ST62T32B ST62E32B
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
20/86
124
VR001932
VR 0019 33