User's Manual
R20UT2220EJ0200 Rev.2.00
Page 6 of 8
Mar 05, 2014
7. Notes on Usage
READ the following warnings before using this product. Incorrect operation will damage this product and the user
system. The USER PROGRAM will be LOST.
Notes on Connecting the Debugging MCU Board:
•
Cables must not be connected or removed while the power is on.
•
Before connecting this product and the user system, check that the pin 1 locations on both sides are
correctly aligned with each other.
Note on Rewriting the Flash Memory:
•
The number of times that the flash memory in the MCU installed on this product can be programmed is
limited. If an error in erasure occurs during debugging, replace this product.
Notes on Debugging:
•
This product is only usable for debugging when it is connected to the user system.
•
Debugging by this product alone is not supported.
Notes on Starting the Debugger and Selecting the MCU Type:
•
Select the MCU type for use in the device name section of the [Initial Settings] dialog box on initiation of
the debugger.
Note on Differences between the MCU to be Debugged and This Product:
•
The ROM size of the MCU installed in this product is 2MB. Note that if the ROM size of the MCU to be
debugged is smaller than that of this product, access can be made to the differential area.
Notes on Designing the User System:
•
Pull the levels on the EMLE pin down to
4.7 kΩ to 10 kΩ.
•
P
ull the levels on the MD pin up to 4.7 kΩ to 10 kΩ, and select
the single-chip mode.
•
The output of the reset circuit of the user system must be open collector.
Note on the Flash Programming Software Products (Flash Development Toolkit, Renesas Flash Programmer, etc.):
•
Do not use the flash programming software products when using this product.
Note on the Writing the On-chip Flash Memory Mode:
•
If the debugger has an exclusive mode for flash writing (e.g. “writing the on-chip flash memory mode” of
High-performance Embedded Workshop), do not use the mode.
Note on the A/D Converter:
•
The characteristics of the A/D converter differ from those of actual MCU because there are a converter
board and other devices between the MCU and the user system.
Note on the Hot Plug-in Function:
•
Do not use the hot plug-in function when using this product.
Note on the Use of a Low CL Crystal Resonator for the Sub-clock Oscillator:
•
Note that the longer sub-clock wiring pattern resulting from the use of this product may cause a failure in
sub-clock oscillation or affect the oscillating accuracy.
Note on Communication Interface:
•
Use this product via JTAG communication.
