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LXT351QE 参数 Datasheet PDF下载

LXT351QE图片预览
型号: LXT351QE
PDF下载: 下载PDF文件 查看货源
内容描述: PCM收发器|单| CEPT PCM - 30 / E - 1 | CMOS | QFP | 44PIN |塑料\n [PCM TRANSCEIVER|SINGLE|CEPT PCM-30/E-1|CMOS|QFP|44PIN|PLASTIC ]
分类和应用: 电信集成电路PC
文件页数/大小: 46 页 / 1070 K
品牌: INTEL [ INTEL ]
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T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation LXT351  
Table 7. Control Register #1 Read/Write, Address (A7-A0) = x010000x  
Jitter Attenuator  
JASEL1  
Bit  
Name  
Function  
JASEL0  
Position  
0
1
2
3
EC1  
EC2  
EC3  
-
1
1
0
0
1
X
Transmit  
Receive  
Disabled  
Sets mode (T1 or E1) and equalizer  
(see Table 8 below for control codes).  
Reserved, set this bit to 0, ignore when reading.  
1 = Enable Unipolar I/O mode and allow insertion/detection of BPVs.  
0 = Enable Bipolar I/O mode  
4
5
UNIENB  
1 = Enable B8ZS/HDB3 encoders/decoders and force Unipolar I/O  
mode.  
ENCENB  
0 = Disable B8ZS/HDB3 encoders/decoders  
6
7
JASEL0  
JASEL1  
Select jitter attenuation circuitry position in data path or disables the  
JA. See right hand section of table for codes.  
Table 8. Equalizer Control Input Settings  
EC3  
EC2  
EC1  
Function  
Pulse  
Cable  
Coding1  
0
0
1
1
1
1
0
1
0
0
1
1
0
1
0
1
0
1
E1  
T1  
T1  
T1  
T1  
T1  
ITU Rec G.703  
0-133 ft / 0.6 dB  
75 Coax/120 TP  
100 TP  
HDB3  
B8ZS  
B8ZS  
B8ZS  
B8ZS  
B8ZS  
133-266 ft / 1.2 dB  
266-399 ft / 1.8 dB  
399-533 ft / 2.4 dB  
533-655 ft / 3.0 dB  
100 TP  
100 TP  
100 TP  
100 TP  
1. When enabled.  
Table 9. Control Register #2 Read/Write, Address (A7-A0) = x010001x  
Pattern  
Bit  
Name  
Function  
EPAT0  
EPAT1  
Selected  
1 = Enable Remote loopback mode  
0 = Disable Remote loopback mode  
0
1
ERLOOP1  
ELLOOP1  
0
0
Transmit TPOS/TNEG  
1 = Enable Local loopback mode  
0 = Disable Local loopback mode  
0
1
Detect and transmit QRSS  
1 = Enable Analog loopback mode  
0 = Disable Analog loopback mode  
In-band Loop Up Code  
00001  
2
3
EALOOP  
-
1
1
0
1
In-band Loop Down Code  
001  
Reserved, set to 0, ignore when reading.  
1. To enable Dual loopback (DLOOP), set both ERLOOP = 1 and ELLOOP = 1.  
Datasheet  
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