User`s manual

3. When the emulator system is initiated, it initializes the general registers and part of the control registers as shown in

Table 5.3.

Table 5.3 Register Initial Values at Emulator Power-On

Status Register Initial Value

PC Reset vector value in the vector address table

R0 to R3 (bank 0, 1) 0000h

A0, A1 (bank 0, 1) 0000h

FB (bank 0, 1) 0000h

INTB 0000h

USP 0000h

ISP 05FFh

SB 0000h

Emulator

Power-On

FLG 0000h

4. Operation clock during a break

As the emulator is controlled independent of a user’s system clock during a user program break, it operates with the

internal high-speed on-chip oscillator (approx. 8 MHz).

5. Reset

To reset the MCU when debugging by the E8 emulator, select [Debug] -> [Reset CPU] or use the RESET command.

If the emulator is reset differently, the E8 cannot be controlled.

6. Memory access during emulation execution

When referring or modifying the memory contents, the user program is temporarily halted. For this reason, realtime

emulation cannot be performed.

7. The emulator communicates with the MCUs by using the MODE, RESET

, P00, P37 and CNVss pins.

8. The power consumed by the MCU increases by several mA or over 10 mA. This is because the user power supply

drives one 74LVC125A to make the communication signal level match the user-system power-supply voltage.

9. The emulator uses up to four-word stack pointer when a user program breaks. Accordingly, reserve the four-word

addresses for the stack area.

10. When debugging, the flash memory is frequently re-written by the E8 emulator. Therefore, do not use an MCU that

has been used for debugging.

Also, as the program for the E8 emulator is written into the MCU while debugging, do not save the contents of the

MCU’s flash memory that have been used for debugging or use them as the ROM data for products.