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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LAN8740Ai-EN датащи(PDF) 10 Page - Microchip Technology |
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LAN8740Ai-EN датащи(HTML) 10 Page - Microchip Technology |
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10 / 136 page  LAN8740A/LAN8740Ai DS00001987A-page 10 2013-2015 Microchip Technology Inc. Note 1: Configuration strap values are latched on power-on reset and system reset. Configuration straps are iden- tified by an underlined symbol name. Signals that function as configuration straps must be augmented with an external resistor when connected to a load. Refer to Section 3.7, "Configuration Straps" for additional information. 1 Collision Detect (MII Mode) COL VO8 This signal is asserted to indicate detection of a collision condition in MII mode. Carrier Sense / Receive Data Valid (RMII Mode) CRS_DV VO8 This signal is asserted to indicate the receive medium is non-idle in RMII mode. When a 10BASE-T packet is received, CRS_DV is asserted, but RXD[1:0] is held low until the SFD byte (10101011) is received. Note: Per the RMII standard, transmitted data is not looped back onto the receive data pins in 10BASE-T half-duplex mode. PHY Operat- ing Mode 2 Configuration Strap MODE2 VIS (PU) Combined with MODE0 and MODE1, this configu- ration strap sets the default PHY mode. See Note 1 for more information on configuration straps. Note: Refer to Section 3.7.2, "MODE[2:0]: Mode Configuration" for additional details. 1 Carrier Sense (MII Mode) CRS VO8 (PD) This signal indicates detection of a carrier in MII mode. TABLE 2-1: MII/RMII SIGNALS (CONTINUED) Num Pins Name Symbol Buffer Type Description |
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