3X38FTR Datasheet, PDF (49/64 Pages) Agere Systems – OCTAL-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX

Preliminary Data Sheet
September 2000
3X38FTR 208-Pin SQFP
OCTAL-FET for 10Base-T/100Base-TX/FX
Register Information (continued)
Table 26. MR5—Autonegotiation Link Partner Ability (Base Page) Register Bit Descriptions
Bit*
Type^†
Description
5.15 (LP_NEXT_PAGE)
R Link Partner Next Page. When this bit is set to 1, it indicates that the link
partner wishes to engage in next page exchange.
5.14 (LP_ACK)
R Link Partner Acknowledge. When this bit is set to 1, it indicates that the
link partner has successfully received at least three consecutive and consis-
tent FLP bursts.
5.13 (LP_REM_FAULT)
R Remote Fault. When this bit is set to 1, it indicates that the link partner has
a fault.
5.12:5 (LP_TECH_ABILITY) R Technology Ability Field. This field contains the technology ability of the
link partner. These bits are similar to the bits defined for the MR4 register
(see Table 25).
5.4:0 (LP_SELECT)
R Selector Field. This field contains the type of message sent by the link part-
ner. For IEEE 802.3 compliant link partners, this field should read 00001.
* The format for the bit descriptions is as follows: the first number is the register number, the second number is the bit position in the register.
† R = read.
Table 27. MR5—Autonegotiation Link Partner (LP) Ability Register (Next Page) Bit Descriptions
Bit*
5.15 (LP_NEXT_PAGE)
5.14 (LP_ACK)
5.13 (LP_MES_PAGE)
5.12 (LP_ACK2)
5.11 (LP_TOGGLE)
5.10:0 (MCF)
Type^†
R
R
R
R
R
R
Description
Next Page. When this bit is set to a logic 0, it indicates that this is the last
page to be transmitted. A logic 1 indicates that additional pages will follow.
Acknowledge. When this bit is set to a logic 1, it indicates that the link
partner has successfully received its partner’s link code word.
Message Page. This bit is used by the NEXT _PAGE function to differenti-
ate a message page (logic 1) from an unformatted page (logic 0).
Acknowledge 2. This bit is used by the NEXT_PAGE function to indicate
that a device has the ability to comply with the message (logic 1) or not
(logic 0).
Toggle. This bit is used by the arbitration function to ensure synchroniza-
tion with the link partner during next page exchange. Logic 0 indicates that
the previous value of the transmitted link code word was logic 1. Logic 1
indicates that the previous value of the transmitted link code word was
logic 0.
Message/Unformatted Code Field. With these 11 bits, there are 2048
possible messages. Message code field definitions are described in annex
28C of the IEEE 802.3U standard.
* The format for the pin descriptions is as follows: the first number is the register number, the second number is the bit position in the register.
† R = read.
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