CHAPTER 3 INSTALLATION
User’s Manual U16043EJ2V0UM
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(3) External clock
An external clock connected to the target system can be used via an emulation probe.
Figure 3-5. When Using an External Clock
Remark
The clock supplied by the target system’s clock generator (encircled in the figure) is used.
3.2.2 System clock settings
Table 3-1. System Clock Settings
IE-178054-NS-EM1
Frequency of System Clock
Parts Board (X1)
CPU Clock Source
Selection (ID)
When using clock that is
already mounted on
emulation board
4.5 MHz
Oscillator used
When using clock mounted
by user
Oscillator assembled by user
Internal
When using external clock
Other than 4.5 MHz
Oscillator not used
External
Caution
When using an external clock, open the configuration dialog box when starting the integrated
debugger (ID78K0-NS) and select “External” in the area (Clock) for selecting the CPU’s clock
source (this selects the user’s clock).
Remark
The IE-178054-NS-EM1’s factory settings are those listed above under “when using clock that is already
mounted on emulation board”.
(1) When using clock that is already mounted on emulation board
When the IE-178054-NS-EM1 is shipped, a 4.5 MHz crystal oscillator is already mounted in the IE-178054-NS-
EM1’s X1 socket. When using the factory-set mode settings, there is no need to make any other hardware
settings.
When starting the integrated debugger (ID78K0-NS), open the configuration dialog box and select “Internal” in
the area (Clock) for selecting the CPU’s clock source (this selects the emulator’s internal clock).
IE-78K0-NS or IE-78K0-NS-A
IE-178054-NS-EM1
Clock generator
(to be used)
Emulation probe
Target system
