User System Interface - Renesas CE2000-H8S Series User Manual

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Section 6. User System Interface
The user target system is connected to the emulator via the interface cable. Interface circuitry is inserted
in between to remove noise and protect the emulator. When connecting the user target system to the
emulator, user has to consider the adjustment of the user system hardware. Compensation for FAN-IN,
FAN-OUT and propagation delays are necessary. In general, the one-way propogation delay of the
cabling is about 4ns. However, the user clock signal is delayed for approximately 25 ns.
All signals are connected to the MCU with no buffering with the exception of
•
NMI
•
RESET
•
STBY
•
MD[2..0]
•
EXTAL
The emulator does not detect the following signals
•
FWE
•
OSC1
•
OSC2
•
CVCC
•
XTAL
All port signals are pulled up by a 47K ohm resistor with the exception of all analogue pins (Ports 4 and
9).
All signals satisfy the MCU AC timing specification.
The illustration of the user interface circuitry will be as follows.
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