Renesas RZB-ZMD16C-ZDK user manual Problem, Possible Cause/s and Solution, Table A.3

Applications Engineering

•USB was not selected on the HEW Init dialog box.

Please select ‘USB’ from the Init dialog box that is displayed right after you start a debug session.

•The selected MCU on the ICD board and the actual target MCU (M16C/28) do not match.

Close the error message by clicking on the ‘OK’ button, then click on the ‘Cancel’ button of the Init window. Make sure you select ‘M30280FA.mcu’. If the MCU loaded on the ICD is different, HEW will re-program the ICD to match it.

•The target MCU is damaged.

Try a different target board and see if the HEW will connect. You may have a damaged board or MCU.

A.3.3 Issues that May Arise During Debug Operations

While debugging user code, some issues may come up because the limitations discussed in section “7.0 System Operation & Limitations” were not satisfied. The common issues are listed in Table A.3, including the countermeasures.

Table A.3

Problem		Possible Cause/s and Solution
After stepping	a few	• Changes were made to the UART1 Special Function
instructions, HEW	cannot	Registers (SFRs). Do not change UART1 SFRs in your
“stop”		code.
Breakpoints do not seem to		• System is in “FreeRun” mode. Change the RUN mode to
work		“Sampling” from the “Init” window (Emulator System icon).
HEW locks up (cannot stop		• Changes were made to the UART1 SFRs. Do not change
program) or Communication		UART1 SFRs in your code.
error message is displayed.		• Ensure that no limitations in Section 6 were violated.
		• Re-initialize the system without closing debug session. See
		note below.
		• Do a hardware reset. User-program runaway may be
		corrupting the kernel (RAM, interrupt vectors, flags, etc.).
		Close the debug session, hit the reset button on the ZDK
		board to reset the board, then restart.
Download problems		• Filenames or directory names contain spaces or special
		characters.
		• HEW project was not properly set up (startup files missing or
		out of order, files added to wrong member, etc.). Try
		creating a new project and adding your source files to it. For
		details, please see the HEW User’s Manual.

To re-initialize the system without closing a debug session, try the following:

•Click the [OK] button on the error dialog box to close it.

•When an Exit dialog box appears, click the [Cancel] button to close it.

RZB-ZMD16C-ZDK User’s Manual Rev 1.2 23/ 33 August 2006