DF3026X25V Renesas Electronics America, DF3026X25V Datasheet - Page 171
![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: 171 of 843
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6.4
6.4.1
The basic bus interface enables direct connection of ROM, SRAM, and so on.
The bus specifications can be selected with ABWCR, ASTCR, WCRH, and WCRL
(see table 6.3).
6.4.2
Data sizes for the CPU and other internal bus masters are byte, word, and longword. The bus
controller has a data alignment function, and when accessing external space, controls whether the
upper data bus (D
for the area being accessed (8-bit access area or 16-bit access area) and the data size.
8-Bit Access Areas: Figure 6.6 illustrates data alignment control for 8-bit access space. With 8-
bit access space, the upper data bus (D
that can be accessed at one time is one byte: a word access is performed as two byte accesses, and
a longword access, as four byte accesses.
Byte size
Word size
Longword size
Basic Bus Interface
Overview
Data Size and Data Alignment
Figure 6.6 Access Sizes and Data Alignment Control (8-Bit Access Area)
15
to D
8
) or lower data bus (D
1st bus cycle
2nd bus cycle
1st bus cycle
2nd bus cycle
3rd bus cycle
4th bus cycle
15
to D
8
) is always used for accesses. The amount of data
7
to D
D
15
Upper data bus
0
) is used according to the bus specifications
Rev. 2.00 Sep 20, 2005 page 131 of 800
D
8
D
7
Lower data bus
Section 6 Bus Controller
REJ09B0260-0200
D
0
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