ST62T53C/T60C/T63C ST62E60C
CLOCK SYSTEM (Cont’d)
Figure 10. OSG Filtering Principle
(1)
(2)
(3)
(4)
(1) Maximum Frequency for the device to work correctly
(2) Actual Quartz Crystal Frequency at OSCin pin
(3) Noise from OSCin
(4) Resulting Internal Frequency
Figure 11. OSG Emergency Oscillator Principle
Main
Oscillator
Emergency
Oscillator
Internal
Frequency
20/84
VR001932
VR001933