-0400
Bit
Initial value :
R/W
Initial value :
R/W
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
ABW3
R/W
R/W
1
0
3
ABW2
R/W
R/W
2
1
0
ABW1
R/W
R/W
1
1
0
ABW0
R/W
R/W
0
1
0