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MC9S08QA2CEDNE Datasheet(PDF) 11 Page - Freescale Semiconductor, Inc |
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MC9S08QA2CEDNE Datasheet(HTML) 11 Page - Freescale Semiconductor, Inc |
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11 / 32 page  Electrical Characteristics MC9S08QA4 Series MCU Data Sheet, Rev. 3 Freescale Semiconductor 11 3.7 Internal Clock Source (ICS) Characteristics 1 3 V values are 100% tested; 2 V values are characterized but not tested. 2 Typicals are measured at 25 °C. 3 Does not include any DC loads on port pins. 4 Most customers are expected to find that auto-wakeup from a stop mode can be used instead of the higher current wait mode. Table 8. ICS Specifications (Temperature Range = –40 to 85 °C Ambient) Characteristic Symbol Min Typical1 1 Data in Typical column was characterized at 3.0 V, 25 °C, or is typical recommended value. Max Unit Internal reference start-up time tIRST —60 100 μs Average internal reference frequency — untrimmed fint_ut 25 32.7 41.66 kHz Average internal reference frequency — trimmed fint_t 31.25 — 39.06 kHz DCO output frequency range — untrimmed fdco_ut 12.8 16.8 21.33 MHz DCO output frequency range — trimmed fdco_t 16 — 20 MHz Resolution of trimmed DCO output frequency at fixed voltage and temperature2 2 This parameter is characterized and not tested on each device. Δf dco_res_t — ±0.1 ±0.2 %fdco Total deviation of DCO output from trimmed frequency2 At 8 MHz over full voltage and temperature range At 8 MHz and 3.6 V from 0 to 70 °C Δf dco_t — –1.0 to 0.5 ±0.5 ±2 ±1 %fdco FLL acquisition time 2,3 3 This specification applies to any time the FLL reference source or reference divider is changed, trim value changed. tAcquire —— 1.5 ms Long term jitter of DCO output clock (averaged over 2 ms interval) CJitter —0.02 0.2 %fdco |
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