Fujitsu MB86617A 12.4. Configuration of Feedback Circuit at Crystal Oscillator ,

LSI Specification
MB86617A
Rev.1.0 Fujitsu VLSI
134
12.4. Configuration of Feedback Circuit at Crystal Oscillator
The example of configuration of feedback circuit at crystal oscillator is shown below.
No outside resistance is needed because the feedback resistance is built-in.???
Figure 12.4 Configuration of feedback circuit at crystal oscillator
XO
XI
20pF
20pF