參數(shù)資料
型號： XRT73LC00
廠商： Exar Corporation
英文描述： E3/DS3/STS-1 LINE INTERFACE UNIT
中文描述： E3/DS3/STS-1線路接口單元
文件頁數(shù)： 5/53頁
文件大小： 604K
代理商： XRT73LC00
á
XRT73L00
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.2.0
III
Figure 28. The Analog Local Loop-Back in the XRT73L00 ............................................................................ 39
C
OMMAND
R
EGISTER
CR4 (A
DDRESS
= 0
X
04) ........................................................................................... 40
4.2 T
HE
D
IGITAL
L
OCAL
L
OOP
-B
ACK
M
ODE
............................................................................................... 40
Figure 29. The Digital Local Loop-Back path in the XRT73L00 ..................................................................... 40
C
OMMAND
R
EGISTER
CR4 (A
DDRESS
= 0
X
04) ........................................................................................... 41
4.3 T
HE
R
EMOTE
L
OOP
-B
ACK
M
ODE
......................................................................................................... 41
Figure 30. The Remote Loop-Back Path in the XRT73L00 ............................................................................ 41
4.4 TXOFF F
EATURES
.............................................................................................................................. 42
C
OMMAND
R
EGISTER
CR4 (A
DDRESS
= 0
X
04) ........................................................................................... 42
4.5 T
HE
T
RANSMIT
D
RIVE
M
ONITOR
F
EATURES
.......................................................................................... 42
C
OMMAND
R
EGISTER
CR1 (A
DDRESS
= 0
X
01) ........................................................................................... 42
Figure 31. The XRT73L00 Employing the Transmit Drive Monitor Features .................................................. 42
Figure 32. Two LIU’s, Each Monitoring the Transmit Output Signal of the Other LIU IC .............................. 43
4.6 T
HE
TAOS (T
RANSMIT
A
LL
O
NE
S) F
EATURE
....................................................................................... 43
C
OMMAND
R
EGISTER
CR1 (A
DDRESS
= 0
X
01) ........................................................................................... 43
5.0 The Microprocessor Serial Interface ........................................................................ 44
5.1 D
ESCRIPTION
OF
THE
C
OMMAND
R
EGISTERS
........................................................................................ 44
T
ABLE
5: A
DDRESSES
AND
B
IT
F
ORMATS
OF
XRT73L00 C
OMMAND
R
EGISTERS
................................................ 44
D
ESCRIPTION
OF
B
IT
-F
IELDS
FOR
E
ACH
C
OMMAND
REGISTER
..................................................................... 44
5.1.1 Command Register - CR0 ...................................................................................................... 44
5.1.2 Command Register - CR1 ...................................................................................................... 45
5.1.3 Command Register - CR2 ...................................................................................................... 46
5.1.4 Command Register - CR3 ...................................................................................................... 46
5.1.5 Command Register - CR4 ...................................................................................................... 46
5.2 O
PERATING
THE
M
ICROPROCESSOR
S
ERIAL
I
NTERFACE
. ...................................................................... 47
T
ABLE
6: L
OOP
-B
ACK
M
ODES
........................................................................................................................... 47
Figure 33. Microprocessor Serial Interface Data Structure ............................................................................ 48
O
RDERING
I
NFORMATION
............................................................................................................................ 49
PACKAGE DIMENSIONS ................................................................................................. 49
R
EVISION
H
ISTORY
..................................................................................................................................... 50
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