SH7616 Datasheet, PDF (139/935 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series

Section 3 Oscillator Circuits and Operating Modes
3.2.4 External Clock Input
An external clock is input from the EXTAL pin or the CKIO pin, depending on the clock mode.
Clock Input from EXTAL Pin: This method can be used in clock modes 0, 1, 2, and 3.
CKPREQ/CKM
CKIO
Ground level
The CKIO pin is an output
in clock modes 0, 1, and 2,
and is high-impedance in
Output or
clock mode 3.
high-impedance
EXTAL
External Clock Input
XTAL
Open
Figure 3.3 External Clock Input Method
Clock Input from CKIO Pin: This method can be used in clock modes 4, 5, and 6.
CKPREQ/CKM
CKIO
The CKPREQ/CKM pin is the clock
pause request input pin.
External Clock Input
EXTAL
Open
XTAL
Open
Figure 3.4 External Clock Input Method
Rev. 2.00 Mar 09, 2006 page 113 of 906
REJ09B0292-0200