XR82C684
9.
Figure 29. Recommended Schematics for the XTAL Oscillator Circuitry
XR82C684
8
B4B;J
+ % &%
7 9 N & S 9
XR82C684
8
4.0.@;J
+ % &%
7 N & S 9
7
Note: The user also has an option to drive the Oscillator Circuit with a TTL input signal, in lieu of using a crystal oscillator.
If this approach is used, the TTL must be driven into the X1/CLK pin, and the X2 pin must be left floating.