Technical information

Renesas E10A-USB Emulator
Introductory Guide for SH/Tiny (SH7125)
REJ06J0007-0100/Rev.1.00 February 2007 Page 38 of 43
8. Frequently Asked Questions
If a communication error has occurred at startup, confirm the following.
1) The USB cable and user system interface cable are correctly connected.
2) The power is supplied to the MCU board from an external power source.
3) "SH7125_Debug_MCU_BOARD" was selected for [Select Emulator mode] when the E10A-USB emulator was
connected.
4) The SH7125 debugging MCU board is set up for single-unit operation. Set SW2-3 to the DISABLE side to specify
the single-unit operation mode.
8.2 A communication error has occurred during debugging.
If a communication error has occurred during debugging, confirm the following.
1) The firmware may have gone out of control due to user program execution (going out of control or accessing to the
monitor area). Disconnect the USB cable of the E10A-USB emulator from the host computer, connect it again, and
then restart the emulator software.
2) The H-UDI settings should not be modified. Do not access the H-UDI because the E10A-USB emulator uses it.
8.3 Do the on-chip peripheral modules work after a break occurs?
While the program is stopped due to a break, the CPU does not accept interrupts but the peripheral modules continue
operation. For example, when the user program stops due to a break after a timer has started counting, the timer
continues counting but the CPU does not accept timer interrupts. Note that the watchdog timer (WDT) stops counting
while the program is stopped.
8.4 Other Frequently Asked Questions
Refer to the FAQs at the following website address for the questions and answers about the Renesas products including
the E10A-USB emulator.
http://www.renesas.com/e10a_usb
8.1 A communication error has occurred at startup.
(Global site)
Access the above address and click the FAQs at the left side of the page.