参数资料
型号: WJLXT384LEB1
厂商: CORTINA SYSTEMS INC
元件分类: 数字传输电路
英文描述: DATACOM, PCM TRANSCEIVER, PQFP144
封装: 20 X 20MM, ROHS COMPLIANT, LQFP-144
文件页数: 122/140页
文件大小: 1514K
代理商: WJLXT384LEB1
82
Document Number: 248994
Revision Number: 005
Revision Date: November 28, 2005
Intel LXT384 Octal T1/E1/J1 S/H PCM Transceiver with JA
Table 40. Digital Loopback Register, DL - 0Ch
Bit
Name
Description
R/W
7:0
DL7:0
Digital Loopback.
On power-up, the DL7:0 bits are cleared to ‘0’, and all digital loopback
channels are disabled.
Setting a DL bit to ‘1’ enables digital loopback for its corresponding
transceiver.
During digital loopback, LOS and TAOS stay active and independent of TCLK,
while data received on TPOS, TNEG, and CKLK loop back to RPOS, RNEG,
and RCLK.
R/W
Table 41. LOS/AIS Criteria Selection Register, LACS - 0Dh
Bit
Name
Description
R/W
7:0
LACS7:0
Loss of Signal / Alarm Indication Signal Selection Criteria.
At power-up, all LACS7:0 bits are cleared to ‘0’.
After power-up, programming an LACS bit to:
‘0’ selects the ITU G.775 mode [for LOS, AIS, and remote detect
indication (RDI)] for its corresponding receiver.
‘1’ selects the ETSI 300 233 LOS and AIS detection mode for the
corresponding receiver.
In T1 mode, this register is “Don’t Care.” The LXT384 Transceiver uses
T1.231 compliant LOS/AIS detection.
R/W
Table 42. Automatic TAOS Select Register, ATS - 0Eh
Bit
Name
Description
R/W
7:0
ATS7:0
Automatic Transmit-All-Ones Select.
On power-on, all ATS7:0 bits are cleared to ‘0’.
When this field is set to ‘1’, then when there is an LOS condition, TAOS
can be generated automatically.
NOTE: This register does not work during either data-recovery mode or line-
driver mode (that is, when both MCLK = High and TCLK = High).
R/W
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