 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ST6215C Datasheet(PDF) 74 Page - STMicroelectronics |
|
||||||||||||||||||||||||||||||
ST6215C Datasheet(HTML) 74 Page - STMicroelectronics |
|
|
74 / 105 page 
ST6215C/ST6225C 74/105 CLOCK AND TIMING CHARACTERISTICS (Cont’d) 11.5.3 Crystal and Ceramic Resonator Oscillators The ST6 internal clock can be supplied with sever- al different Crystal/Ceramic resonator oscillators. Only parallel resonant crystals can be used. All the information given in this paragraph are based on characterization results with specified typical ex- ternal components. Refer to the crystal/ceramic resonator manufacturer for more details (frequen- cy, package, accuracy...). Notes: 1. Resonator characteristics given by the crystal/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. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small RS value. Refer to crystal/ceramic resonator manufacturer for more details. Figure 50. Typical Application with a Crystal or Ceramic Resonator Symbol Parameter Conditions Typ Unit RF Feedback resistor 3 M Ω CL1 CL2 Recommended load capacitances versus equiva- lent crystal or ceramic resonator frequency fOSC=32 kHz, fOSC=1 MHz fOSC=2 MHz fOSC=4 MHz fOSC=8 MHz 120 47 33 33 22 pF Oscillator Typical Crystal or Ceramic Resonators CL1 [pF] CL2 [pF] tSU(osc) [ms] 1) Reference Freq. Characteristic 1) CSB455E 455KHz ∆f OSC=[±0.5KHztolerance,±0.3% ∆Ta,±0.5%aging] 220 220 CSB1000J 1MHz ∆f OSC=[±0.5KHztolerance,±0.3% ∆Ta,±0.5%aging] 100 100 CSTCC2.00MG0H6 2MHz ∆f OSC=[±0.5%tolerance,±0.5% ∆Ta,±0.3%aging]47 47 CSTCC4.00MG0H6 4MHz ∆f OSC=[±0.5%tolerance,±0.3% ∆Ta,±0.3%aging]47 47 CSTCC8.00MG 8MHz ∆f OSC=[±0.5%tolerance,±0.3% ∆Ta,±0.3%aging]15 15 OSCOUT OSCIN CL1 CL2 RF ST62XX RESONATOR VDD FOSC 1 |
English ▼
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
