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ST72321 データシート(PDF) 148 Page - STMicroelectronics |
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ST72321 データシート(HTML) 148 Page - STMicroelectronics |
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148 / 185 page  ST72321 148/185 CLOCK AND TIMING CHARACTERISTICS (Cont’d) Notes: 1. Resonator characteristics given by the ceramic resonator manufacturer. 2. tSU(OSC) is the typical oscillator start-up time measured between VDD=2.8V and the fetch of the first instruction (with a quick VDD ramp-up from 0 to 5V (<50µs). 3. Resonators all have different characteristics. Contact the manufacturer to obtain the appropriate values of external components and to verify oscillator performance. 4. 3rd overtone resonators require specific validation by the resonator manufacturer. Oscil. Typical Ceramic Resonators (information for guidance only) CL1 [pF] CL2 [pF] tSU(osc) [ms] 2) Reference3) Freq. Characteristic 1) LP CSA2.00MG 2MHz ∆f OSC=[±0.5%tolerance,±0.3% ∆Ta,±0.3%aging,±x.x%correl]22 22 4 MP CSA4.00MG 4MHz ∆f OSC=[±0.5%tolerance,±0.3% ∆Ta,±0.3%aging,±x.x%correl]22 22 2 MS CSA8.00MTZ 8MHz ∆f OSC=[±0.5%tolerance,±0.5% ∆Ta,±0.3%aging,±x.x%correl]33 33 1 HS CSA16.00MXZ0404) 16MHz ∆f OSC=[±0.5%tolerance,±0.3% ∆Ta,±0.3%aging,±x.x%correl] 33 33 0.7 |
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