CX28398 Conexant Systems, CX28398 Datasheet - Page 188

• Manufacturer Part Number: CX28398
• Description: (CX28394 - CX28398) Quad/x16/Octal?T1/E1/J1 Framers
• Manufacturer: Conexant Systems

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