BCM5722 Programmer’s Guide
10/15/07
Broadcom Corporation
Page 489 Transceiver Registers (BCM5906/BCM5906M) Document 5722-PG101-R
Resetting the chip restores the default bit values. Reading the register returns the values last written to the corresponding
bits, or else the default values if no write has been completed since the last chip reset.
Advertise Selector Field
Bits 4:0 of the Advertisement register contain the value 00001, indicating that the chip belongs to the 802.3 class of PHY
transceivers.
Auto-negotiation Link Partner (LP) Ability Register
LP Next Page
Bit 15 of the Link Partner Ability register returns a value of 1 when the link partner implements the Next Page function and
has Next Page information that it wants to transmit. The PHY core does not implement the Next Page function, and thus
ignores the Next Page bit, except to copy it to this register.
LP Acknowledge
Bit 14 of the Link Partner Ability register is used by auto-negotiation to indicate that a device has successfully received its
link partner’s link code word.
LP Remote Fault
Bit 13 of the Link Partner Ability register returns a value of 1 when the link partner signals that a remote fault has occurred.
The PHY core simply copies the value to this register and does not act upon it.
Reserved Bits
Ignore when read.
LP Advertise Pause
Indicates that the link partner pause bit is set.
Table 542: Auto-Negotiation Link Partner Ability Register (Address 05d, 05h)
Bit Name R/W Description Default
15 LP Next Page RO Link partner Next Page bit 0
14 LP Acknowledge RO Link partner acknowledge bit 0
13 LP Remote Fault RO Link partner remote fault indicator 0
12:11 Reserved Technologies RO Ignore when read 000
10 LP Advertise Pause RO Link partner has pause capability 0
9 LP Advertise 100BASE-T4 RO Link partner has 100BASE-T4 capability 0
8 LP Advertise 100BASE-X FDX RO Link partner has 100BASE-X FDX capability 0
7 LP Advertise 100BASE-X RO Link partner has 100BASE-X capability 0
6 LP Advertise 10BASE-T FDX RO Link partner has 10BASE-T FDX capability 0
5 LP Advertise 10BASE-T RO Link partner has 10BASE-T capability 0
4:0 Link Partner Selector Field RO Link partner selector field 00000
R/W = Read/Write, RO = Read only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL and LH Clear after read
operation. Use default values of reserved bit(s) when writing to reserved bit(s).
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