Auto-Negotiation provides a mechanism for exchanging configuration information between the two ends of a link segment. This mechanism is implemented by exchanging Fast Link Pulses (FLP). FLPs are burst pulses that provide the information used to communicate the abilities between two devices at each end of a link segment. The DP83822 supports 100BASE-TX and 10BASE-Te modes of operation for Auto-Negotiation. 100BASE-FX is not included in the Auto-Negotiation process. Auto-Negotiation ensures that the highest performance protocol is selected based on the advertised abilities of the Link Partner and the local device. Auto-Negotiation can be enabled or disabled in hardware, using the AN_EN bootstrap, or by regsiter configuration, using bit in the Basic Mode Control Register (BMCR, address 0x0000). For further details regarding Auto-Negotiation, refer to Clause 28 of the IEEE 802.3 specification.