XRT83SH38ES View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83SH38ES' PDF : 78 Pages View PDF
REV. 1.0.7
BIT
D3
D2
D1
D0
XRT83SH38
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
TABLE 25: MICROPROCESSOR REGISTER 0X02H BIT DESCRIPTION
CHANNEL 0-7 (0X02H-0X72H)
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
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 8 transmitters are
powered off.
0 = Transmitter is Powered OFF
1 = Transmitter is Powered ON
LOOP2
LOOP1
LOOP0
Loopback Diagnostic Select
LOOP[2:0] are used to select the loopback mode.
0XX = No Loopback
100 = Dual Loopback
101 = Analog Loopback
110 = Remote Loopback
111 = Digital Loopback
R/W
0
0
0
BIT
D[7:6]
D5
D4
D3
D2
TABLE 26: MICROPROCESSOR REGISTER 0X03H BIT DESCRIPTION
CHANNEL 0-7 (0X03H-0X73H)
NAME
FUNCTION
Register
Type
Reserved This Register Bit is Not Used.
CODES Encoding/Decoding Select (Single Rail Mode Only)
R/W
0 = HDB3 (E1), B8ZS (T1)
1 = AMI Coding
RxRES1 Receive External Fixed Resistor
R/W
RxRES0 RxRES[1:0] are used to select the value for a high precision exter-
nal resistor to improve return loss.
00 = None
01 = 240Ω
10 = 210Ω
11 = 150Ω
INSBPV Insert Bipolar Violation
R/W
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".
Default
Value
(HW reset)
0
0
0
0
56
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