SNLS638A December 2018 – August 2019 DP83825I
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 DP83825I supports 100BASE-TX and 10BASE-Te modes of operation for Auto-Negotiation. Auto-Negotiation ensures that the highest common speed 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 bootstrap, or by register 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.