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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) 55 Page - Intel Corporation |
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LXT970ATC датащи(HTML) 55 Page - Intel Corporation |
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55 / 74 page  Dual-Speed Fast Ethernet Transceiver — LXT970A Datasheet 55 Figure 26. MII - 100BASE-FX Receive Timing / 4B Mode Table 35. MII - 100BASE-FX Receive Timing Parameters / 4B Mode Parameter Sym Min Typ 1 Max Units3 RXD, RX_DV, RX_ER Setup to RX_CLK High t5A 10 –– ns RXD, RX_DV, RX_ER Hold from RX_CLK High t5B 10 –– ns CRS asserted to RXD<3:0>, RX_DV asserted t5C – 8 – BT Receive start of “J” to CRS asserted t5D 0 13 - 17 20 BT Receive start of “T” to CRS de-asserted t5E 13 21 - 25 26 BT Receive start of “J” to COL asserted t5F 0 13 - 17 20 BT Receive start of “T” to COL de-asserted t5G 13 21 - 25 26 BT TRSTE asserted to RX_DV, RXD<3:0> driven2 t5H – 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. t5H1 t5D t5E t5C t5F t5G 0ns 250ns CRS TRSTE1 RX_DV RXD<3:0> RX_CLK COL t5A t5B Note 2 FIBIP 1. These parameters apply only when the device is operated in Repeater Mode. 2. In Repeater Mode, application circuit must assert TRSTE within time period specified by t4 - t10. |
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