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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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1.0 Pin Description  
CX28331/CX28332/CX28333  
1.1 Pin Assignments  
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit  
Table 1-1. CX2833i-1x Pin Definitions (4 of 6)  
Pin #  
Signal Name  
Description  
I/O/P  
Notes  
CX28331-1x CX28332-1x CX28333-1x  
43  
43  
43  
E3MODE  
E3MODE  
I
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  
44  
72  
29  
72  
44  
LBO  
LBO1  
LBO2  
Transmit line Ch1  
build-out mode  
I
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.  
1 = Inserts line build-out into the  
transmit channel. Usually used  
when the transmit cable is less than  
350 feet in length.  
Transmit line Ch2  
build-out mode  
I
I
29  
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.  
56  
74  
27  
74  
56  
LLOOP  
LLOOP1  
LLOOP2  
Local loopback enable  
Ch1  
I
Local loopback enable per channel.  
The transmit data is looped back  
immediately from the encoder to  
the decoder in place of the received  
data.  
Local loopback enable  
Ch2  
I
I
I
1 = local loopback enabled  
0 = local loopback disabled  
27  
LLOOP3  
Local loopback enable  
Ch3  
57  
75  
26  
75  
57  
RLOOP  
RLOOP1  
RLOOP2  
Remote loopback enable  
Ch1  
Remote loopback enable per  
channel. The receive data, retimed  
after clock recovery, is looped back  
into the AMI generator in place of  
the transmit data.  
Remote loopback enable  
Ch2  
I
I
I
1 = remote loopback enabled  
0 = remote loopback disabled  
26  
RLOOP3  
Remote loopback enable  
Ch3  
45  
71  
30  
71  
45  
XOE  
XOE1  
XOE2  
Transmit output enable  
Ch1  
Transmit output enable per channel.  
1 = transmit line output driver  
enabled  
0 = transmit output driver set to  
high impedance state  
Transmit output enable  
Ch2  
I
I
30  
XOE3  
Transmit output enable  
Ch3  
1-8  
Conexant  
100985A  
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