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DRA821U4...ALM 数据表(PDF) 149 Page - Texas Instruments |
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DRA821U4...ALM 数据表(HTML) 149 Page - Texas Instruments |
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149 / 252 page ![]() NO. PARAMETER DESCRIPTION MODE MIN TYP MAX UNIT RGMII7 tt(RD) Transition time, RD 10Mbps 0.75 ns 100Mbps 0.75 ns 1000Mbps 0.75 ns tt(RX_CTL) Transition time, RX_CTL 10Mbps 0.75 ns 100Mbps 0.75 ns 1000Mbps 0.75 ns RGMII[x] RD 3 _ [ :0] (B) RGMII[x] RX_CTL _ (B) RGMII[x] RXC _ (A) RGMII4 RXERR RXDV 2nd Half-byte 1st Half-byte RGMII2 RGMII3 RGMII1 RGMII5 A. RGMII_RXC must be externally delayed relative to the data and control pins. B. Data and control information is received using both edges of the clocks. RGMII_RXD[3:0] carries data bits 3-0 on the rising edge of RGMII_RXC and data bits 7-4 on the falling edge of RGMII_RXC. Similarly, RGMII_RXCTL carries RXDV on rising edge of RGMII_RXC and RXERR on falling edge of RGMII_RXC. Figure 7-42. CPSW2G Receive Interface Timing, RGMII Operation Section 7.9.5.2.2.3, Section 7.9.5.2.2.4, and Figure 7-43 present switching characteristics for transmit - RGMII for 10 Mbps, 100 Mbps, and 1000 Mbps. 7.9.5.2.2.3 Switching Characteristics for RGMII[x]_TCLK – RGMII Mode NO. PARAMETER DESCRIPTION MODE MIN TYP MAX UNIT RGMII1 tc(TXC) Cycle time, TXC 10Mbps 360 440 ns 100Mbps 36 44 ns 1000Mbps 7.2 8.8 ns RGMII2 tw(TXCH) Pulse duration, TXC high 10Mbps 160 240 ns 100Mbps 16 24 ns 1000Mbps 3.6 4.4 ns RGMII3 tw(TXCL) Pulse duration, TXC low 10Mbps 160 240 ns 100Mbps 16 24 ns 1000Mbps 3.6 4.4 ns RGMII4 tt(TXC) Transition time, TXC 10Mbps 0.75 ns 100Mbps 0.75 ns 1000Mbps 0.75 ns www.ti.com DRA821U-Q1 SPRSP57D – APRIL 2020 – REVISED DECEMBER 2022 Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 149 Product Folder Links: DRA821U-Q1 |
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