43.19 FRC AC Electrical Specifications
| AC Characteristics | Standard Operating Conditions: VDDIO = VDDANA 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ TA ≤ +85°C for Industrial Temp-40°C ≤ TA ≤ +125°C for Extended Temp | ||||||
|---|---|---|---|---|---|---|---|
| Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
| FRC1 | FINTFREQ | Internal FRC frequency | — | 8 | — | MHz | Factory calibrated with tune bits set to 0x0 |
| FRC2 | TSUFRC | Start-up time of internal FRC | — | 15 | — | μs | — |
| FRC3 | FACCU | FRC accuracy | — | 5 | — | % | — |
| FRC5 | DUTY_CYCLE | FRC duty cycle | 45 | 50 | 55 | % | — |
| FRC6 | C_USE | FRC user tune | -1.625 | 6.299 | 1.615 | % |
Frequency drift = [ (Maximum frequency measured - Minimum frequency measured)/(Default frequency of 8 MHz) ] * 100; Maximum frequency drift possible by using the frequency trim bits |
| FRC7 | C_USER_STEP_SIZE | FRC user tune step size | 0.0467 | 0.046 | 0.0472 | % |
Step size = (% Drift across Osc tune)/(Total number of trim bit combinations); Change in frequency with incremental trim bit |
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Note: These parameters are characterized but not
tested in manufacturing.
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