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 25: EQUALIZER CONTROL AND TRANSMIT LINE BUILD OUT
EQC[4:0]
0x1Dh
0x1Eh
0x1Fh
T1/E1 MODE/RECEIVE SENSITIVITY
E1 Short Haul/15dB
E1 Gain Mode/29dB
E1 Gain Mode/29dB
TRANSMIT LBO
ITU G.703
ITU G.703
ITU G.703
CABLE
120Ω TP
75Ω Coax
120Ω TP
CODING
HDB3
HDB3
HDB3
TABLE 26: MICROPROCESSOR REGISTER 0X01H BIT DESCRIPTION
CHANNEL 0-13 (0X01H-0XD1H)
BIT
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
D7
RxTSEL Receive Termination Select
R/W
0
Upon power up, the receiver is in "High" impedance. RxTSEL is
used to switch between the internal termination and "High" imped-
ance.
0 = "High" Impedance
1 = Internal Termination
D6
TxTSEL Transmit Termination Select
R/W
0
Upon power up, the transmitter is in "High" impedance. TxTSEL is
used to switch between the internal termination and "High" imped-
ance.
0 = "High" Impedance
1 = Internal Termination
D5
TERSEL1 Receive Line Impedance Select
R/W
0
D4
TERSEL0 TERSEL[1:0] are used to select the line impedance for T1/J1/E1.
0
00 = 100Ω
01 = 110Ω
10 = 75Ω
11 = 120Ω
D3
RxJASEL Receive Jitter Attenuator Select
R/W
0
RxJASEL is used to enable the receiver jitter attenuator. By
default, RxJASEL is disabled.
0 = Disabled
1 = Enabled
D2
TxJASEL Transmit Jitter Attenuator Select
R/W
0
TxJASEL is used to enable the transmitter jitter attenuator. By
default, TxJASEL is disabled.
0 = Disabled
1 = Enabled
53
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