Renesas SH7058 Technical Information Page 57

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26
Evaluation chip
board
Crystal oscillator terminals
Crystal
oscillator
Enlarged
view
X1 X2
Figure 3.4 Installing the Crystal Oscillator
External Clock: Use the following procedure to select the external clock.
1. Check that the emulator power switch is turned off. (Check that the power LED is not lit.)
2. Connect the evaluation chip board to the user system and supply a clock through the EXTAL
pin from the user system.
3. Turn on the user system power and then the emulator power. USER (the external clock) will
then be automatically specified by a CLOCK command.
Emulator Internal Clock: Specify 5 (5.0 MHz) or 10 (10.0 MHz) in the [Configuration] dialog
box or with the CLOCK command.
Reference:
When the emulator system program is initiated, the emulator automatically selects the MCU clock
source according to the following priority:
1. User system’s clock when an external clock is supplied from the user system
2. Crystal oscillator when attached to the evaluation chip board
3. Emulator internal clock
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