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AM79C874VC Datasheet(PDF) 52 Page - Advanced Micro Devices |
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AM79C874VC Datasheet(HTML) 52 Page - Advanced Micro Devices |
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52 / 60 page  52 Am79C874 P R E L I M INARY 10 Mbps MII Transmit Timing Figure 22. 10 Mbps MII Transmit Start of Packet Timing Symbol Parameter Description Min. Max. Unit tMTS10 TX_EN, TXD10[3:0] Setup Time to TX_CLK Rising Edge 12 - ns tMTH10 TX_EN, TXD10[3:0] Hold time From TX_CLK Rising Edge 0 - ns tMTEP10 Transmit Latency TX_EN Sampled by TX_CLK to Start of Packet 240 360 ns tMTECRH10 CRS Assert from TX_EN Sampled HIGH - 130 ns tMTECOH10 COL Assert from TX_EN Sampled HIGH - 300 ns tMTDCRL10 CRS De-assert From TX_EN Sampled LOW - 130 ns tMTDCOL10 COL De-assert From TX_EN Sampled LOW - 130 ns tMTIDLE10 Required De-assertion Time Between Packets 300 - ns tMTP10 TX_CLK Period 399.98 400.02 ns tMTWH10 TX_CLK HIGH 180 220 ns tMTWL10 TX_CLK LOW 180 220 ns TX_CLK tMTS10 TX± tMTECRH10 tMTECLH10 tMTEP10 tMTH100 tMTS10 TX_EN CRS COL TXD[3:0] tMTP10 tMTWH10 tMTWL10 22235I-24 |
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