XRT83SL314IB View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83SL314IB' PDF : 83 Pages View PDF
XRT83SL314
REV. 1.0.1
xr
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
TABLE 27: MICROPROCESSOR REGISTER 0X02H BIT DESCRIPTION
BIT
NAME
CHANNEL 0-13 (0X02H-0XD2H)
FUNCTION
Register
Type
Default
Value
(HW reset)
D3
TxOn Transmit ON/OFF
R/W
0
Upon power up, the transmitters are powered off. This bit is used
to turn the transmitter for this channel On or Off if the TxON pin is
pulled "High". If the TxON pin is pulled "Low", all 14 transmitters
are powered off.
0 = Transmitter is Powered OFF
1 = Transmitter is Powered ON
D2
LOOP2 Loopback Diagnostic Select
D1
LOOP1 LOOP[2:0] are used to select the loopback mode.
D0
LOOP0 0XX = No Loopback
100 = Dual Loopback
101 = Analog Loopback
110 = Remote Loopback
111 = Digital Loopback
R/W
0
0
0
TABLE 28: MICROPROCESSOR REGISTER 0X03H BIT DESCRIPTION
CHANNEL 0-13 (0X03H-0XD3H)
BIT
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
D7
NLCDE1 Network Loop Code Detection Enable
D6
NLCDE0 NLCDE[1:0] are used to select the loop code detection.
00 = Disabled
01 = Detect Loop Up Code
10 = Detect Loop Down Code
11 = Automatic Loop Code Detection
R/W
0
0
D5
CODES Encoding/Decoding Select (Single Rail Mode Only)
0 = HDB3 (E1), B8ZS (T1)
1 = AMI Coding
R/W
0
D4
RxRES1 Receive External Fixed Resistor
R/W
0
D3
RxRES0 RxRES[1:0] are used to select the value for a high precision exter-
0
nal resistor to improve return loss.
00 = None
01 = 240Ω
10 = 210Ω
11 = 150Ω
55
Share Link: 
