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LAN8710A-EZC 데이터시트(PDF) 13 Page - SMSC Corporation |
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LAN8710A-EZC 데이터시트(HTML) 13 Page - SMSC Corporation |
13 / 82 page Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology Datasheet SMSC LAN8710A/LAN8710Ai 13 Revision 1.4 (08-23-12) DATASHEET Note 2.1 Configuration strap values are latched on power-on reset and system reset. Configuration straps are identified 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," on page 36 for additional information. 1 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. Collision Detect (MII Mode) COL VO8 This signal is asserted to indicate detection of a collision condition in MII Mode. PHY Operating Mode 2 Configuration Strap MODE2 VIS (PU) Combined with MODE0 and MODE1, this configuration strap sets the default PHY mode. See Note 2.1 for more information on configuration straps. Note: Refer to Section 3.7.2, "MODE[2:0]: Mode Configuration," on page 36 for additional details. 1 Carrier Sense (MII Mode) CRS VO8 (PD) This signal indicates detection of a carrier in MII Mode. Table 2.2 LED Pins NUM PINS NAME SYMBOL BUFFER TYPE DESCRIPTION 1 LED 1 LED1 O12 Link activity LED Indication. This pin is driven active when a valid link is detected and blinks when activity is detected. Note: Refer to Section 3.8.1, "LEDs," on page 39 for additional LED information. Regulator Off Configuration Strap REGOFF IS (PD) This configuration strap is used to disable the internal 1.2V regulator. When the regulator is disabled, external 1.2V must be supplied to VDDCR. When REGOFF is pulled high to VDD2A with an external resistor, the internal regulator is disabled. When REGOFF is floating or pulled low, the internal regulator is enabled (default). See Note 2.2 for more information on configuration straps. Note: Refer to Section 3.7.4, "REGOFF: Internal +1.2V Regulator Configuration," on page 38 for additional details. Table 2.1 MII/RMII Signals (continued) NUM PINS NAME SYMBOL BUFFER TYPE DESCRIPTION |
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