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51 lines
921 B
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51 lines
921 B
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The following PHY connections are required for RMII PHY data connections:
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.. list-table:: RMII PHY Wiring
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:widths: 10 25 25 75
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:header-rows: 1
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* - GPIO
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- RMII Signal
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- ESP32 EMAC Function
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- Notes
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* - 0 / 16 / 17
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- REF_CLK
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- EMAC_TX_CLK
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- See desciption about the clock
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* - 18
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- MDIO
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- EMAC_MDIO
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- In theory user configurable, but almost always used as MDIO pin
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* - 23
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- MDC
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- EMAC_MDC
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- In theory user configurable, but almost always used as MDC pin
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* - 21
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- TX_EN
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- EMAC_TX_EN
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-
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* - 19
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- TX0
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- EMAC_TXD0
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-
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* - 22
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- TX1
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- EMAC_TXD1
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-
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* - 25
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- RX0
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- EMAC_RXD0
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-
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* - 26
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- RX1
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- EMAC_RXD1
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-
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* - 27
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- CRS_DV
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- EMAC_RX_DRV
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-
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See `ESP32 datasheet <https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf>`_
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