参数资料
型号: IDT82P20416DBFG
厂商: IDT, Integrated Device Technology Inc
文件页数: 94/121页
文件大小: 0K
描述: IC LIU T1/E1/J1 16CH SH 484BGA
标准包装: 84
功能: 线路接口单元(LIU)
接口: E1,J1,T1
电路数: 16
电源电压: 1.8V, 3.3V
功率(瓦特): 3.10W
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 484-LFBGA
供应商设备封装: 484-CABGA(19x19)
包装: 托盘
包括: AIS 警报检测器和发生器,回送功能,PRBS 发生器 / 检测器,远程检测器和发生器
IDT82P20416
16-CHANNEL SHORT HAUL T1/E1/J1 LINE INTERFACE UNIT
Programming Information
74
December 17, 2009
LOS - LOS Configuration Register
Address: 00DH, 04DH, 08DH, 0CDH, 10DH, 14DH, 18DH, 1CDH, (CH1~CH8)
20DH, 24DH, 28DH, 2CDH, 30DH, 34DH, 38DH, (CH9~CH15)
7CDH (CH0)
Type: Read / Write
Default Value: 15H
Bit
Name
Description
7
LAC
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).
6 - 4
ALOS[2:0]
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.
3 - 2
TALOS[1:0]
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.
765
43
21
0
LAC
ALOS2
ALOS1
ALOS0
TALOS1
TALOS0
TDLOS1
TDLOS0
ALOS[2:0] Setting in Normal Receive Mode
ALOS[2:0]
Q (Vpp)
vs. 6.0 Vpp (dB)
vs. 4.74 Vpp (dB)
000
0.5
21.58
19.54
001 (default)
0.7
18.66
16.61
010
0.9
16.48
14.43
011
1.2
13.98
11.93
100
1.4
12.64
10.59
101
1.6
11.48
9.43
110
1.8
10.46
8.41
111
2.0
9.54
7.49
ALOS[2:0] Setting in Line Monitor Mode
ALOS[2:0]
Q (Vpp)
vs. 6.0 Vpp (dB)
vs. 4.74 Vpp (dB)
000
1.0
15.56
13.52
001 (default)
1.4
12.64
10.59
010
1.8
10.46
8.41
011
2.2
8.71
6.67
1xx
reserved.
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