參數(shù)資料
型號： PE-68629
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)： 5/55頁
文件大?。?/td> 608K
代理商： PE-68629
á
E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7300
REV. 1.1.1
III
COMMAND REGISTER CR2 (ADDRESS = 0X02) .................................................................................. 33
Muting the Recovered Data while the LOS is being Declared............................................................. 33
3.7 R
OUTING
THE
R
ECOVERED
T
IMING
AND
D
ATA
I
NFORMATION
TO
THE
R
ECEIVING
T
ERMINAL
E
QUIPMENT
.... 33
COMMAND REGISTER CR3 (ADDRESS = 0X03) .................................................................................. 33
Figure 23. The Typical Interface for the Transmission of Data in a Dual-Rail Format From the Receive Section
of the XRT7300 to the Receiving Terminal Equipment...................................................................... 34
Figure 24. How the XRT7300 Outputs Data on the RPOS and RNEG Output Pins ........................................ 34
Figure 25.The Behavior of the RPOS, RNEG and RCLK1 Signals When RCLK1 is Inverted ......................... 35
Routing Single-Rail Format data (Binary Data Stream) to the Receive Terminal Equipment ............. 35
COMMAND REGISTER CR3 (ADDRESS = 0X03) .................................................................................. 35
COMMAND REGISTER CR3 (ADDRESS = 0X03) .................................................................................. 35
Figure 26.The Typical Interface for the Transmission of Data in a Single-Rail Format From the Receive Section
of the XRT7300 to the Receiving Terminal Equipment...................................................................... 36
Figure 27.The Behavior of the RPOS and RCLK1 Output Signals While the XRT7300 is Transmitting Single-Rail
Data to the Receiving Terminal Equipment........................................................................................ 36
4.0 DIAGNOSTIC FEATURES OF THE XRT7300 ........................................................................................ 36
4.1 T
HE
A
NALOG
L
OCAL
L
OOP
-B
ACK
M
ODE
................................................................................................. 36
Figure 28.The Analog Local Loop-Back in the XRT7300 ................................................................................. 37
COMMAND REGISTER CR4 (ADDRESS = 0X04) .................................................................................. 37
4.2 T
HE
D
IGITAL
L
OCAL
L
OOP
-B
ACK
M
ODE
.................................................................................................. 37
Figure 29.The Digital Local Loop-Back path in the XRT7300 .......................................................................... 38
COMMAND REGISTER CR4 (ADDRESS = 0X04) .................................................................................. 38
4.3 T
HE
R
EMOTE
L
OOP
-B
ACK
M
ODE
............................................................................................................ 38
Figure 30.The Remote Loop-Back Path in the XRT7300................................................................................. 39
COMMAND REGISTER CR4 (ADDRESS = 0X04) .................................................................................. 39
4.4 TXOFF F
EATURES
................................................................................................................................. 40
COMMAND REGISTER CR1 (ADDRESS = 0X01) .................................................................................. 40
4.5 T
HE
T
RANSMIT
D
RIVE
M
ONITOR
F
EATURES
............................................................................................ 40
Figure 31.The XRT7300 Employing the Transmit Drive Monitor Features....................................................... 40
Figure 32. Two LIU’s, Each Monitoring the Transmit Output Signal of the Other LIU IC ................................. 41
4.6 T
HE
TAOS (T
RANSMIT
A
LL
O
NE
S) F
EATURE
.......................................................................................... 41
COMMAND REGISTER CR1 (ADDRESS = 0X01) .................................................................................. 41
5.0 THE MICROPROCESSOR SERIAL INTERFACE ................................................................................... 42
5.1 D
ESCRIPTION
OF
THE
C
OMMAND
R
EGISTERS
.......................................................................................... 42
Table 5:Addresses and Bit Formats of XRT7300 Command Registers ........................................................... 42
DESCRIPTION OF BIT-FIELDS FOR EACH COMMAND REGISTER .................................................... 42
Command Register - CR0 ................................................................................................................... 42
Command Register - CR1 ................................................................................................................... 43
Command Register - CR2 ................................................................................................................... 44
Command Register - CR3 ................................................................................................................... 44
Command Register - CR4 ................................................................................................................... 45
5.2 O
PERATING
THE
M
ICROPROCESSOR
S
ERIAL
I
NTERFACE
.......................................................................... 45
Table 6:Loop-Back Modes................................................................................................................................ 45
Figure 33.Microprocessor Serial Interface Data Structure ............................................................................... 46
Figure 34. How to Interface the XRT7300 IC to the XRT7234/45 E3/DS3 ATM UNI IC .................................. 47
Figure 35.How to Interface the XRT7300 IC to the XRT7250 DS3/E3 Framer IC............................................ 48
ORDERING INFORMATION ..................................................................................................................... 49
Package Dimensions ....................................................................................................... 49
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