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USB5906C/KD 数据表(PDF) 18 Page - Microchip Technology |
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USB5906C/KD 数据表(HTML) 18 Page - Microchip Technology |
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18 / 64 page  2016-2021 Microchip Technology Inc. DS00002242E-page 18 USB5906 Reset Control Input RESET_N IS Reset Control Input This pin places the hub into Reset Mode when pulled low. Bias Resistor RBIAS I-R A 12.0 k Ω (+/- 1%) resistor is attached from ground to this pin to set the transceiver’s internal bias settings. Place the resistor as close to the device as possible with a dedicated, low impedance connection to the GND plane. External 25 MHz Crystal Input XTALI ICLK External 25 MHz crystal input External 25 MHz Reference Clock Input CLKIN ICLK External reference clock input. The device may alternatively be driven by a single-ended clock oscillator. When this method is used, XTALO should be left unconnected. External 25 MHz Crystal Output XTALO OCLK External 25 MHz crystal output Test TESTEN I/O12 Test pin. This signal is used for test purposes and must always be connected to ground. No Connect NC - No connect. For proper operation, this signal must be left uncon- nected. TABLE 3-7: MISCELLANEOUS PIN DESCRIPTIONS (CONTINUED) Name Symbol Buffer Type Description |
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