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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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ST7LITE49M Scheda tecnica(PDF) 155 Page - STMicroelectronics |
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ST7LITE49M Scheda tecnica(HTML) 155 Page - STMicroelectronics |
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155 / 188 page  ST7LITE49M Electrical characteristics 155/188 13.6.1 Auto Wake Up from Halt oscillator (AWU) 13.6.2 Crystal and ceramic resonator oscillators The ST7 internal clock can be supplied with ten different Crystal/Ceramic resonator oscillators. All the information given in this paragraph are based on characterization results with specified typical external components. In the application, the resonator and the load capacitors have to be placed as close as possible to the oscillator pins in order to minimize output distortion and start-up stabilization time. Refer to the crystal/ceramic resonator manufacturer for more details (frequency, package, accuracy...). Figure 73. Typical application with a crystal or ceramic resonator Table 80. AWU from Halt characteristics Symbol Parameter(1) 1. Guaranteed by Design. Not tested in production. Conditions Min Typ Max Unit fAWU AWU Oscillator Frequency 16 32 64 kHz tRCSRT AWU Oscillator startup time 50 µs Table 81. Crystal/ceramic resonator oscillator characteristics Symbol Parameter Conditions Min Typ Max Unit fCrOSC Crystal Oscillator Frequency 2 16 MHz CL1 CL2 Recommended load capacitance versus equivalent serial resistance of the crystal or ceramic resonator (RS) TBD(1) 1. TBD stands for ‘to be determined’. pF OSC2 OSC1 fOSC CL1 CL2 i2 ST7LITE49M RESONATOR WHEN RESONATOR WITH INTEGRATED CAPACITORS Rd |
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