Renesas Single-Chip Microcomputer M37900T2-RPD-E - Manual (Page 21)

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(1) Using the Oscillator Circuit on the Target System
When turning on the power supply, the internal clock of the emulation pod is selected to supply the
clock to the MCU. To use the external clock on the target system, change the clock by the Init dialog
box or CLK command on the emulator debugger (for details, refer to the user's manual of the emulator
debugger).
IMPORTANT
Notes on External Clock:
• To operate the emulation pod with an external clock, construct the oscillator circuit
as shown in Figure 3.1 in the target system and input the oscillator output at 50% duty
(within the operating range of the evaluation MCU) into the X
IN
pin. And the X
OUT
pin should be open.
• Make note of the fact that in the oscillator circuit shown in Figure 3.2 where a
resonator is connected between the X
IN
and X
OUT
pins, oscillation does not occur
because a flexible cable, buffer IC and other devices are used between the evaluation
MCU and the target system.
Figure 3.1 External oscillator circuit
Figure 3.2 Circuit in which oscillation does not occur