SPRUII0F May 2019 – June 2024 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
The RMII interface signals and descriptions are shown in Table 43-2 and Figure 43-2.
Signal | Type | Description |
---|---|---|
ENET_RMII_CLK | I/O | The reference clock is a continuous clock that provides the timing reference for transmit,receive operations. The ENET_MII_TX_DATA and ENET_MII_TX_EN signals are connected to this clock. The clock is generated by the PHY and is 5.0MHz at 10Mbps operation and 50MHz at 100Mbps operation. If External Clocking option is selected, this signal is input from the PHY/external device; if internal clock is selected, this signal is output. |
ENET_MII_TX_DATA[1:0] | O | The transmit data pins are a collection of 2 data signals, ENET_MII_TX_DATA[1:0], comprising 2 bits of data. ENET_MII_TX_DATA[0] is the least-significant bit. The signals are synchronized by ENET_RMII_CLK and valid only when ENET_MII_TX_EN is asserted. |
ENET_MII_TX_EN | O | The transmit enable signal indicates that the ENET_MII_TX_DATA[1:0] pins are generating 2-bit data for use by the PHY. This signal is driven synchronously by ENET_RMII_CLK. |
ENET_MII_RX_DV | I | Multiplexed signal between Carrier Sense and Receive Data Valid. |
ENET_MII_RX_DATA[1:0] | I | The receive data pins are a collection of 2 data signals comprising 2 bits of data. ENET_MII_RX_DATA[0] is the least-significant bit. The signals are synchronized by ENET_RMII_CLK and valid only when ENET_MII_RX_DV is asserted. |
ENET_MII_RX_ERR | I | Receive Error. The ENET_MII_RX_ERR signal is asserted to indicate that an error is detected in received frame. |
ENET_MDIO_CLK | O | Management data clock. The MDIO data clock is sourced by the MDIO module on the system. The clock is used to synchronize MDIO data access operations done on the ENET_MDIO_DATA pin. |
ENET_MDIO_DATA | I/O | The ENET_MDIO_DATA pin drives PHY management data into and out of the PHY by way of an access frame consisting of start of frame, read/write indication, PHY address, register address, and data bit cycles. The ENET_MDIO_DATA pin acts as an output for all but the data bit cycles at which time the pin is an input for read operations. |