5-10
Configuration Options
information but it is no longer accessible by software. After reading the
base page information, software needs to write to the
AutoNegotiation
Next Page Transmit Register (ANNPTR) Address 0x07
to load the next
page information to be sent. Software must then continue to poll the
page received bit in the ANER and, when active, read the ANLPAR. The
contents of the ANLPAR register indicate if the partner has further pages
to be sent. As long as the partner has more pages to send, software
must write to the next page transmit register and load another page.
The
AutoNegotiate Expansion Register (ANER) Address 0x06
indicates
additional AutoNegotiation status. The ANER provides status on:
Whether a Parallel Detect Fault has occurred (bit 4, register address
0x06).
Whether the Link Partner supports the Next Page function (bit 3,
register address 0x06).
Whether the L80600 supports the Next Page function (bit 2, register
address 0x06 (the L80600 supports the Next Page function).
Whether the current page being exchanged by AutoNegotiation has
been received (bit1, register address 0x06).
Whether the Link Partner supports AutoNegotiation (bit 0, register
address 0x06).
The
AutoNegotiation Next Page Transmit Register (ANNPTR)
Address 0x07
contains the next page code word to be sent.
5.3.7 AutoNegotiation Parallel Detection
The L80600 supports the Parallel Detection function as defined in the
IEEE 802.3u specification. Parallel Detection requires the 10/100 Mbits/s
receivers to monitor the receive signal and report link status to the
AutoNegotiation function. AutoNegotiation uses this information to
configure the correct technology in the event that the Link Partner does
not support AutoNegotiation, yet is transmitting link signals that the
10BASE-T or 100BASE-X PMA recognize as valid link signals.
If the L80600 completes AutoNegotiation as a result of Parallel Detection,
without Next Page operation, bits 5 and 7 within the ANLPAR register
(address 0x05) 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 0b00001