physical-layer (PHY) device from Texas Instruments (TI?) is a single-chip, high-performance solution for a range of 10BASE-T, 100BASE-TX, and 100BASE-FX networking systems (see Figure 1). The highly integrated TNETE2101
includes an on-board media-independent Interface
(MII) for simple connection to IEEE Std 802.3-compliant media-access controls (MACs). The device integrates all filtering and rise-time control functions for a cost-effective and space-saving PHY solution. Built-in autonegotiation allows automatic selection of half-/full-duplex 10BASE-T or 100BASE-TX, with an autopolarity-correction feature for immunity to receive-pair reversal.