PG-FP6 V1.06 13. Points for Caution
R20UT4469EJ0800 Rev.8.00 Page 156 of 188
Oct.01.21
13.Points for Caution
This chapter gives some notes on rewriting the memory in the target device.
13.1 Checking before Connection
• Applies to: All MCUs
Connection of the target device in the cases listed below may damage the tool in use or the target system
due to conflicts between signals. Be sure to check that the settings and circuit connection are correct.
The type of the target device to be connected was mistaken.
The wrong recommended circuit was used for the target device.
The output setting of mode setting pins was wrong while the setting is for manual entry to boot mode.
The power-supply setting was wrong.
13.2 Manipulating the User Boot Mat
• Applies to: RX610 series
If a valid ID code has not been set before the MCU is connected (i.e. the device is not protected),
manipulation of the user boot mat is not possible on completion of the connection. To enable
manipulation of the user boot mat, set a valid ID code before connecting the MCU.
• Applies to: SH family
Reading and uploading of data in user boot mat areas are not supported.
• Applies to: SH family
If you are using program files other than a DDI-format file, do not select blocks in both code flash and
user boot flash areas at the same time on the [Block Settings] tabbed page of the [Setup] dialog box.
13.3 Erasing a Chip
• Applies to: RH850 family
When a chip is erased, the configuration data are cleared after all other data have been erased. In other
words, the option settings of the MCU are all erased. Since all settings, including the settings at the time
of shipment, are erased, be sure to make the required settings at the same time.
In addition, processing to clear the configuration data is prohibited in some MCUs. When you wish to
erase a chip, refer to the user’s manual of the target device in use and determine whether the processing
is available.
13.4 Auto-Padding with 0xFF
• Applies to: All MCUs
When an amount of data is less than the minimum unit for programming a flash memory, the data are
always padded with 0xFF before programming.
• Applies to: RX
When programming the configuration setting area, parts with no data will be padded with 0xFF.
To Next Page
Loading...
