XRT83L314 Datasheet, PDF (60/84 Pages) Exar Corporation – 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT

XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
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
D2
INSBPV Insert Bipolar Violation
R/W
0
When this bit transitions from a "0" to a "1", a bipolar violation will
be inserted in the transmitted QRSS/PRBS pattern. The state of
this bit will be sampled on the rising edge of TCLK. To ensure
proper operation, it is recommended to write a "0" to this bit before
writing a "1".
D1
INSBER Insert Bit Error
R/W
0
When this bit transitions from a "0" to a "1", a bit error will be
inserted in the transmitted QRSS/PRBS pattern. The state of this
bit will be sampled on the rising edge of TCLK. To ensure proper
operation, it is recommended to write a "0" to this bit before writing
a "1".
D0
Reserved This Register Bit is Not Used.
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