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AM2434...ALV 数据表(PDF) 150 Page - Texas Instruments |
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AM2434...ALV 数据表(HTML) 150 Page - Texas Instruments |
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150 / 280 page  7.10.5.1.2 CPSW3G RMII Timing Table 7-22, Table 7-23, Figure 7-23, Table 7-24, Figure 7-24 Table 7-25, and Figure 7-25 present timing conditions, requirements, and switching characteristics for CPSW3G RMII. Table 7-22. CPSW3G RMII Timing Conditions PARAMETER MIN MAX UNIT INPUT CONDITIONS SRI Input slew rate VDD(1) = 1.8V 0.18 0.54 V/ns VDD(1) = 3.3V 0.4 1.2 V/ns OUTPUT CONDITIONS CL Output load capacitance 3 25 pF (1) VDD stands for corresponding power supply. For more information on the power supply name and the corresponding ball(s), see POWER column of the Pin Attributes table. Table 7-23. RMII[x]_REF_CLK Timing Requirements – RMII Mode see Figure 7-23 NO. PARAMETER DESCRIPTION MIN MAX UNIT RMII1 tc(REF_CLK) Cycle time, RMII[x]_REF_CLK 19.999 20.001 ns RMII2 tw(REF_CLKH) Pulse Duration, RMII[x]_REF_CLK High 7 13 ns RMII3 tw(REF_CLKL) Pulse Duration, RMII[x]_REF_CLK Low 7 13 ns RMII[x]_REF_CLK RMII2 RMII3 RMII1 Figure 7-23. CPSW3G RMII[x]_REF_CLK Timing Requirements – RMII Mode Table 7-24. RMII[x]_RXD[1:0], RMII[x]_CRS_DV, and RMII[x]_RX_ER Timing Requirements – RMII Mode see Figure 7-24 NO. PARAMETER DESCRIPTION MIN MAX UNIT RMII4 tsu(RXD-REF_CLK) Setup time, RMII[x]_RXD[1:0] valid before RMII[x]_REF_CLK 4 ns tsu(CRS_DV-REF_CLK) Setup time, RMII[x]_CRS_DV valid before RMII[x]_REF_CLK 4 ns tsu(RX_ER-REF_CLK) Setup time, RMII[x]_RX_ER valid before RMII[x]_REF_CLK 4 ns RMII5 th(REF_CLK-RXD) Hold time RMII[x]_RXD[1:0] valid after RMII[x]_REF_CLK 2 ns th(REF_CLK-CRS_DV) Hold time, RMII[x]_CRS_DV valid after RMII[x]_REF_CLK 2 ns th(REF_CLK-RX_ER) Hold time, RMII[x]_RX_ER valid after RMII[x]_REF_CLK 2 ns RMII4 RMII5 RMII[x]_ _ REF CLK RMII[x]_RXD[1:0], RMII[x]_CRS_DV, RMII[x]_RX_ER Figure 7-24. CPSW3G RMII[x]_RXD[1:0], RMII[x]_CRS_DV, RMII[x]_RX_ER Timing Requirements – RMII Mode AM2434, AM2432, AM2431 SPRSP65D – APRIL 2021 – REVISED AUGUST 2022 www.ti.com 150 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: AM2434 AM2432 AM2431 |
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