XRT83SH38ES View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83SH38ES' PDF : 78 Pages View PDF
REV. 1.0.7
XRT83SH38
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
EQC[4:0]
0x08h
0x09h
0x0Ah
0x0Bh
0x0Ch
0x0Dh
0x1Ch
0x1Dh
TABLE 23: EQUALIZER CONTROL AND TRANSMIT LINE BUILD OUT
T1/E1 MODE/RECEIVE SENSITIVITY
T1 Short Haul/15dB
TRANSMIT LBO
0 to 133 feet (0.6dB)
CABLE
100Ω TP
T1 Short Haul/15dB
133 to 266 feet (1.2dB)
100Ω TP
T1 Short Haul/15dB
266 to 399 feet (1.8dB)
100Ω TP
T1 Short Haul/15dB
399 to 533 feet (2.4dB)
100Ω TP
T1 Short Haul/15dB
533 to 655 feet (3.0dB)
100Ω TP
T1 Short Haul/15dB
Arbitrary Pulse
100Ω TP
E1 Short Haul/15dB
ITU G.703
75Ω Coax
E1 Short Haul/15dB
ITU G.703
120Ω TP
CODING
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
HDB3
HDB3
BIT
D7
D6
D5
D4
D[3:2]
TABLE 24: MICROPROCESSOR REGISTER 0X01H BIT DESCRIPTION
CHANNEL 0-7 (0X01H-0X71H)
NAME
FUNCTION
Register
Type
RxTSEL Receive Termination Select
R/W
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
TxTSEL Transmit Termination Select
R/W
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
TERSEL1 Receive Line Impedance Select
R/W
TERSEL0 TERSEL[1:0] are used to select the line impedance for T1/J1/E1.
00 = 100Ω
01 = 110Ω
10 = 75Ω
11 = 120Ω
JASEL[1:0] Jitter Attenuator Select
R/W
JASEL[1:0] are used to select the jitter attenuator in the transmit or
receive path.
00 = Disabled
01 = Transmit Path
10 = Receive Path
11 = Receive Path
Default
Value
(HW reset)
0
0
0
0
0
54
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