R0E00008AKCE00EP63 Datasheet, PDF (79/158 Pages) Renesas Technology Corp – Microcomputer Development Environment System

Section 5 Differences between the MCUs and the Emulator
7. System Control Register
In the emulator, the internal I/O registers can be accessed from the [IO] window. However, be
careful when accessing the system control register. The emulator saves the register value of
the system control register at a break and returns the value when the user program is executed.
Since this is done during a break, do not rewrite the system control register in the [IO] window.
8. Memory Access during Emulation
If the memory contents are referenced or modified during emulation, realtime emulation
cannot be performed because the user program is temporarily halted.
9. The emulator communicates with the MCUs by using the NMI#, RES#, P16, P36, and P37
pins. These pins cannot be used, however, the NMI# pin can be used by changing the setting
of the [NMI signal] group box in the [Configuration] dialog box.
10. Sum Data Displayed in the Program Flash Mode
Sum data, which is displayed in the ‘Program Flash’ mode, is a value that data in the whole
ROM areas has been added by byte (including data in the dedicated ROM area for the
emulator).
11. Note on Executing the User Program
The set value is rewritten since the emulator uses flash memory and watchdog timer registers
during programming (Go, Step In, Step Out, or Step Over) of the flash memory.
12. The power consumed by the MCU can reach several milliamperes. This is because the user
power supply drives ICs to make the communication signal level match the user-system
power-supply voltage. The power consumed rises little during user program execution since
the emulator does not perform communication; it rises more during a break.
13. Program Area for the Emulator
Do not access a part of areas in the flash memory or the internal RAM since the emulator
program uses these areas. If the contents of the program area for the emulator are changed, the
emulator will not operate normally. In this case, restart the emulator with the Erase Flash and
Connect mode.
Rev. 1.00 Aug. 03, 2009 Page 19 of 26
REJ10J2023-0100