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SPEAR320S 데이터시트(PDF) 87 Page - STMicroelectronics |
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SPEAR320S 데이터시트(HTML) 87 Page - STMicroelectronics |
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87 / 113 page ![]() SPEAr320S Timing requirements Doc ID 022508 Rev 2 87/113 Note: When MDIO is used as output the data are launched on the falling edge of the clock as shown in Figure 19. 5.8 Ethernet RMII timing characteristics 5.8.1 RMII transmit timing characteristics Figure 20. RMII TX waveform Table 62. RMII TX timing requirements 5.8.2 RMII receive timing characteristics Figure 21. RMII RX waveform Symbol Description Min Max Unit tCK RMII_REF_CLK period 20 ns tD Clock to RMII0_TXD output delay 4.28 15.65 Clock to RMII1_TXD output delay 4.20 15.45 RMII_REF_CLK RMIIn_TXD0, RMIIn_TXD1 RMIIn_TX_EN Tf Tr TCKhigh TCKlow TD RMII_REF_CLK Th TCKhigh TCKlow Tf Tr Ts RMIIn_RXD0, RMIIn_RXD1 RMIIn_CRS_DV |
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