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BCM5238 Datasheet(PDF) 41 Page - Broadcom Corporation. |
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BCM5238 Datasheet(HTML) 41 Page - Broadcom Corporation. |
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41 / 76 page  Advance Data Sheet BCM5238 1/31/03 Broa d c om Co rp o r a t i o n Document 5238-DS03-405-R Auto-Negotiation Advertisement Register Page 33 AUTO-NEGOTIATION LINK PARTNER (LP) ABILITY REGISTER Note that the values contained in the Auto-Negotiation Link Partner Ability Register are only guaranteed to be valid once auto-negotiation has successfully completed, as indicated by bit 5 of the MII Status 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 BCM5248 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 BCM5248 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. LP Advertise Bits. Bits 9:5 of the Link Partner Ability register reflect the abilities of the link partner. A 1 on any of these bits indicates that the link partner is capable of performing the corresponding mode of operation. Bits 9:5 are cleared any time auto-negotiation is restarted or the BCM5238 is reset. LP Selector Field. Bits 4:0 of the Link Partner Ability register reflect the value of the link partner’s selector field. These bits are cleared any time auto-negotiation is restarted or the chip is reset. Table 22: 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 Note: 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). |
Similar Part No. - BCM5238_05 |
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Similar Description - BCM5238_05 |
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