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AM5728 Datasheet(PDF) 308 Page - Texas Instruments |
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AM5728 Datasheet(HTML) 308 Page - Texas Instruments |
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308 / 415 page  mii _txclk n 2 3 1 4 4 SPRS8xx_GMAC_MIITXCLK_02 mii _rxclk n 2 3 1 4 4 SPRS8xx_GMAC_MIIRXCLK_01 308 AM5729, AM5728, AM5726 SPRS953F – DECEMBER 2015 – REVISED MAY 2019 www.ti.com Submit Documentation Feedback Product Folder Links: AM5729 AM5728 AM5726 Timing Requirements and Switching Characteristics Copyright © 2015–2019, Texas Instruments Incorporated Table 7-68. Timing Requirements for miin_rxclk - MII Operation (continued) NO. PARAMETER DESCRIPTION SPEED MIN MAX UNIT 3 tw(RX_CLKL) Pulse duration, miin_rxclk low 10 Mbps 140 260 ns 100 Mbps 14 26 ns 4 tt(RX_CLK) Transition time, miin_rxclk 10 Mbps 3 ns 100 Mbps 3 ns Figure 7-51. Clock Timing (GMAC Receive) - MIIn operation Table 7-69 and Figure 7-52 present timing requirements for MIIn in transmit operation. Table 7-69. Timing Requirements for miin_txclk - MII Operation NO. PARAMETER DESCRIPTION SPEED MIN MAX UNIT 1 tc(TX_CLK) Cycle time, miin_txclk 10 Mbps 400 ns 100 Mbps 40 ns 2 tw(TX_CLKH) Pulse duration, miin_txclk high 10 Mbps 140 260 ns 100 Mbps 14 26 ns 3 tw(TX_CLKL) Pulse duration, miin_txclk low 10 Mbps 140 260 ns 100 Mbps 14 26 ns 4 tt(TX_CLK) Transition time, miin_txclk 10 Mbps 3 ns 100 Mbps 3 ns Figure 7-52. Clock Timing (GMAC Transmit) - MIIn operation Table 7-70 and Figure 7-53 present timing requirements for GMAC MIIn Receive 10/100Mbit/s. Table 7-70. Timing Requirements for GMAC MIIn Receive 10/100 Mbit/s NO. PARAMETER DESCRIPTION MIN MAX UNIT 1 tsu(RXD-RX_CLK) Setup time, receive selected signals valid before miin_rxclk 8 ns tsu(RX_DV-RX_CLK) tsu(RX_ER-RX_CLK) 2 th(RX_CLK-RXD) Hold time, receive selected signals valid after miin_rxclk 8 ns th(RX_CLK-RX_DV) th(RX_CLK-RX_ER) |
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