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SPC5705BECLLR 数据表(PDF) 32 Page - Freescale Semiconductor, Inc |
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SPC5705BECLLR 数据表(HTML) 32 Page - Freescale Semiconductor, Inc |
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32 / 92 page ![]() MPC5607B Microcontroller Data Sheet, Rev. 3 Preliminary—Subject to Change Without Notice Electrical characteristics Freescale Semiconductor 32 3 This capacitance value is driven by the constraints of the external voltage regulator supplying the V DD_BV voltage. A typical value is in the range of 470 nF. 4 In case external ballast resistor is planned to be used, then to avoid a LVD reset during standby mode exit, the following configuration need to be respected. - for 8 ohm ballast resistor, decoupling cap of 33 µf is required. - for 4 ohm ballast resistor, decoupling cap of 14.7µf is required. These values are only after preliminary validation and are subject to change. 5 External regulator and capacitance circuitry must be capable of providing I DD_BV while maintaining supply VDD_BV in operating range. 6 In-rush current is seen only for short time during power-up and on standby exit (max 20µs, depending on external capacitances to be load) |
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