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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LAN8820 bảng dữ liệu(PDF) 8 Page - Microchip Technology |
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LAN8820 bảng dữ liệu(HTML) 8 Page - Microchip Technology |
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8 / 83 page  LAN8820/LAN8820I DS00001871B-page 8 2009-2015 Microchip Technology Inc. Note 2-2 Configuration strap values are latched on hardware 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 3.8, "Configuration," on page 23 for additional information. 1 Configuration Input 2 CONFIG2 IS (PD) This pin sets the MOD[1:0] bits of the Extended Mode Control/Status Register on reset or power- up. It must be connected to VSS, 100_LED, 1000_LED, or VDD25IO. Refer to Section 3.8.1.2, "CONFIG[3:0] Configuration Pins," on page 24 for additional information. 1 Configuration Input 3 CONFIG3 IS (PD) This pin sets the MOD[3] bit of the Extended Mode Control/Status Register on reset or power-up. It must be connected to 1000_LED. Refer to Section 3.8.1.2, "CONFIG[3:0] Configuration Pins," on page 24 for additional information. TABLE 2-4: ETHERNET PINS Num Pins Name Symbol Buffer Type Description 1 Ethernet TX/ RX Positive Channel 0 TR0P AIO Transmit/Receive Positive Channel 0. 1 Ethernet TX/ RX Negative Channel 0 TR0N AIO Transmit/Receive Negative Channel 0. 1 Ethernet TX/ RX Positive Channel 1 TR1P AIO Transmit/Receive Positive Channel 1. 1 Ethernet TX/ RX Negative Channel 1 TR1N AIO Transmit/Receive Negative Channel 1. 1 Ethernet TX/ RX Positive Channel 2 TR2P AIO Transmit/Receive Positive Channel 2. 1 Ethernet TX/ RX Negative Channel 2 TR2N AIO Transmit/Receive Negative Channel 2. 1 Ethernet TX/ RX Positive Channel 3 TR3P AIO Transmit/Receive Positive Channel 3. 1 Ethernet TX/ RX Negative Channel 3 TR3N AIO Transmit/Receive Negative Channel 3. 1 External PHY Bias Resistor ETHRBIAS AI Used for the internal bias circuits. Connect to an external 8.06K 1.0% resistor to ground. TABLE 2-3: LED & CONFIGURATION PINS (CONTINUED) Num Pins Name Symbols Buffer Type Description |
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