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ST62T53CM3 датащи(PDF) 21 Page - STMicroelectronics |
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ST62T53CM3 датащи(HTML) 21 Page - STMicroelectronics |
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21 / 83 page ![]() 21/83 ST6253C ST6263C ST6263B ST6260C ST6260B CLOCK SYSTEM (Cont’d) Figure 12. Clock Circuit Block Diagram Figure 13. Maximum Operating Frequency (fMAX) versus Supply Voltage (VDD) Notes: 1. In this area, operation is guaranteed at the quartz crystal frequency. 2. When the OSG is disabled, operation in this area is guaranteed at the crystal frequency. When the OSG is enabled, operation in this area is guar- anteed at a frequency of at least fOSG Min. 3. When the OSG is disabled, operation in this area is guaranteed at the quartz crystal frequency. When the OSG is enabled, access to this area is prevented. The internal frequency is kept a fOSG. 4. When the OSG is disabled, operation in this area is not guaranteed When the OSG is enabled, access to this area is prevented. The internal frequency is kept at fOSG. MAIN OSCILLATOR OSG LFAO M U X Core : 13 : 12 : 1 TIMER 1 Watchdog POR fINT Main Oscillator off OSCILLATOR DIVIDER RS0,RS1 1 2.5 3.644.555.5 6 8 7 6 5 4 3 2 Maximum FREQUENCY (MHz) SUPPLY VOLTAGE (VDD) 3 4 3 2 1 fOSG fOSG Min (at 85°C) VR01807J fOSG Min (at 125°C) |
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