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DP83847 датащи(PDF) 51 Page - National Semiconductor (TI) |
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DP83847 датащи(HTML) 51 Page - National Semiconductor (TI) |
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51 / 60 page ![]() 51 www.national.com 6.4.6 100BASE-TX Receive Packet Latency Timing Note: Carrier Sense On Delay is determined by measuring the time from the first bit of the “J” code group to the assertion of Carrier Sense. Note: RD ± voltage amplitude is greater than the Signal Detect Turn-On Threshold Value. 6.4.7 100BASE-TX Receive Packet Deassertion Timing Note: Carrier Sense Off Delay is determined by measuring the time from the first bit of the “T” code group to the deasser- tion of Carrier Sense. Parameter Description Notes Min Typ Max Units T4.6.1 Carrier Sense ON Delay 17.5 bit times T4.6.2 Receive Data Latency 21 bit times Parameter Description Notes Min Typ Max Units T4.7.1 Carrier Sense OFF Delay 21.5 bit times CRS RXD[3:0] RD ± RX_DV RX_ER/RXD[4] IDLE Data T4.6.1 T4.6.2 (J/K) CRS T4.7.1 RXD[3:0] RX_DV RX_ER/RXD[4] RD ± DATA IDLE (T/R) |
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