參數(shù)資料
型號: XRT83VSH38IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PBGA225
封裝: 19 X 19 MM, 1 MM PITCH, PLASTIC, BGA-225
文件頁數(shù): 57/76頁
文件大?。?/td> 722K
代理商: XRT83VSH38IB
XRT83VSH38
54
REV. 1.0.7
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
T
ABLE
24: M
ICROPROCESSOR
R
EGISTER
0
X
02
H
B
IT
D
ESCRIPTION
C
HANNEL
0-7 (0
X
02
H
-0
X
72
H
)
B
IT
N
AME
F
UNCTION
Register
Type
Default
Value
(HW reset)
D7
INVQRSS
QRSS inversion
INVQRSS is used to invert the transmit QRSS pattern set by the
TxTEST[2:0] bits. By default, INVQRSS is disabled and the QRSS
will be transmitted with normal polarity.
0 = Disabled
1 = Enabled
R/W
0
D6
D5
D4
TxTEST2
TxTEST1
TxTEST0
Test Code Pattern
TxTEST[2:0] are used to select a diagnostic test pattern to the line
(transmit outputs).
0XX = No Pattern
100 = Tx QRSS
101 = Tx TAOS
110 = Reserved
111 = Reserved
R/W
0
0
0
D3
TxOn
Transmit ON/OFF
Upon power up, the transmitters are powered off. This bit is used
to turn the transmitter for this channel On or Off if the TxONCNTL
bit is "Low". If the TxONCNTL bit is "High", the TxON hardware
pins control the transmitter activity.
0 = Transmitter is Powered OFF
1 = Transmitter is Powered ON
R/W
0
D2
D1
D0
LOOP2
LOOP1
LOOP0
Loopback Diagnostic Select
LOOP[2:0] are used to select the loopback mode.
0XX = No Loopback
100 = Dual Loopback
101 = Analog Loopback
110 = Remote Loopback
111 = Digital Loopback
R/W
0
0
0
T
ABLE
25: M
ICROPROCESSOR
R
EGISTER
0
X
03
H
B
IT
D
ESCRIPTION
C
HANNEL
0-7 (0
X
03
H
-0
X
73
H
)
B
IT
N
AME
F
UNCTION
Register
Type
Default
Value
(HW reset)
D[7:6]
Reserved
This Register Bit is Not Used.
D5
CODES
Encoding/Decoding Select (Single Rail Mode Only)
0 = HDB3 (E1), B8ZS (T1)
1 = AMI Coding
R/W
0
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