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DRA821U4...ALM 数据表(PDF) 148 Page - Texas Instruments |
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DRA821U4...ALM 数据表(HTML) 148 Page - Texas Instruments |
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148 / 252 page ![]() RMII[x]_TXD[1:0], RMII[x]_TXEN (outputs) SPRSP08_CPSW2G_RMIITX RMII6 RMII7 RMII[x]_REFCLK (input) RMII8 Figure 7-41. SPI Master Mode Receive Timing 7.9.5.2.2 CPSW2G RGMII Timings Section 7.9.5.2.2.1, Section 7.9.5.2.2.2, and Figure 7-42 present timing requirements for receive RGMII operation. 7.9.5.2.2.1 Timing Requirements for RGMII[x]_RCLK – RGMII Mode NO. PARAMETER DESCRIPTION MODE MIN TYP MAX UNIT RGMII1 tc(RXC) Cycle time, RXC 10Mbps 360 440 ns 100Mbps 36 44 ns 1000Mbps 7.2 8.8 ns RGMII2 tw(RXCH) Pulse duration, RXC high 10Mbps 160 240 ns 100Mbps 16 24 ns 1000Mbps 3.6 4.4 ns RGMII3 tw(RXCL) Pulse duration, RXC low 10Mbps 160 240 ns 100Mbps 16 24 ns 1000Mbps 3.6 4.4 ns RGMII4 tt(RXC) Transition time, RXC 10Mbps 0.75 ns 100Mbps 0.75 ns 1000Mbps 0.75 ns 7.9.5.2.2.2 Timing Requirements for RGMII[x]_RD[3:0], and RGMII[x]_RCTL – RGMII Mode NO. PARAMETER DESCRIPTION MODE MIN TYP MAX UNIT RGMII5 tsu(RD-RXC) Setup time, RD[3:0] valid before RXC high/low 10Mbps 1 ns 100Mbps 1 ns 1000Mbps 1 ns tsu(RX_CTL-RXC) Setup time, RX_CTL valid before RXC high/low 10Mbps 1 ns 100Mbps 1 ns 1000Mbps 1 ns RGMII6 th(RXC-RD) Hold time, RD[3:0] valid after RXC high/low 10Mbps 1 ns 100Mbps 1 ns 1000Mbps 1 ns th(RXC-RX_CTL) Hold time, RX_CTL valid after RXC high/low 10Mbps 1 ns 100Mbps 1 ns 1000Mbps 1 ns DRA821U-Q1 SPRSP57D – APRIL 2020 – REVISED DECEMBER 2022 www.ti.com 148 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: DRA821U-Q1 |
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