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STULPI01A 数据表(PDF) 25 Page - STMicroelectronics |
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STULPI01A 数据表(HTML) 25 Page - STMicroelectronics |
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25 / 44 page ![]() STULPI01A, STULPI01B Block description Doc ID 14817 Rev 4 25/44 Note: Software reset is not required in the startup procedure for the STULPI. The chip is ready for operation after the hardware reset procedure. 6.18.7 High-speed mode entry In High-speed mode, the internal 480-MHz clock is generated by the DLL, which must be calibrated any time the device enters High-speed mode by writing '00' to the XcvrSel field in the Function Control register. During the DLL calibration, it is not possible to accept any commands, therefore, to avoid any communication problems with the controller, the clock on the ULPI interface is stopped. See Figure 10 for more information. Figure 8. Startup sequence |
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