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MB91F525FHDPMC 数据表(PDF) 144 Page - Cypress Semiconductor |
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MB91F525FHDPMC 数据表(HTML) 144 Page - Cypress Semiconductor |
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144 / 280 page  Document Number: 002-04662 Rev. *F Page 144 of 280 MB91520 Series Oscillation clock frequency vs. Internal operation clock frequency Internal operation clock frequency Main Clock PLL clock Multiplied by 1 Multiplied by 2 Multiplied by 3 Multiplied by 4 ... Multiplied by 19 Multiplied by 20 Oscillation clock frequency 4 MHz 2 MHz 4 MHz 8 MHz 12 MHz 16 MHz ... 76 MHz 80 MHz Example of oscillation circuit X1 X0 R=0Ω C2=10pF C1=10pF 4MHz Note: As to the product with its clock supervisor ’s initial value is “ON”, when the oscillator is unable to start within 20 ms from the stop state the clock supervisor will detect the oscillation stop. As a result, the CPU moves to the fail safe operation. Design your print circuit board so that the oscillator can start oscillation within 20 ms. Moreover, it is recommended to be designed after the match evaluation of the circuit is requested to the departure pendulum maker when the oscillation circuit is composed. |
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