GMS84512 Datasheet, PDF (37/123 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTER

GMS 84512 / 84524
3.2.1 Oscillation Circuit
The clock signal incoming from crystal oscillator or ceramic resonator via Xin and Xout, or from
external clock via Xin is supplied to Clock Pulse Generator and Prescaler
Internal System Clock for CPU is made by Clock Pulse Generator, and several peripheral clock
is
devided by prescaler
Clock Generation circuit of Crystal Oscillator or Ceramic Resonator is shown in Fig.3.2.2
¨ çClock Generation Circuit by Crystal Oscillator or Ceramic Resonator
Xout
Cout
Xin
Cin
¨ èClock generator circuit by external clock
GND
Xout
Xin
Open
External Clock
FIG. 3.2.2. Clock Generation Circuit
¡ ÚWhen STOP Mode, Oscillation Stops,
Xin pin is High-Impedance, and Xout pin is going to High level state.
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