SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
ESC devices with Ethernet Physical Layer are able to support MII interfaces, RMII interfaces, and EBUS interfaces. Since RMII PHYs include TX FIFOs, the RMII PHYs increase the packet forwarding delay of an ESC device as well as the jitter. RMII as an Ethernet Physical Layer is not supported on this device due to these reasons and therefore only the MII interface is supported.
Table 26-3 depicts the number of pins needed for MII interface for two ports.
Pin | Number of Pins for 2 Ports |
MII | Direction | Description |
---|---|---|---|---|
nMII_Link | 2 | Yes | IN | Input signal provided by the PHY, if a 100Mbps (full duplex) link is established |
RX_CLK | 2 | Yes | IN | Receive Clock |
RX_DV | 2 | Yes | IN | Receive Data valid |
RX_DATA[1:0] | 4 | Yes | IN | Receive Data |
RX_DATA[3:2] | 4 | Yes | IN | Receive Data |
RX_ERR | 2 | Yes | IN | Receive error |
TX_CLK(1) | 2 | Optional | IN | Transmit Clock |
TX_ENA | 2 | Yes | OUT | Transmit Enable |
TX_DATA[1:0] | 4 | Yes | OUT | Transmit Data |
TX_DATA[3:2] | 4 | Yes | OUT | Transmit Data |
MCLK | 1 | Yes | OUT | MII Interface clock |
MDIO | 1 | Yes | BI-Directional | MII Interface Data |
Total Pins: | 28 (required) + 2 (optional) |