Specifications

I-26 EPSON S1C62N82 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
Note - It takes at least 5 ms from the time the OSC3 oscillation circuit
goes ON until the oscillation stabilizes. Consequently, when
switching the CPU operation clock from OSC1 to OSC3, do this
after a minimum of 5 ms have elapsed since the OSC3 oscilla-
tion went ON.
Further, the oscillation stabilization time varies depending on
the external oscillator characteristics and conditions of use, so
allow ample margin when setting the wait time.
- When switching the clock form OSC3 to OSC1, use a separate
instruction for switching the OSC3 oscillation OFF. An error in
the CPU operation can result if this processing is performed at
the same time by the one instruction.