TLK6002 Datasheet, PDF (29/96 Pages) Texas Instruments – Dual Channel 0.47Gbps to 6.25Gbps Multi-Rate Transceiver

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TDA_[19: 0]
T X CLK_ A
Shallow Remote Loopback (register 7 .2 )
Channel A
Parallel to
Serial
TLK6002
SLLSE34 – MAY 2010
TXAP
TXAN
RDA_[19: 0]
RXCLK_A
TDA_[19: 0]
T X CLK_ A
COMMA
Detect &
8B/ 10 B
Decoding
Serial to
Parallel
Channel A
Deep Remote Loopback (register 7 .3 )
Channel A
Parallel to
Serial
RXAP
RXAN
TXAP
TXAN
RDA_[ 19: 0]
RX CLK_ A
COMMA
Detect &
8B/ 10 B
Decoding
Serial to
Parallel
Channel A
RXAP
RXAN
Figure 2-10. TLK6002 Shallow and Deep Remote Loopback (Channel A)
2.17.1 Link Test Functions
The TLK6002 has an extensive suite of built in test functions to support system diagnostic requirements.
Each channel has an internal test pattern generator and verifier. Several patterns can be selected via the
MDIO that offer extensive test coverage. The test patterns supported are: 2⁷-1, 2²³-1, 2³¹-1 PRBS
(Pseudo Random Bit Stream), CRPAT Short/Long frequency patterns.
2.18 Serial Retime Mode
TLK6002 supports serial retime mode of operation. Serial retime mode is enabled through an mdio
register bit.
In serial retime mode mode:
• Incoming serial data on RXAP/N is sent to both RDA_[19:0] parallel and TXBP/N serial outputs.
• Incoming serial data on RXBP/N is sent to both RDB_[19:0] parallel and TXAP/N serial outputs.
In serial retime mode, the incoming serial data rate on Channel A must be synchronous (0 ppm) to the
reference clock supplied to Channel B SERDES. Also, the incoming serial data rate on Channel B must be
synchronous (0 ppm) to the reference clock supplied to Channel A SERDES.
Note that latency measurement is not possible when in serial retime mode of operation.
Figure 2-11 shows operation of TLK6002 in serial retime mode:
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