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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LXT970ATC датащи(PDF) 51 Page - Intel Corporation |
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LXT970ATC датащи(HTML) 51 Page - Intel Corporation |
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51 / 74 page  Dual-Speed Fast Ethernet Transceiver — LXT970A Datasheet 51 Figure 22. MII - 100BASE-TX Receive Timing / 4B Mode Table 31. MII - 100BASE-TX Receive Timing Parameters / 4B Mode Parameter Sym Min Typ 1 Max Units3 RXD, RX_DV, RX_ER Setup to RX_CLK High t1A 10 –– ns RXD, RX_DV, RX_ER Hold from RX_CLK High t1B 10 –– ns CRS asserted to RXD<3:0>, RX_DV asserted t1C – 8 – BT Receive start of “J” to CRS asserted t1D 0 15 - 19 20 BT Receive start of “T” to CRS de-asserted t1E 13 23 - 27 28 BT Receive start of “J” to COL asserted t1F 0 15 - 19 20 BT Receive start of “T” to COL de-asserted t1G 13 23 - 27 28 BT TRSTE asserted to RX_DV, RXD<3:0> driven2 t1H – 20 – ns 1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing. 2. These parameters apply only when the device is operated in Repeater Mode. 3. BT is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit rate. 100BASE-T bit time = 10- 8 s or 10 ns. t1D t1E t1C t1F t1G 0ns 250ns CRS TRSTE1 RX_DV RXD<3:0> RX_CLK COL t1A t1B TPIP t1H |
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