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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SPEAR1340 датащи(PDF) 166 Page - STMicroelectronics |
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SPEAR1340 датащи(HTML) 166 Page - STMicroelectronics |
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166 / 200 page  Timing characteristics SPEAr1340 166/200 Doc ID 023063 Rev 4 5.7.4 MII receive timing characteristics The timing characterization is performed assuming an input transition of 2 ns on all the inputs. These timings are valid for 10 and 100 Mbps operation. Figure 28. MII RX timing waveform Table 75. MII TX timing characteristics Symbol Description Min Max Unit TCLK MAC_TXCLK clock period 40 – ns TCLKhigh MAC_TXCLK pulse high 12 – ns TCLKlow MAC_TXCLK pulse low 12 – ns TD MAC_TXCLK to MII output data 5.1 18 ns Table 76. MII RX timing characteristics Symbol Description Min Max Unit TCLK MAC_RXCLK clock period 40 – ns TCLKhigh MAC_RXCLK pulse high 12 – ns TCLKlow MAC_RXCLK pulse low 12 – ns Ts Setup time for MII receive data 3.8 ns Th Hold time for MII receive data 0 Th MAC_RXCLK (input) MAC_RXD0-MAC_RXD3, MAC_RXER, MAC_RXDV TCLKhigh TCLKlow Ts |
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