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MK68901 Datasheet(PDF) 23 Page - STMicroelectronics |
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MK68901 Datasheet(HTML) 23 Page - STMicroelectronics |
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23 / 33 page  TIMER A.C. CHARACTERISTICS Definitions : Error = Indicated Time Value - Actual Time Value tpsc = tCLKx Prescale Value Internal Timer Mode Single Interval Error (free running) (note 2) ± 100ns Cumulative Internal Error 0 Error between Two Timer Reads ± (tpsc + 4tCLK) Start Timer to Stop Timer Error + (2tCLK + 100ns) to - (tpsc + 6tCLK + 100ns) Start Timer to Read Timer Error + 0 to – (tpsc + 6t CLK + 400ns) Start Timer to Interrupt Request Error (note 3) - 2t CLK to – (4tCLK + 800ns) Notes : 1. Error may be cumulative if repetitively performed. 2. Error with respect to TOUT or INT if note 3 is true. 3. Assuming it is possible for the timer to make an interrupt request immediately. PULSE WIDTH MEASUREMENT MODE Measurement Accuracy (note 1) + 2tCLK to – (tpsc + 4tCLK) Minimum Pulse Width 4tCLK EVENT COUNTER MODE Minimum Active Time of TAI, TBI 4tCLK Minimum Inactive Time of TAI, TBI 4tCLK MK68901 23/33 |
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