TLK10031 Datasheet, PDF (33/146 Pages) Texas Instruments – TLK10031 Single-Channel XAUI/10GBASE-KR Transceiver

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TLK10031
SLLSEL3A – JULY 2015 – REVISED AUGUST 2015
7.4.9 Lane Alignment Operation
During lane alignment, the LAM sends a repeating pattern of 49 characters (control + data) simultaneously
across all enabled LS lanes. These simultaneous streams are then encoded by 8B/10B encoders in
parallel. The proprietary lane alignment pattern consists of the following characters:
/K28.5/ (CTL=1, Data=0xBC)
Repeat the following sequence of 12 characters four times:
/D30.5/ (CTL=0, Data=0xBE)
/D23.6/ (CTL=0, Data=0xD7)
/D3.1/ (CTL=0, Data=0x23)
/D7.2/ (CTL=0, Data=0x47)
/D11.3/ (CTL=0, Data=0x6B)
/D15.4/ (CTL=0, Data=0x8F)
/D19.5/ (CTL=0, Data=0xB3)
/D20.0/ (CTL=0, Data=0x14)
/D30.2/ (CTL=0, Data=0x5E)
/D27.7/ (CTL=0, Data=0xFB)
/D21.1/ (CTL=0, Data=0x35)
/D25.2/ (CTL=0, Data=0x59)
The above 49-character sequence is repeated until LS_OK_IN_A is asserted. Once LS_OK_IN_A is
asserted, the LAM resumes transmitting traffic received from the high speed side SERDES immediately.
The TLK10031 performs lane alignment across the lanes similar in fashion to the IEEE 802.3-2008 (XAUI)
specification. XAUI only operates across 4 lanes while LAS operates with 2 or 4 lanes. The lane alignment
state machine is shown in Figure 7-12. The TLK10031 uses the comma (K28.5) character for lane to lane
alignment by default, but can be provisioned to use XAUI's /A/ character as well.
Lane alignment checking is not performed by the LAS after lane alignment is achieved. After LAM detects
that the LS_OK_IN_A signal is asserted, normal system traffic is carried instead of the proprietary lane
alignment pattern.
Channel synchronization is performed during lane alignment and normal system operation.
Copyright © 2015, Texas Instruments Incorporated
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