Specifications

II-18 EPSON S1C62N82 TECHNICAL SOFTWARE
CHAPTER 3: PERIPHERAL CIRCUITS (Oscillation Circuit)
Note
• Switching from OSC3 to OSC1
Label Mnemonic/operand Comment
OS1: LD X,0FCH ;Switch the CPU clock to OSC1
AND MX,0111B ;
;
AND MX,1011B ;Set OSC3 to OFF
RET ;Return to parent routine
This subroutine switches the CPU clock to OSC1, and then
sets OSC3 to OFF.
To prevent an error, first switch OSC1, and then set OSC3 to OFF
in the next step.