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VSC8540RT 数据表(PDF) 77 Page - Microchip Technology |
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VSC8540RT 数据表(HTML) 77 Page - Microchip Technology |
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77 / 87 page ![]() 2022 Microchip Technology Inc. and its subsidiaries DS60001603E-page 77 VSC8540RT FIGURE 8-10: SERIAL MANAGEMENT INTERFACE TIMING 8.4.13 RESET TIMING This section contains the AC specifications that apply to device reset functionality. The signal applied to the NRESET input must comply with the specifications listed in the following table. TABLE 8-30: RESET TIMING AC CHARACTERISTICS Parameter Symbol Minimum Typical Maximum Unit NRESET assertion time after power supplies and clock stabilize tW 2ms Recovery time from reset inactive to device fully active tREC 15 ms NRESET pulse width tW(RL) 100 ns Wait time between NRESET de-assert and access of the SMI interface tWAIT 15 ms tCYC tWL tWH tSU tH tCO Data Data MD IO (read) MD IO (w rite) MDC |
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