XRT83VSH316
75
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.1
TABLE 44: MICROPROCESSOR REGISTER 0XN01H BIT DESCRIPTION
CHANNEL N (0XN01H)
BIT
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
D7
RxTSEL
Receive Termination Select
Upon power up, the receiver is in "High" impedance. RxTSEL is
used to switch between the internal termination and "High" imped-
ance.
0 = External Termination
1 = Internal Termination
R/W
0
D6
TxTSEL
Transmit Termination Select
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
R/W
0
D5
D4
TERSEL1
TERSEL0
Receive Line Impedance Select
TERSEL[1:0] are used to select the line impedance for T1/J1/E1.
R/W
0
D3
D2
JASEL1
JASEL0
Jitter Attenuator Select
JASEL[1:0] are used to enable the jitter attenuator in the receive or
transmit path. By default, the jitter attenuator is disabled.
R/W
0
TERSEL1
TERSEL0
0
1
0
1
0
LINE IMPEDANCE
100
120
75
110
JASEL1
JASEL0
0
1
0
1
0
Disabled
Receive Path
Transmit Path
JA PATH