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CX28333-1X 参数 Datasheet PDF下载

CX28333-1X图片预览
型号: CX28333-1X
PDF下载: 下载PDF文件 查看货源
内容描述: 单/双/三E3 / DS3 / STS - 1线路接口单元 [Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit]
分类和应用: 电信集成电路PC
文件页数/大小: 68 页 / 549 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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CX28331/CX28332/CX28333  
1.0 Pin Description  
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit  
1.1 Pin Assignments  
Table 1-2. CX2833i-3x Pin Definitions (4 of 8)  
Pin #  
Signal Name  
Description  
I/O/P  
Notes  
CX28331-3x CX28332-3x CX28333-3x  
Control Signals  
74  
74  
74  
ENDECDIS Encoder/decoder  
disable (for all  
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1 = Dual rail pulse coded data format. Input  
transmit data pins TPOS, TNRZ, TNEG and  
NC are interpreted as TPOS and TNEG  
(encoded positive and negative rail data).  
Output receive data pins RPOS and RNRZ,  
and RNEG and RLCV are interpreted as  
RPOS and RNEG, with RPOS having a  
positive pulse in place of every positive AMI  
pulse and RNEG having a negative pulse in  
place of every negative AMI pulse.  
channels)  
0 = NRZ format. Transmit data pins TPOS  
and TNEG are interpreted as TNRZ and NC  
(not connected). Receive data pins RPOS  
and RNEG are interpreted as RNRZ and  
RLCV. In this mode, all line code violations  
are reported as active high on RLCV.  
63  
76  
49  
76  
63  
TAIS  
TAIS1  
TAIS2  
Transmit Ch1  
AIS mode enable  
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Transmission of Alarm Indication Signal  
(AIS) for a given channel. Replace transmit  
data with AIS signal. The AMI form of AIS  
supported is alternating 1s.  
Transmit Ch2  
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(+1, -1, +1, -1, +1, ...)  
AIS mode enable  
Looping takes precedence over AIS.  
1 = AIS mode enabled  
0 = AIS mode disabled  
49  
53  
TAIS3  
Transmit Ch3  
AIS mode enable  
53  
53  
E3MODE  
E3MODE  
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When the pin is set to high, it enables the  
E3 mode on all channels, instead of the  
DS3/STS-1 mode. This also changes the  
pulse shaper to E3 mode and overrides all  
LBO pins. It also changes the  
encoder/decoder from B3ZS mode to HDB3  
mode.  
1 = E3 mode  
0 = DS3/STS-1 mode  
55  
LBO  
Transmit line  
Ch1 build-out  
mode  
I
I
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Line build-out mode per channel, based on  
the length of cable on the transmit side of  
the cross-connect block. This bit is  
overridden and the pulse shaper is disabled  
(no pulse shaping) if E3MODE = 1.  
91  
91  
LBO1  
34  
55  
LBO2  
Transmit line  
Ch2 build-out  
mode  
1 = Inserts line build-out into the transmit  
channel. Usually used when the transmit  
cable is less than 350 feet in length.  
34  
LBO3  
Transmit line  
Ch3 build-out  
mode  
0 = Line build-out bypassed (not inserted).  
Usually used when the transmit cable is  
greater than 350 feet in length.  
100985A  
Conexant  
1-17  
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