1. Product and Versions Concerned
E8a Emulator Software
V.1.00 Release 00 and V.1.00 Release 00A
2. Description
The 740 E8a Emulator Debugger included in the product concerned may cause
the following symptoms to appear:
- The user program does not halt at the PC and Event breakpoints.
- During normal or single-step execution of the user program,
"Communication Timeout Error" arises.
3. Conditions
This problem may occur if the following conditions are all satisfied:
(1) The 740 E8a Emulator Debugger included in this product is running.
(2) Any of the MCUs of the 38D5 group is used in the target system.
(3) One or more interrupt request flags of the user interrupts are
set to 1.*
*Even if the user program is halted on the debugger, user
interrupts are not prohibited. So some of their interrupt request
flags may be set to 1.
4. Solution
This problem has been resolved in E8a Emulator Software V.1.01
Release 00, which will be released on February 5, 2008. So use
this revised version.
For details of the V.1.01 Release 00 product, see RENESAS TOOL NEWS
Document No. 080205/tn4, published also on February 5, on the Web
page at
http://tool-support.renesas.com/eng/toolnews/080205/tn4.htm
(available on and after February 5.)
Note, however, that on E8a Emulator Software V.1.01 Release 00 and
may be on later versions, the following restriction is still imposed:
Restriction:
The I flag (Interrupt Disable Flag) must not be set to 1 in the user
program.
(Setting the flag to 1 prohibits all the interrupts except BRK.)
If the I flag is set to 1, the following operations cannot be
performed:
- To reference and rewrite memory during program execution
- To update the Watch window automatically during program execution
- To stop the user program by pressing the STOP button
However, the PC and Event breakpoints are valid even if the I flag
is set to 1 because they are not affected by the state of the flag.
