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參數(shù)資料
型號: IDT82P2521BH
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 144/147頁
文件大?。?/td> 0K
描述: IC LIU E1 21+1CH SHORT 640-PBGA
標準包裝: 5
類型: 線路接口裝置(LIU)
規(guī)程: E1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 640-BGA 裸露焊盤
供應(yīng)商設(shè)備封裝: 640-PBGA-EP(31x31)
包裝: 托盤
其它名稱: 82P2521BH
IDT82P2521
21(+1) CHANNEL HIGH-DENSITY E1 LINE INTERFACE UNIT
Programming Information
96
December 7, 2005
LOS - LOS Configuration Register
Address: 00DH, 04DH, 08DH, 0CDH, 10DH, 14DH, 18DH, 1CDH, (CH1~CH8)
20DH, 24DH, 28DH, 2CDH, 30DH, 34DH, 38DH, 3CDH, (CH9~CH16)
40DH, 44DH, 48DH, 4CDH, 50DH, (CH17~CH21)
7CDH (CH0)
Type: Read / Write
Default Value: 15H
Bit
Name
Description
7
LAC
This bit selects the LLOS, SLOS and AIS criteria.
0: G.775. (default)
1: ETSI 300233 & I.431.
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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