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V62/12615-01XE-R датащи(PDF) 15 Page - Texas Instruments |
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V62/12615-01XE-R датащи(HTML) 15 Page - Texas Instruments |
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15 / 98 page ![]() T2.2.4 T2.2.1 32 clocks T2.2.2 T2.2.3 Input Output V CC X1 clock Hardware RESET_N MDC Latch-in of hardware configuration pins Dual function pins become enabled as outputs 15 DP83848-EP www.ti.com SLLSEC6E – SEPTEMBER 2012 – REVISED JUNE 2019 Submit Documentation Feedback Product Folder Links: DP83848-EP Specifications Copyright © 2012–2019, Texas Instruments Incorporated (1) It is important to choose pullup and/or pulldown resistors for each of the hardware configuration pins that provide fast RC time constants in order to latch-in the proper value prior to the pin transitioning to an output driver. 4.7.2 Reset Timing PARAMETER DESCRIPTION NOTES(1) MIN TYP MAX UNIT T2.2.1 Post RESET stabilization time prior to MDC preamble for register accesses MDIO is pulled high for 32-bit serial management initialization. 3 µs T2.2.2 Hardware configuration latch-in time from the deassertion of RESET (either soft or hard) Hardware configuration pins are described in Section 3 and Table 3-8. 3 µs T2.2.3 Hardware configuration pins transition to output drivers 50 ns T2.2.4 RESET pulse width X1 clock must be stable for at min. of 1 µs during RESET pulse low time. 1 µs Figure 4-3. Reset Timing |
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