DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 628

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

6. After erasure completes, clear FKEY and specify software protection
(4) Erasing and Programming Procedure in User Program Mode
By changing the on-chip RAM address of the download destination in FTDAR, the erasing
program and programming program can be downloaded to separate on-chip RAM areas.
Figure 20.13 shows a repeating procedure of erasing and programming.
In the above procedure, download and initialization are performed only once at the beginning.
In this kind of operation, note the following:
• Be careful not to damage on-chip RAM with overlapped settings.
Rev.2.00 May. 28, 2009 Page 588 of 732
REJ09B0059-0200
If this LSI is restarted by a reset immediately after user MAT erasure has completed, secure
the reset period (period of RES = 0) of at least 100 μs which is longer than normal.
In addition to the erasing program area and programming program area, areas for the user
procedure programs, work area, and stack area are reserved in on-chip RAM. Do not make
settings that will overwrite data in these areas.
destination of programming
Download erasing program
Initialize erasing program
Figure 20.13 Repeating Procedure of Erasing and Programming
Start procedure program
Download programming
Initialize programming
destination of erasing
Specify a download
program by FTDAR
Specify a download
program by FTDAR
program
program
1
(execute erasing program)
End procedure program
(execute programming
program relevant block
Erase relevant block
Confirm operation
Set FMPDR to
program)
End ?
1
Yes
No