3.0 Registers
CX28394/28395/28398
3.12 Transmitter Registers
Quad/x16/Octal—T1/E1/J1 Framers
Table 3-21. Transmit PRBS Test Pattern Measurements
FRAMED
ZLIMIT
TPATT
Test Pattern Measurements
Inversion
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
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
Unframed 2^11
No
Yes
No
Yes
No
No
No
No
No
Yes
No
Yes
No
No
No
No
Unframed 2^15
Unframed 2^20
Unframed 2^23
Unframed 2^11 with 7 zero limit
Unframed 2^15 with 7 zero limit
Unframed 2^20 with 14 zero limit (QRSS/QRS/QRTS)
Unframed 2^23 with 14 zero limit (non-std)
Framed 2^11
Framed 2^15
Framed 2^20
Framed 2^23
Framed 2^11 with 7 zero limit
Framed 2^15 with 7 zero limit (non std)
Framed 2^20 with 14 zero limit (QRSS/QRS/QRTS))
Framed 2^23 with 14 zero limit (non-std)
077—Transmit Inband Loopback Code Configuration (TLB)
Unused bits are reserved and should be written to 0.
7
6
5
4
3
2
1
0
—
—
—
—
LB_LEN[1]
LB_LEN[0]
UNFRAMED
LBSTART
LB_LEN[1:0]
Inband Loopback Code Length (from LBP):
00 = 4 bits
01 = 5 bits
10 = 6 bits
11 = 7 bits
UNFRAMED
LBSTART
Loopback Code Overwrites Framing.
Start Inband Loopback Code Transmission.
3-66
Conexant
100054E
CONEXANT [ CONEXANT SYSTEMS, INC ]
