DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 586

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

Section 17 ROM
Flash Memory Emulation in RAM: Emulation should be performed in user mode or user
program mode. When the emulation block set in RAMER is accessed while the emulation function
is being executed, data written in the overlap RAM is read.
Rev. 4.00 Feb 15, 2006 page 560 of 900
REJ09B0291-0400
Reading Overlap Data in User Mode and User Program Mode
Writing Overlap Data in User Program Mode
When overlap RAM data is confirmed, the RAMS bit is cleared, RAM overlap is released, and
writes should actually be performed to the flash memory.
When the programming control program is transferred to RAM, ensure that the transfer
destination and the overlap RAM do not overlap, as this will cause data in the overlap RAM to
be rewritten.
Figure 17.11 Reading Overlap Data in User Mode and User Program Mode
Application program
Application program
Figure 17.12 Writing Overlap Data in User Program Mode
Programming data
Emulation block
Execution state
Flash memory
Flash memory
(emulation is performed
program execution state
on data written in RAM)
Programming control
(programming data)
Overlap RAM
Overlap RAM
RAM
RAM
SCI
SCI