DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 591

• Manufacturer Part Number: DF2357F20
• Description: IC H8S MCU FLASH 5V 128K 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2357F20

• 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: 128KB (128K 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: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

18.1
The H8S/2357, H8S/2352, H8S/2398, and H8S/2392 have 8 kbytes of on-chip high-speed static RAM. The H8S/2394 has
32 kbytes of on-chip high-speed static RAM. The H8S/2390 has 4 kbytes of on-chip high-speed static RAM. The on-chip
RAM is connected to the CPU by a 16-bit bus, and accessing both byte data and word data can be performed in a single
state. Thus, high-speed transfer of word data is possible.
The on-chip RAM can be enabled or disabled by means of the RAM enable bit (RAME) in the system control register
(SYSCR).
18.1.1
Figure 18-1 shows a block diagram of the 8-kbytes of on-chip RAM.
18.1.2
The on-chip RAM is controlled by SYSCR. Table 18-1 shows the address and initial value of SYSCR.
Table 18-1 RAM Register
Note: * Lower 16 bits of the address.
Overview
Block Diagram
Register Configuration
Name
System control register
Figure 18-1 Block Diagram of RAM (8 kbyte)
H'FFDC00
H'FFDC02
H'FFDC04
H'FFFBFE
Section 18 RAM
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Abbreviation
SYSCR
R/W
R/W
H'FFDC01
H'FFDC03
H'FFDC05
H'FFFBFF
Initial Value
H'01
Rev.6.00 Oct.28.2004 page 561 of 1016
Address*
H'FF39
REJ09B0138-0600H