User`s manual

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3.3 User System Interface Circuit
3.3.1 User System Interface Circuit
The circuits that interface the MCU in the emulator to the user system include the level-shifter circuits (for 5 V
and 3.3 V) and resistors. When connecting the emulator to a user system, adjust the user system hardware
compensating for FANIN, FANOUT, and propagation delays.
The user system interface circuits connected to the user system are shown in figure 3.2.
The delay time is generated on the timing of the _RES, _NMI, and _STBY signals when they are input to the
MCU from the user system, as shown in table 3.2, because this connection for those signals is via logic circuit on
the emulator’s front-end unit.
Table 3.2 Delay Time for Signal Connected via the Emulator’s Front-end Unit
Signal Name Delay Time (ns)
_RES 27
_NMI 27
_STBY 27