R0E00008AKCE00EP62 Datasheet, PDF (24/82 Pages) Renesas Technology Corp – Microcomputer Development Environment System

Section 5 Differences between the MCUs and the Emulator
4. When the emulator system is initiated, it initializes the general registers and part of the control
registers as shown in table 5.1.
Table 5.1 Register Initial Values at Emulator Power-On
Register
PC
ER0 to ER6
ER7 (SP)
CCR
Initial Value
Reset vector value in the vector address table
H’0000
H'FF80 (H'FFFF80 for H8/36049F, H8/36109F, and H8/36079F)
H’80
5. Low-Power Mode
During a user program break, the CPU operating frequency is forced to a system clock (φ) for
high-speed operation.
6. RES# Signal
The MCU signals are only valid during user program execution started with clicking the GO or
STEP-type button. During a user program break, the RES# signal is not sent to the MCUs.
Note: Do not start user program execution or access the memory while control input signal
(RES#) is being low. A TIMEOUT error will occur.
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#, and P85 to P87 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.
Rev. 1.00 Aug.03, 2009 Page 18 of 26
REJ10J2022-0100