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MB9BF412RPMC-G-JNE2 数据表(PDF) 68 Page - Cypress Semiconductor |
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MB9BF412RPMC-G-JNE2 数据表(HTML) 68 Page - Cypress Semiconductor |
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68 / 112 page ![]() Document Number: 002-05615 Rev. *D Page 68 of 112 MB9B410R Series 12.4.2 Sub Clock Input Characteristics (VCC = 2.7V to 5.5V, VSS = 0V, TA = - 40°C to + 85°C) Parameter Symbol Pin name Conditions Value Unit Remarks Min Typ Max Input frequency 1/ tCYLL X0A X1A - - 32.768 - kHz When crystal oscillator is connected - 32 - 100 kHz When using external clock Input clock cycle tCYLL - 10 - 31.25 μs When using external clock Input clock pulse width - PWH/tCYLL PWL/tCYLL 45 - 55 % When using external clock 12.4.3 Internal CR Oscillation Characteristics High-speed Internal CR (VCC = 2.7V to 5.5V, VSS = 0V, TA = - 40°C to + 85°C) Parameter Symbol Conditions Value Unit Remarks Min Typ Max Clock frequency fCRH TA = + 25°C 3.96 4 4.04 MHz When trimming*1 TA = 0°C to + 70°C 3.84 4 4.16 TA = - 40°C to + 85°C 3.8 4 4.2 TA = - 40°C to + 85°C 3 4 5 When not trimming Frequency stability time tCRWT - - - 90 μs *2 *1: In the case of using the values in CR trimming area of Flash memory at shipment for frequency trimming. *2: Frequency stable time is time to stable of the frequency of the High-speed CR clock after the trim value is set. After setting the trim value, the period when the frequency stability time passes can use the High-speed CR clock as a source clock. Low-speed Internal CR (VCC = 2.7V to 5.5V, VSS = 0V, TA = - 40°C to + 85°C) Parameter Symbol Conditions Value Unit Remarks Min Typ Max Clock frequency fCRL - 50 100 150 kHz X0A |
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