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AM79C874VC 数据表(PDF) 54 Page - Advanced Micro Devices |
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AM79C874VC 数据表(HTML) 54 Page - Advanced Micro Devices |
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54 / 60 page ![]() 54 Am79C874 P R E L I M INARY 10 Mbps MII Receive Timing Figure 24. 10 Mbps MII Receive Start of Packet Timing Symbol Parameter Description Min. Max. Unit tMRPCRH10 CRS HIGH After Start of Packet 80 150 ns tMRPCOH10 COL HIGH After Start of Packet 80 150 ns tMRCHR10 RXD[3:0], RX_DV, RX_ER Valid after CRS HIGH 100 100 ns tMRRC10 RXD[3:0], RX_DV, RX_ER Valid Prior to the Rising of RX_CLK10 16 - ns tMRCRD10 RXD[3:0], RX_DV, RX_ER Valid After the Rising Edge of RX_CLK 12 - ns tMRECRL10 End of Packet to CRS LOW 130 190 ns tMRECOL10 End of Packet to COL LOW 125 185 ns tMRERL10 End of Packet to RXD[3:0], RX_DV, RX_ER De-Asserting (Going LOW) 120 140 ns RX± CRS COL RX_DV RX_CLK RXD[3:0] RX_ER tMRPCRH10 tMRRC10 tMRCR10 tMRPCOH10 tMRCHR10 22235I-26 |
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