Bt8370/8375/8376
3.12 Transmitter Registers
TPATT[1:0]
Fully Integrated T1/E1 Framer and Line Interface
PRBS test patterns used by RPATT [addr 041] and TPATT [addr 076] are defined in the ITU
standards O.151 and O.152 to use either inverted or non-inverted data. Bt8370/8375/8376 uses
standard data inversion for the selected PRBS test pattern unless ZLIMIT is enabled, in which
case the test pattern uses non-inverted data (see Table 3-21).
Table 3-21. Transmit PRBS Test Pattern
FRAMED
ZLIMIT
TPATT
00
Test Pattern
Inversion
No
11
15
20
23
11
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Unframed 2
Unframed 2
Unframed 2
Unframed 2
01
Yes
No
10
11
Yes
No
00
Unframed 2 with 7 zero limit
15
01
No
Unframed 2 with 7 zero limit
20
10
No
Unframed 2 with 14 zero limit (QRSS/QRS/QRTS)
23
11
No
Unframed 2 with 14 zero limit (non-std)
11
00
No
Framed 2
15
01
Yes
No
Framed 2
20
10
Framed 2
23
11
Yes
No
Framed 2
11
00
Framed 2 with 7 zero limit
15
01
No
Framed 2 with 7 zero limit (non std)
20
10
No
Framed 2 with 14 zero limit (QRSS/QRS/QRTS))
23
11
No
Framed 2 with 14 zero limit (non-std)
3-78
Conexant
N8370DSE
CONEXANT [ CONEXANT SYSTEMS, INC ]
