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ST90135 数据表(PDF) 179 Page - STMicroelectronics |
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ST90135 数据表(HTML) 179 Page - STMicroelectronics |
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179 / 190 page  179/190 ST90158 - ELECTRICAL CHARACTERISTICS EXTERNAL INTERRUPT TIMING TABLE (VDD =5V ± 10%, TA =-40°C +85°C, Cload = 50pF, INTCLK = 12MHz, Push-pull output configuration, un- less otherwise specified) Note: The value left hand two columns show the formula used to calculate the timing minimum or maximum from the oscillator clock period, prescale value and number of wait cycles inserted. The value right hand two columns show the timing minimum and maximum for an external clock at 24 MHz divided by 2, prescale value of zero and zero wait status. EXTERNAL INTERRUPT TIMING N ° Symbol Parameter Value (Note) Unit OSCIN Divided by2Min. OSCIN Not Divided by 2 Min. Min. Max. 1TwLR Low Level Minimum Pulse Width in Rising Edge Mode 2TpC+12 TpC+12 95 ns 2TwHR High Level Minimum Pulse Width in Rising Edge Mode 2TpC+12 TpC+12 95 ns 3TwHF High Level Minimum Pulse Width in Falling Edge Mode 2TpC+12 TpC+12 95 ns 4TwLF Low Level Minimum Pulse Width in Falling Edge Mode 2TpC+12 TpC+12 95 ns 1 |
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