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AM5728 Datasheet(PDF) 315 Page - Texas Instruments |
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AM5728 Datasheet(HTML) 315 Page - Texas Instruments |
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315 / 415 page  rgmii _rxd[3:0] n (B) rgmii _rxctl n (B) rgmii _rxc n (A) 5 RXERR RXDV 1st Half-byte 2nd Half-byte RGRXD[7:4] RGRXD[3:0] 2 3 1 4 4 6 SPRS8xx_GMAC_MIIRX_08 315 AM5729, AM5728, AM5726 www.ti.com SPRS953F – DECEMBER 2015 – REVISED MAY 2019 Submit Documentation Feedback Product Folder Links: AM5729 AM5728 AM5726 Timing Requirements and Switching Characteristics Copyright © 2015–2019, Texas Instruments Incorporated (1) For RGMII, receive selected signals include: rgmiin_rxd[3:0] and rgmiin_rxctl. A. rgmiin_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. rgmiin_rxd[3:0] carries data bits 3-0 on the rising edge of rgmiin_rxc and data bits 7-4 on the falling edge ofrgmiin_rxc. Similarly, rgmiin_rxctl carries RXDV on rising edge of rgmiin_rxc and RXERR on falling edge of rgmiin_rxc. Figure 7-58. GMAC Receive Interface Timing, RGMIIn operation Table 7-85, Table 7-86 and Figure 7-59 present switching characteristics for transmit - RGMIIn for 10/100/1000Mbit/s. Table 7-85. Switching Characteristics Over Recommended Operating Conditions for rgmiin_txctl - RGMIIn Operation for 10/100/1000 Mbit/s NO. PARAMETER DESCRIPTION SPEED MIN MAX UNIT 1 tc(TXC) Cycle time, rgmiin_txc 10 Mbps 360 440 ns 100 Mbps 36 44 ns 1000 Mbps 7.2 8.8 ns 2 tw(TXCH) Pulse duration, rgmiin_txc high 10 Mbps 160 240 ns 100 Mbps 16 24 ns 1000 Mbps 3.6 4.4 ns 3 tw(TXCL) Pulse duration, rgmiin_txc low 10 Mbps 160 240 ns 100 Mbps 16 24 ns 1000 Mbps 3.6 4.4 ns 4 tt(TXC) Transition time, rgmiin_txc 10 Mbps 0.75 ns 100 Mbps 0.75 ns 1000 Mbps 0.75 ns Table 7-86. Switching Characteristics for GMAC RGMIIn Output Transmit for 10/100/1000 Mbps (1) NO. PARAMETER DESCRIPTION MODE MIN MAX UNIT 5 tosu(TXD-TXC) Output Setup time, transmit selected signals valid to rgmiin_txc high/low RGMII0, Internal Delay Enabled, 1000 Mbps 1.05 (2) ns RGMII0, Internal Delay Enabled, 10/100 Mbps 1.2 ns RGMII1, Internal Delay Enabled, 1000 Mbps 1.05 (3) ns RGMII1, Internal Delay Enabled, 10/100 Mbps 1.2 ns |
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