SH7047 Datasheet, PDF (93/764 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTMRISC engine Family/SH7000 Series

4.1.2 External Clock Input Method
Figure 4.4 shows an example of an external clock input connection. In this case, make the external
clock high level to stop it in standby mode. During operation, make the external input clock
frequency 4 to 12.5 MHz.
When leaving the XTAL pin open, make sure the stray capacitance is less than 10 pF.
Even when inputting an external clock, be sure to wait at least the oscillation stabilization time in
power-on sequence or in releasing standby mode, in order to ensure the PLL stabilization time.
EXTAL
XTAL
External clock input
Open state
Figure 4.4 Example of External Clock Connection
Rev. 2.00, 09/04, page 53 of 720