ST6255C View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST6255C

8-bit MCUs with ADC, safe reset, auto-reload timer, EEPROM and SPI

STMicroelectronics 

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CLOCK SYSTEM (Cont’d)

Figure 9. OSG Filtering Principle

(1)

ST6255C ST6265C ST6265B

(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 10. OSG Emergency Oscillator Principle

Main

Oscillator

Emergency

Oscillator

Internal

Frequency

VR001932

VR001933

19/84

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