參數(shù)資料
型號(hào)： XRT81L27IV
廠商： EXAR CORP
元件分類(lèi)： 數(shù)字傳輸電路
英文描述： SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY
中文描述： DATACOM, PCM TRANSCEIVER, PQFP128
封裝： TQFP-128
文件頁(yè)數(shù)： 19/30頁(yè)
文件大?。?/td> 194K
代理商： XRT81L27IV
á
XRT81L27
SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY
REV. 1.1.0
17
T
ABLE
11: L
OCAL
L
OOP
-
BACK
R
EGISTERS
- A
DDRESS
: 0001, HEX 0
X
01
B
IT
#.
N
AME
F
UNCTION
R
EGISTER
T
YPE
0-6
LLB0-LLB6
Local Loop-Back:
Writing a "1" to this bit enables Local Loop-back for the channel(s) selected.
During Local loop-back, transmit input data continues to be sent to the line
unless overridden by TAOS control.
R/W
T
ABLE
12: R
EMOTE
L
OOP
-
BACK
R
EGISTERS
- A
DDRESS
: 0010, HEX 0
X
02
B
IT
#.
N
AME
F
UNCTION
R
EGISTER
T
YPE
0-6
RLB0-RLB6
Remote Loop-back:
Wring a "1" to this bit enables Remote Loop-back for the channel(s)
selected. During Remote Loop-back, receive output data is available at
RPOS/RNEG unless overridden by RAOS request
R/W
T
ABLE
13: A
NALOG
L
OOP
-
BACK
R
EGISTERS
- A
DDRESS
: 0011, HEX 0
X
03
B
IT
#.
N
AME
F
UNCTION
R
EGISTER
T
YPE
0-6
ALB0-ALB6
Analog Loop-back:
Writing a “1” to this bit enables Analog Local Loop-back for the channel(s)
selected. Analog Loop-back ignores input data on RTIP and RRING and
internally routes data at TTIP and TRING back to the receive input. This
loop-back mode exercises most of the functional blocks of the channel. Ana-
log Loop-back has priority over other Loop-back, TAOS and RAOS requests.
R/W
T
ABLE
14: TAOS R
EGISTERS
- A
DDRESS
: 0100, HEX 0
X
04
B
IT
#.
N
AME
F
UNCTION
R
EGISTER
T
YPE
0-6
TAOS0-TAOS6
Transmit All Ones
Writing a "1" to this bit enables an AMI encoded all ones data to be transmit-
ted to the line for the channel(s) selected. Transmit input data is ignored
when TAOS bit is set. Remote Loop-Back has priority over TAOS request.
R/W
T
ABLE
15: RAOS R
EGISTERS
- A
DDRESS
: 0101, HEX 0
X
05
B
IT
N
O
.
N
AME
F
UNCTION
R
EGISTER
T
YPE
0-6
RAOS0-
RAOS6
Receive All Ones:
Writing a "1" to this bit enables all ones data to be inserted on the receive side
for the channel(s) selected. In
Single-Rail mode
, all ones data is a continuous
"High" signal at RPOS output and in
Dual-Rail mode
, a "1010" pattern is sent
to RPOS and RNEG while the receive input signal at RRTIP and RRING is
ignored. Local Loop-Back has priority over RAOS and ARAOS request.
R/W
相關(guān)PDF資料
PDF描述
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