DS3170 Maxim Integrated Products, DS3170 Datasheet - Page 71

• Manufacturer Part Number: DS3170
• Description: Network Controller & Processor ICs DS3-E3 Single-Chip T ransceiver T3-E3 Fra
• Manufacturer: Maxim Integrated Products

Figure 10-8. Transmit Error Insert Logic
10.5 Port Resources
10.5.1 Loopbacks
There are several loop back paths available. The following table lists the loopback modes available for analog
loopback (ALB), line loopback (LLB), payload loopback (PLB) and diagnostic loopback (DLB). The LBM bits are
located in
Table 10-17. Loopback Mode Selections
GL.CR1.MEIMS
LBM[2:0]
GL.CR1.TMEI
10X
000
001
010
011
110
111
GPIO6 PIN
PORT.CR4.
(TMEI)
PORT.CR.MEIMS
PORT.CR.TMEI
ALB
0
1
0
0
0
0
0
LLB
0
0
1
0
0
1
0
0
1
BERT.TEICR.MEIMS
PLB
BERT.TEICR error
0
0
0
1
0
0
0
0
1
insertion bit
DLB
0
0
0
0
1
1
1
71 of 230
T3.TEIR error
insertion bit
DS3170 DS3/E3 Single-Chip Transceiver
0
1
0
1
0
1
BERT ERROR
INSERT
T3.TEIR.MEIMS
T3 ERROR
INSERT