DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 681

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

21.1
The H8S/2148, H8S/2144, and H8S/2143 have 4 kbytes of on-chip high-speed static RAM, and
the H8S/2147, H8S/2147N, and H8S/2142 have 2 kbytes. The on-chip RAM is connected to the
CPU by a 16-bit data bus, enabling both byte data and word data to be accessed in one state. This
makes it possible to perform fast word data transfer.
The on-chip RAM can be enabled or disabled by means of the RAM enable bit (RAME) in the
system control register (SYSCR).
21.1.1
Figure 21.1 shows a block diagram of the on-chip RAM.
Overview
Block Diagram
Figure 21.1 Block Diagram of RAM (H8S/2148, H8S/2144, H8S/2143)
H'FFEFFE
H'FFFF7E
H'FFE080
H'FFE082
H'FFE084
H'FFFF00
Section 21 RAM
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'FFEFFF
Rev. 4.00 Sep 27, 2006 page 635 of 1130
H'FFFF7F
H'FFE081
H'FFE083
H'FFE085
H'FFFF01
REJ09B0327-0400
Section 21 RAM