Renesas Single-Chip Microcomputer M37900T2-RPD-E Informacje Techniczne Pobierz pdf (Strona 23)

( 21 / 44 )

(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

or the CLK command of 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 emulator MCU) into the XIN pin. And the XOUT pin

should be open (same for XCIN).

• Make note of the fact that in the oscillator circuit shown in Figure 3.2 where a

resonator is connected between the XIN and XOUT pins, oscillation does not occur

because a flexible cable, buffer IC and other devices are used between the emulator

MCU and the target system (same for XCIN).

• To use the external clock supply for XCIN, set the JP3 shown in "3.2 Switch Settings"

to "P52" side.

Figure 3.1 External oscillator circuit

Figure 3.2 Circuit in which oscillation does not occur

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 45 46

Brak uwag

Renesas Single-Chip Microcomputer M37900T2-RPD-E Informacje Techniczne Strona 23