ZHCSFD6G july 2016 – august 2023 DP83822H , DP83822HF , DP83822I , DP83822IF
PRODUCTION DATA
The Media Independent Interface is a synchronous 4-bit wide nibble data interface that connects the PHY to the MAC in 100BASE-FX, 100BASE-TX and 10BASE-Te modes. The MII is fully compliant with IEEE 802.3-2002 clause 22.
The MII signals are summarized below:
| FUNCTION | PINS |
|---|---|
| Data Signals | TX_D[3:0] |
| RX_D[3:0] | |
| Transmit and Receive Signals | TX_EN |
| RX_DV | |
| Line-Status Signals | CRS |
| COL |
Figure 8-4 MII SignalingAdditionally, the MII interface includes the carrier sense signal (CRS), as well as a collision detect signal (COL). The CRS signal asserts to indicate the reception or transmission of data. The COL signal asserts as an indication of a collision which can occur during Half-Duplex mode when both transmit and receive operations occur simultaneously.