82P2821BH IDT, Integrated Device Technology Inc, 82P2821BH Datasheet - Page 97

• Manufacturer Part Number: 82P2821BH
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2821BH

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

LOS - LOS Configuration Register
Address: 00DH, 04DH, 08DH, 0CDH, 10DH, 14DH, 18DH, 1CDH, (CH1~CH8)
Type: Read / Write
Default Value: 15H
Programming Information
IDT82P2821
6 - 4
3 - 2
Bit
7
20DH, 24DH, 28DH, 2CDH, 30DH, 34DH, 38DH, 3CDH, (CH9~CH16)
40DH, 44DH, 48DH, 4CDH, 50DH, (CH17~CH21)
7CDH (CH0)
LAC
7
TALOS[1:0]
ALOS[2:0]
Name
LAC
ALOS2
6
This bit selects the LLOS, SLOS and AIS criteria.
0: T1.231 (in T1/J1 mode) / G.775 (in E1 mode). (default)
1: I.431 (in T1/J1 mode) / ETSI 300233 & I.431 (in E1 mode).
These bits select the amplitude threshold (Q). When the amplitude of the data is less than Q Vpp for N consecutive pulse inter-
vals, LLOS is declared. The consecutive pulse intervals (N) are determined by the LAC bit (b7, LOS,...).
The ALOS[2:0] settings for Normal Receive mode and Line Monitor mode are different. Refer to below tables.
These bits select the amplitude threshold. When the amplitude of the data is less than the threshold for a certain period, TLOS is
declared. The period is determined by the TDLOS bits (b1~0, LOS,...). When the amplitude of a pulse is above the threshold,
TLOS is cleared.
For Differential line interface:
00: 1.2 Vp.
01: 0.9 Vp. (default)
10: 0.6 Vp.
11: 0.4 Vp.
For Single Ended line interface:
00: 0.61 Vp.
01: 0.48 Vp. (default)
10: 0.32 Vp.
11: 0.24 Vp.
ALOS1
5
ALOS[2:0] Setting in Normal Receive Mode
ALOS[2:0] Setting in Line Monitor Mode
001 (default)
001 (default)
ALOS[2:0]
ALOS[2:0]
000
010
011
100
101
110
000
010
011
1xx
111
ALOS0
4
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
97
Q (Vpp)
Q (Vpp)
0.5
0.7
0.9
1.2
1.4
1.6
1.8
2.0
1.0
1.4
1.8
2.2
TALOS1
3
Description
vs. 6.0 Vpp (dB)
vs. 6.0 Vpp (dB)
reserved.
TALOS0
21.58
18.66
16.48
13.98
12.64
11.48
10.46
15.56
12.64
10.46
9.54
8.71
2
vs. 4.74 Vpp (dB)
vs. 4.74 Vpp (dB)
TDLOS1
19.54
16.61
14.43
11.93
10.59
13.52
10.59
9.43
8.41
7.49
8.41
6.67
1
February 6, 2009
TDLOS0
0