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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC855 датащи(PDF) 66 Page - Motorola, Inc |
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MPC855 датащи(HTML) 66 Page - Motorola, Inc |
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66 / 76 page  66 MPC860 Family Hardware Specifications MOTOROLA FEC Electrical Characteristics Figure 12-68. UTOPIA Receive Timing Figure 12-69 shows signal timings during UTOPIA transmit operations. Figure 12-69. UTOPIA Transmit Timing Part XIII FEC Electrical Characteristics This section provides the AC electrical specifications for the Fast Ethernet controller (FEC). Note that the timing specifications for the MII signals are independent of system clock frequency (part speed designation). Also, MII signals use TTL signal levels compatible with devices operating at either 5.0 V or 3.3 V. UtpClk UTPB RxEnb U1 3 2 SOC 4 RxClav PHREQn 3 4 HighZ at MPHY HighZ at MPHY U1 U5 U3 U4 U4 U3 U2 UtpClk UTPB TxEnb 1 2 SOC 5 TxClav PHSELn 3 4 5 HighZ at MPHY HighZ at MPHY U1 U1 U5 U5 U2 U3 U4 |
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