SNLS484H February 2015 – June 2024 DP83867CR , DP83867IR
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The DP83867 supports the Parallel Detection function as defined in the IEEE 802.3 specification. Parallel Detection requires the 10/100Mbps receivers to monitor the receive signal and report link status to the Auto-Negotiation function. Auto-Negotiation uses this information to configure the correct technology in the event that the Link Partner does not support Auto-Negotiation, yet is transmitting link signals that the 10BASE-Te or 100BASE-X PMA recognize as valid link signals.
If the DP83867 completes Auto-Negotiation as a result of Parallel Detection, without Next Page operation, bits 5 and 7 of ANLPAR (register address 0x0005) are set to reflect the mode of operation present in the Link Partner. Note that bits 4:0 of the ANLPAR are also set to 00001 based on a successful parallel detection to indicate a valid 802.3 selector field. Software may determine that the negotiation is completed through Parallel Detection by reading 0 in bit 0 of ANER (register address 0x006) after Auto-Negotiation Complete, bit 5 of BMSR (register address 0x0001), is set. If the PHY is configured for parallel detect mode and any condition other than a good link occurs, the parallel detect fault, bit 4 of ANER (register address 0x06), sets.