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SPEAR600 Folha de dados(PDF) 82 Page - STMicroelectronics |
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SPEAR600 Folha de dados(HTML) 82 Page - STMicroelectronics |
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82 / 97 page  Timing characteristics SPEAr600 82/97 Doc ID 16259 Rev 3 6.6.3 GMII-MII Receive timing specifications Figure 37. GMII-MII RX waveforms Figure 38. Block diagram of GMII-MII RX pins Note: The input stage is the same for all the interfaces (GMII and MII10/100) so tSETUP and tHOLD values are equal in all the cases. The receive path is optimized for the GMII interface: this also ensures correct capture of data for the MII10/100 interface. Table 52. GMII-MII RX timings Parameter Value using GMII [tCLK period = 8 ns 125 MHz] Value using MII 100Mb [tCLK period = 40 ns 25 MHz] Value using MII 10 Mb [tCLK period = 400 ns 2.5 MHz] tSETUPmax (tS)= t2max - t1min 2.26 ns 2.26 ns 2.26 ns t HOLDmin (tH)= t2min - t1max -0.11 ns -0.11 ns -0.11 ns RXD0-RXD3, GMIIRX_D4-GMIIRX_D7, RX_ER, RX_DV RX_CLK Ts Th Tclock Tr Tf t1 Q Q SET CLR D t2 RX[0..3], GMII_RX[4..7], RX_ER, RX_DV RX_CLK |
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