DF3026X25V Renesas Electronics America, DF3026X25V Datasheet - Page 153
![MCU 3V 256K PB-FREE 100-TQFP](/photos/28/61/286123/100-tqfp__100-vqfp_sml.jpg)
DF3026X25V
Manufacturer Part Number
DF3026X25V
Description
MCU 3V 256K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Specifications of DF3026X25V
Core Processor
H8/300H
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
PWM, WDT
Number Of I /o
70
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF3026X25V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 153 of 843
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Bits 7 to 0—Area 7 to 0 Bus Width Control (ABW7 to ABW0): These bits select 8-bit access
or 16-bit access for the corresponding areas.
Bits 7 to 0
ABW7 to ABW0
0
1
ABWCR specifies the data bus width of external memory areas. The data bus width of on-chip
memory and registers is fixed, and does not depend on ABWCR settings. These settings are
therefore invalid in the single-chip modes (modes 6 and 7).
6.2.2
ASTCR is an 8-bit readable/writable register that selects whether each area is accessed in two
states or three states.
Bit
Initial value
Read/Write
ASTCR is initialized to H'FF by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bits 7 to 0—Area 7 to 0 Access State Control (AST7 to AST0): These bits select whether the
corresponding area is accessed in two or three states.
Bits 7 to 0
AST7 to AST0
0
1
ASTCR specifies the number of states in which external areas are accessed. On-chip memory and
registers are accessed in a fixed number of states that does not depend on ASTCR settings. These
settings are therefore meaningless in the single-chip modes (modes 6 and 7).
Access State Control Register (ASTCR)
AST7
R/W
7
1
Description
Areas 7 to 0 are 16-bit access areas
Areas 7 to 0 are 8-bit access areas
Description
Areas 7 to 0 are accessed in two states
Areas 7 to 0 are accessed in three states
AST6
R/W
6
1
Bits selecting number of states for access to each area
AST5
R/W
5
1
AST4
R/W
4
1
Rev. 2.00 Sep 20, 2005 page 113 of 800
AST3
R/W
3
1
AST2
R/W
2
1
Section 6 Bus Controller
AST1
REJ09B0260-0200
R/W
1
1
(Initial value)
AST0
R/W
0
1
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