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ST92196A датащи(PDF) 226 Page - STMicroelectronics |
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ST92196A датащи(HTML) 226 Page - STMicroelectronics |
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226 / 268 page ![]() 226/268 ELECTRICAL CHARACTERISTICS AC ELECTRICAL CHARACTERISTICS (Cont’d) CLOCK TIMING (VDD = 5V ± 10% TA = -10°C + 75°C, unless otherwise specified) EXTERNAL INTERRUPT TIMING (Rising or falling edge mode; VDD = 5V ± 10%; TA = -10°C + 75°C, unless otherwise specified) Note: The value in the left hand two columns shows the formula used to calculate the minimum or maximum timing from the oscillator clock period, prescale value and number of wait cycles inserted. The value in the rignt hand two columns shows the minimum and maximum for an external clock at 24 MHz divided by 2, prescale value of zero and zero wait status. EXTERNAL INTERRUPT TIMING Symbol Parameter Conditions Value Unit Min Max TpC OSCIN Clock Period intern. div. by 2 41.7 ns intern. div. by 1 83.3 ns TrC OSCIN rise time 12 ns TfC OSCIN fall time 12 ns TwCL OSCIN low width intern. div. by 2 17 ns intern. div. by 1 38 ns TwCH OSCIN high width intern. div. by 2 17 ns intern. div. by 1 38 ns N° Symbol Parameter Conditions Unit OSCIN Divided by 2 Min. OSCIN Not Divided by 2 Min. Min Max 1 TwLR Low Level Minimum Pulse width in Rising Edge Mode 2TpC + 12 TpC + 12 95 ns 2 TwHR High Level Minimum Pulse width in Rising Edge Mode 2TpC + 12 TpC + 12 95 ns 3 TwLF Low Level Minimum Pulse width in Falling Edge Mode 2TpC + 12 TpC + 12 95 ns 4 TwHF High Level Minimum Pulse width in Falling Edge Mode 2TpC + 12 TpC + 12 95 ns INTn 1 23 4 RISING EDGE DETECTION FALLING EDGE DETECTION n = 0-7 VA00112 |
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