DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 155

• Manufacturer Part Number: DF2398TE20
• Description: IC H8S MCU FLASH 256K 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 120-TQFP, 120-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2398TE20; HD64F2398TE20

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
(D
and the data size.
8-Bit Access Space: Figure 6-4 illustrates data alignment control for the 8-bit access space. With the 8-bit access space,
the upper data bus (D
a word transfer instruction is performed as two byte accesses, and a longword transfer instruction, as four byte accesses.
7
to D
0
) is used according to the bus specifications for the area being accessed (8-bit access space or 16-bit access space)
Basic Bus Interface
Overview
Data Size and Data Alignment
Byte size
Word size
Longword size
15
Figure 6-4 Access Sizes and Data Alignment Control (8-Bit Access Space)
to D
8
) is always used for accesses. The amount of data that can be accessed at one time is one byte:
1st bus cycle
2nd bus cycle
1st bus cycle
2nd bus cycle
3rd bus cycle
4th bus cycle
D
15
Upper data bus
D
8
D
Rev.6.00 Oct.28.2004 page 125 of 1016
7
Lower data bus
15
to D
D
0
8
) or lower data bus
REJ09B0138-0600H