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M306H7T3-RPD-E User’s Manual 4. Hardware Specifications
REJ10J0964-0100 Rev.1.00 August 01, 2005 Page 70 of 88
4.2 Differences between the Actual MCU and Emulator
Differences between the actual MCU and emulator are shown below. When debugging the MCU using this product, be careful
about the following precautions.
IMPORTANT
Notes on Differences between the Actual MCU and Emulator:
Operations of the emulator system differ from those of actual MCUs as listed below.
Reset condition
Set the time for starting up (0.2 Vcc to 0.8 Vcc) 1 μs or less.
Initial values of internal resource data of an MCU at power-on
Internal memories (ROM and RAM) capacities etc.
With this emulator system, regardless of ROM and RAM of the MCU you use, all the areas other than
the SFR area and a reserved area (addresses 27000h--27FFFh) can be read and written into.
Oscillator circuit
In the oscillator circuit where an oscillator is connected between pins XIN and XOUT, oscillation does
not occur because a converter board is used between the evaluation MCU and the user system. It is
same for pins XCIN and XCOUT. For notes on when using the oscillator circuit on the user system,
refer to "2.9.3 (5) Using the Oscillator Circuit on the User System" (page 41).
A/D converter function
Because a converter board, flexible cable and other devices are used between the evaluation MCU and
the user system, the A/D converter operates differently from that of the actual MCU.
Characteristics of ports P0 to P5
This product emulates some I/O ports (P0 to P5). Therefore, the electrical characteristics of these ports
differ from those of an actual MCU.
DBC, single-step and BRK instruction interrupt vector table addresses
As the emulator uses the DBC, single-step and BRK instruction interrupt vector table addresses, when
reading these addresses, the downloaded data cannot be read (see Table 4.2).
Table 4.2 Vector table addresses for the emulator
Factor of interruption Vector table addresses Data read
DBC*1 FFFF4h--FFFF7h Indefinite
Single-step*1 FFFECh--FFFEFh Indefinite
BRK instruction FFFE4h--FFFE7h Indefinite
*1 Interruption for the emulator only
Pins P57/CLKout
When pins P57/CLKout are used for CLKout function and Fc is selected by Clock output selection in
stop mode, CLKout output does not stop.
Note on RESET* Input:
A low input from the user system to pin RESET* is accepted only while a user program is being
executed (only while the RUN status LED on the PC4701's front panel is lit).
Note on NMI* Input:
A low input from the user system to pin NMI* is accepted only while a user program is being executed
(only while the RUN status LED on the PC4701's front panel is lit).