w65c134s Western Design Center, Inc., w65c134s Datasheet - Page 56

• Manufacturer Part Number: w65c134s
• Description: W65c134s 8-bit Microcontroller
• Manufacturer: Western Design Center, Inc.

5.3
The following circuit is a possible clocking system for the W65C134S providing both 32.768KHz and 2.0MHz
frequencies.
W65C134S's internal timers.
In constructing this oscillator circuit, components should be kept as physically close to the W65C134S as
possible and any excess in component leads should be trimmed off.
Note:
1.
2.
Recommended clock and fclock oscillators
Depending on trace layout or construction techniques used, values may need to be altered slightly.
Pin numbers only apply to PLCC package only.
The 32.768KHz clock is well suited for setting up a time of day clock with one of the
C1 = 47pF
C2 = 27pF
C3 = 22pF
C4 = 5-30pF variable
XTAL1 = 4 MHz
Figure 5-7 Oscillator Circuit
R0 = 100Ω
R1 = 800KΩ
R2 = 2.6MΩ
R3 = 150KΩ
XTA L2= 32.768 KHz
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