Clock Settings; Overview Of Clock Settings; Figure 3-6: External Circuits Used As System Clock Oscillation Circuit - NEC IE-78K0-NS-P04 User Manual

3.2 Clock Settings

3.2.1 Overview of clock settings

Main system clock
Select from (1) to (3) below as the main system clock and subsystem clock to be used during
debugging.
(1) Clock that is already mounted on emulation board
(2) Clock that is mounted by user
(3) External clock
If the target system includes an internal clock, select either "(1) Clock that is already mounted on
emulation board" or "(2) Clock that is mounted by user". An internal clock connects the target device to
an oscillator and uses the target device's internal oscillation circuit. An example of an external circuit
is shown in part (a) of Figure 3-2. During emulation, the oscillator that is mounted on the target system
is not used. Instead, it uses the clock that is mounted on the emulation board which is installed for the
IE-78K0-NS-A.
If the target system includes an external clock, select "(3) External clock".
An external clock supplies a clock signal from outside of the target device and does not use the target
device's internal oscillation circuit. An example of an external circuit is shown in part (b) of Figure 3-2.

Figure 3-6: External Circuits Used as System Clock Oscillation Circuit

IE-78K0-NS-P04, IE-780948-NS-EM4
Target device
External
X1 or CL1
clock
X2 or CL2
Target device
X1 or CL1
X2 or CL2
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