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MB91F464HB Datasheet(PDF) 25 Page - Cypress Semiconductor |
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MB91F464HB Datasheet(HTML) 25 Page - Cypress Semiconductor |
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25 / 105 page  Document Number: 002-04621 Rev. *A Page 25 of 105 MB91460H Series 5.6 Mode pins (MD_x) These pins should be connected directly to the power supply or ground pins. To prevent the device from entering test mode accidentally due to noise, minimize the lengths of the patterns between each mode pin and power supply pin or ground pin on the printed circuit board as possible and connect them with low impedance. 5.7 Notes on operating in PLL clock mode If the oscillator is disconnected or the clock input stops when the PLL clock is selected, the microcontroller may continue to operate at the free-running frequency of the self-oscillating circuit of the PLL. However, this self-running operation cannot be guaranteed. 5.8 Pull-up control The AC standard is not guaranteed in case a pull-up resistor is connected to the pin serving as an external bus pin. |
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