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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC5200 датащи(PDF) 45 Page - Freescale Semiconductor, Inc |
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MPC5200 датащи(HTML) 45 Page - Freescale Semiconductor, Inc |
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45 / 80 page  Electrical and Thermal Characteristics MPC5200 Data Sheet, Rev. 4 Freescale Semiconductor 45 Figure 29. Ethernet Timing Diagram—MII Tx Signal Figure 30. Ethernet Timing Diagram—MII Async Table 32. MII Tx Signal Timing Sym Description Min Max Unit SpecID M5 TX_CLK rising edge to TXD[3:0], TX_EN, TX_ER Delay 025 ns A9.5 M6 TX_CLK pulse width high 35% 65% TX_CLK Period1 NOTES: 1 the TX_CLK frequency shall be 25% of the nominal transmit frequency, e.g., a PHY operating at 100 Mb/s must provide a TX_CLK frequency of 25 MHz and a PHY operating at 10 Mb/s must provide a TX_CLK frequency of 2.5 MHz. See the IEEE 802.3 Specification [6]. A9.6 M7 TX_CLK pulse width low 35% 65% TX_CLK Period(1) A9.7 Table 33. MII Async Signal Timing Sym Description Min Max Unit SpecID M8 CRS, COL minimum pulse width 1.5 — TX_CLK Period A9.8 M7 M6 M5 TX_CLK (Input) TXD[3:0] (Outputs) TX_EN TX_ER M8 CRS, COL |
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