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V62/12615-01XE-R 数据表(PDF) 21 Page - Texas Instruments |
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V62/12615-01XE-R 数据表(HTML) 21 Page - Texas Instruments |
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21 / 98 page ![]() RX_CLK RXD[3:0] RX_DV Valid data T2.12.2 T2.12.3 T2.12.1 T2.12.1 TX_CLK TXD[3:0] TX_EN Valid data T2.11.1 T2.11.1 T2.11.2 T211.3 21 DP83848-EP www.ti.com SLLSEC6E – SEPTEMBER 2012 – REVISED JUNE 2019 Submit Documentation Feedback Product Folder Links: DP83848-EP Specifications Copyright © 2012–2019, Texas Instruments Incorporated (1) An attached Mac should drive the transmit signals using the positive edge of TX_CLK. As shown above, the MII signals are sampled on the falling edge of TX_CLK. 4.7.11 10-Mbps MII Transmit Timing PARAMETER DESCRIPTION NOTES(1) MIN TYP MAX UNIT T2.11.1 TX_CLK high/low time 10-Mbps MII mode 190 200 210 ns T2.11.2 TXD[3:0], TX_EN data setup to TX_CLK fall 10-Mbps MII mode 24.70 ns T2.11.3 TXD[3:0], TX_EN data hold from TX_CLK rise 10-Mbps MII mode 0 ns (1) RX_CLK may be held low for a longer period of time during transition between reference and recovered clocks. Minimum high and low times will not be violated. Figure 4-12. 10-Mbps MII Transmit Timing 4.7.12 10-Mbps MII Receive Timing PARAMETER DESCRIPTION NOTES(1) MIN TYP MAX UNIT T2.12.1 RX_CLK high/low time 160 200 240 ns T2.12.2 RX_CLK to RXD[3:0], RX_DV delay 10-Mbps MII mode 100 ns T2.12.3 RX_CLK rising edge delay from RXD[3:0], RX_DV valid 10-Mbps MII mode 100 ns Figure 4-13. 10-Mbps MII Receive Timing |
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