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LAN8804D Datasheet(PDF) 24 Page - Microchip Technology |
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LAN8804D Datasheet(HTML) 24 Page - Microchip Technology |
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24 / 89 page  LAN8804D DS00003591K-page 24 © 2026 Microchip Technology Inc. and its subsidiaries 3.3.5 LED POLARITY (PORT[3:0]_LED[2:1]_POL) The PORT[3:0]_LED[2:1]_POL configuration straps set the default polarity of the LED pins. When a LED pin is used as a function mode strap (for example a PHY address bit), the default LED pin polarity is automatically selected based on the inverse of the strap value. A LED, via a resistor, is then used as a pull-up or pull-down. This is shown in Figure 3-2. LED operation is described in Section 5.17, "LEDs". FIGURE 3-2: STRAP ON LED WITH POLARITY Functional Strap = 0 LED Output = Active High (LEDPOL Strap = 1) VDDIO Functional Strap = 1 LED Output = Active Low (LEDPOL Strap = 0) LED/Strap Pin LED/Strap Pin Supplemental resistor to ensure a valid low level during strap load 220 220 10 K 10 K Supplemental resistor to ensure a valid high level during strap load |
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