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AM6546ACD 数据表(PDF) 167 Page - Texas Instruments |
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AM6546ACD 数据表(HTML) 167 Page - Texas Instruments |
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167 / 284 page  NO. PARAMETER DESCRIPTION MIN TYP MAX UNIT RMII2 tw(REF_CLKH) Pulse Duration, REF_CLK High 7 13 ns RMII3 tw(REF_CLKL) Pulse Duration, REF_CLK Low 7 13 ns RMII[x]_REFCLK (input) RMII2 RMII3 RMII1 Figure 7-33. RMII[x]_REFCLK Timing - RMII Mode 7.9.5.2.2.2 Timing Requirements for RMII[x]_RXD[1:0], RMII[x]_CRS_DV, and RMII[x]_RXER - RMII Mode NO. PARAMETER DESCRIPTION MIN TYP MAX UNIT RMII4 tsu(RXD-REF_CLK) Setup time, RXD[1:0] valid before REF_CLK 4 ns tsu(CRS_DV-REF_CLK) Setup time, CRS_DV valid before REF_CLK 4 ns tsu(RX_ER-REF_CLK) Setup time, RX_ER valid before REF_CLK 4 ns RMII5 th(REF_CLK-RXD) Hold time RXD[1:0] valid after REF_CLK 2 ns th(REF_CLK-CRS_DV) Hold time, CRS_DV valid after REF_CLK 2 ns th(REF_CLK-RX_ER) Hold time, RX_ER valid after REF_CLK 2 ns RMII4 RMII5 RMII[x]_RXD[1:0] RMII[x]_RXER , RMII[x]_CRS_DV, (inputs) SPRSP08_CPSW2G_RMIIRX RMII[x]_ (input) REFCLK Figure 7-34. RMII[x]_RXD[1:0], RMII[x]_CRS_DV, RMII[x]_RXER Timing - RMII Mode Section 7.9.5.2.2.3, and Section 7.9.5.2.2.3 present switching characteristics for CPSW2G RMII Transmit. 7.9.5.2.2.3 Switching Characteristics for RMII[x]_TXD[1:0], and RMII[x]_TXEN - RMII Mode NO. PARAMETER MIN TYP MAX UNIT RMII6 td(REF_CLK-TXD) Delay time, REF_CLK High to TXD[1:0] valid 2 13 ns td(REF_CLK-TXEN) Delay time, REF_CLK to TXEN valid 2 13 ns RMII[x]_TXD[1:0], RMII[x]_TX_EN RMII6 RMII[x]_REF_CLK Figure 7-35. RMII[x]_TXD[1:0], and RMII[x]_TX_EN Switching Characteristics – RMII Mode www.ti.com AM6548, AM6528, AM6546, AM6526 SPRSP52B – DECEMBER 2019 – REVISED JUNE 2021 Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 167 Product Folder Links: AM6548 AM6528 AM6546 AM6526 |
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