NEC IE-789835-NS-EM1, Руководство пользователя

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CHAPTER 3 INSTALLATION
User’s Manual U16290EJ1V0UM
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(3) Pulse input from target system
The pulse supplied by an external clock can be used as the main system clock and subsystem clock on the
target system via an emulation probe.
Figure 3-10. When Supplying Pulse from Target System
IE-78K0S-NS or IE-78K0S-NS-A
IE-789835-NS-EM1
Emulation probe
Target system
External clock
(used)
Mounted oscillator,
resonator
(not used)
X1
XTC1
Remark The clock supplied by the target system’s external clock (encircled in the figure) is used.
3.4.2 Main system clock settings
The main system clock settings of the IE-789835-NS-EM1 are as shown in Table 3-4.
The following shows the respective IE-789835-NS-EM1 settings for the main system clocks used in (1) to (3) in
Table 3-4.
Table 3-4. Main System Clock Settings
IE-789835-NS-EM1 Frequency of Main System Clock
X1 Socket
CPU Clock Source
Selection (ID78K0S-NS)
(1) When using clock that is already
mounted on emulation board
5.0 MHz Oscillator used Internal
(2) When using clock mounted by user Oscillator assembled by user
(3) When pulse is input from target system
Other than 5.0
MHz
Oscillator (not used) External
Caution When a pulse is input from the target system, open the configuration dialog box when starting
the integrated debugger (ID78K0S-NS) and select “External” in the area (Clock) for selecting the
CPU’s clock source (this selects the user clock). Emulating using the RC oscillator is not
possible.
Remark When the IE-789835-NS-EM1 is shipped, the settings for “when using clock that is already mounted on
emulation board” are preset.
(1) When using clock that is already mounted on emulation board
When the IE-789835-NS-EM1 is shipped, a 5.0 MHz crystal oscillator is already mounted in the IE-789835-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 (ID78K0S-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).