Subsystem Clock; Main System Clock Settings; Figure 3-9: When Using An External Clock; Table 3-22: Main System Clock Settings - NEC IE-78K0-NS-P04 Preliminary User's Manual

(3) External clock
An external clock connected to the target system can be used via the emulation probe.
IE-78K0-NS-A
Remark: The clock supplied by the target system's clock generator (encircled in the figure) is used.

3.2.3 Subsystem Clock

The IE-78K0-NS-P04 supports the using of a subclock for the emulation. But this function is not
supported by the µPD780828B(A) series.

3.2.4 Main system clock settings

Frequency of Main System Clock
When using clock that is
already mounted on
emulation board
When using clock
mounted by user
When using external
clock
Caution:When using an an user defined clock or external clock, open the configuration dialog
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-78K0-NS-P04 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-78K0-NS-P04 is shipped, an 8.0000-MHz crystal resonator is already mounted in the
IE-78K0-NS-P04 X4 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 and select
"Internal" in the area (Clock) for selecting the CPU's clock source (this selects the emulator's internal
clock).
IE-78K0-NS-P04, IE-780828-NS-EM4

Figure 3-9: When Using an External Clock

Emulation probe

Table 3-22: Main System Clock Settings

8.0000 MHz
Other than 8.0000 MHz
Target system
Clock generator
(to be used)
IE-78K0-NS-P04
Shortcut 6-8
Includes oscillator circuit
Shortcut 6-8
CPU Clock Source
Selection (ID-78K0-NS)
Internal
External
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