GMS34004 Datasheet, PDF (23/105 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 2. Architecture
Clock Generator
The GMS340 series has an internal clock oscillator. The oscillator circuit is
designed to operate with an external ceramic resonator. Internal capacitors are
available as a masked option. Oscillator circuit is able to organize by connecting
ceramic resonator to outside. (In order to built in capacitor for oscillation as
masked option.)
* It is necessary to connect capacitor to outside in order to change ceramic
resonator, You must examine refer to a manufacturer`s
OSC1
23
C1
OSC2
22
C2
<Circuit 1>
OSC1
23
OSC2
22
<Circuit 2>
Operating Frequency
f_OSC = 2.4 ~ 4MHz
f_OSC = 300 ~ 500KHz
Internal capacitor option
No Internal capacitor option
Oscillation Circuit
Circuit 1
Circuit 2
Circuit 1
2- 6