TLK10002
www.ti.com
SLLSE75 –MAY 2011
Deep Local Loopback
The deep local loopback mode is as shown in Figure 14 for Channel A. The configuration is the same for
Channel B. The loopback mode is activated and configured through the MDIO interface. In this loopback mode,
the data is accepted on the low speed side SERDES pins (INA*P/N or INB*P/N), traverses the entire transmit
data path excluding the CML driver, returned through the entire receive data path and sent out through the low
speed side SERDES pins (OUTA*P/N or OUTB*P/N). The TLK10002 device needs some time for lane alignment
before passing traffic. The high speed side outputs on HSTXAP/N or HSTXBP/N pins are available for
monitoring.
10
16
16
32
INA0P/N
LS PRBS
Verifier
TX FIFO
10
HSTXAP /N
20
20
HS PRBS
Generator
16
INA1P/N
INA2P/N
1
0
Pattern
Generator
10
INA3P/N
High
Speed
Side
Low
Speed
Side
10
16
OUTA0P/N
OUTA1P/N
32
SERDES
SERDES
RX FIFO
10
10
OUTA2P/N
OUTA3P/N
HS PRBS
Verifier
LS PRBS
Generator
10
HSRXAP /N
Pattern
Verifier
Figure 14. Deep Local Loopback
Shallow Local Loopback
The shallow local loopback mode is as shown in Figure 15 for Channel A. The configuration is the same for
Channel B. The loopback mode is activated and configured through the MDIO interface. In this loopback mode,
the data is accepted on the low speed side SERDES pins (INA*P/N or INB*P/N), traverses the entire transmit
data path excluding the high speed side SERDES, returned through the entire receive data path and sent out
through the low speed side SERDES pins (OUTA*P/N or OUTB*P/N). The TLK10002 device needs some time
for lane alignment before passing traffic. The high speed side outputs on HSTXAP/N or HSTXBP/N pins are
available for monitoring.
10
16
16
32
INA0P/N
LS PRBS
Verifier
TX FIFO
10
HSTXAP /N
20
20
HS PRBS
Generator
16
INA1P/N
INA2P/N
1
0
Pattern
Generator
10
INA3P/N
High
Speed
Side
Low
Speed
Side
10
16
OUTA0P/N
OUTA1P/N
32
SERDES
SERDES
RX FIFO
10
10
OUTA2P/N
OUTA3P/N
HS PRBS
Verifier
LS PRBS
Generator
10
HSRXAP /N
Pattern
Verifier
Figure 15. Shallow Local Loopback
Copyright © 2011, Texas Instruments Incorporated
21
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