st62t18c STMicroelectronics, st62t18c Datasheet - Page 18

• Manufacturer Part Number: st62t18c
• Description: 8-bit Mcus With A/d Converter, Auto-reload Timer, Uart, Osg, Safe Reset And 20-pin Package
• Manufacturer: STMicroelectronics

ST62T18C/E18C
CLOCK SYSTEM (Cont’d)
Figure 9. OSG Filtering Principle
Figure 10. OSG Emergency Oscillator Principle
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Emergency
Frequency
Oscillator
Oscillator
Internal
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
Main
Resulting Internal Frequency
Maximum Frequency for the device to work correctly
Actual Quartz Crystal Frequency at OSCin pin
Noise from OSCin
VR001932
VR001933