TLK6002 Datasheet, PDF (39/96 Pages) Texas Instruments – Dual Channel 0.47Gbps to 6.25Gbps Multi-Rate Transceiver

TLK6002
www.ti.com
SLLSE34 – MAY 2010
2.22.2 Receive Parallel Output Clock During ARS Mode
Per channel ARS_RX_CLK_EN (register bit 10.15) allows software programmability as to whether the
recovered output byte clock (RXCLK_A/B) is allowed to toggle (dynamically changing rates as the ARS
rate determination process executes), or if it is held fixed to zero until the incoming serial rate for the
channel has been determined. At the time rate determination is successful, the receive parallel output
interface clock is automatically allowed to toggle if it was prevented from toggling during ARS (and
enabling toggling is not delayed or gated by MDIO interaction in the case where ARS_TX_MDIO_GATE is
asserted).
No Comma
Reset | (6.6 & LOS(Loss of Signal))
Loss Of Sync
(Enable Alignment)
Sync Status Not Ok
Comma
Invalid Decode
Comma Detect 1
(Disable Alignment)
Comma
!Comma & !Invalid Decode
Invalid Decode
Comma Detect 2
Comma
!Comma & !Invalid Decode
Comma Detect 3
Invalid Decode
A
Comma
Sync Acquired 1
(Sync Status Ok)
Invalid
B _Decode
Sync Acquired 2
(good cgs = 0)
C
Invalid
Decode
Sync Acquired 3
(good cgs = 0)
Invalid
Decode
Sync Acquired 4
(good cgs = 0)
Invalid
Decode
!Comma & !Invalid Decode
Note:
If CH_SYNC_HYSTERESIS[1:0] (3.12:11) is equal to 2'b00),
machine operates as drawn.
If CH_SYNC_HYSTERESIS[1:0] (3.12:11) is equal to 2'b01/
2’b10/2'b11, then a transition from all Sync Acquired states
occurs immediately upon detection of 1, 2, or 3 adjacent
invalid code words or disparity errors respectively.
!Invalid
Decode
Invalid Decode
Sync Acquired 2A
good cgs++
!invalid Decode &
A _{good_cgs=3}
!Invalid Decode&
good_cgs !=3
!Invalid
Decode
Invalid Decode
Sync Acquired 3A
good cgs++
!invalid Decode &
B _{good_cgs=3}
!Invalid Decode &
good_cgs !=3
!Invalid
Decode
Invalid Decode
Sync Acquired 4A
good cgs++
!invalid Decode&
C _{good_cgs=3}
!Invalid Decode &
good_cgs !=3
Figure 2-14. Channel Synchronization Flowchart
Copyright © 2010, Texas Instruments Incorporated
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