XRT83L314 Datasheet, PDF (56/84 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 24: MICROPROCESSOR REGISTER 0X00H BIT DESCRIPTION
BIT
NAME
CHANNEL 0-13 (0X00H-0XD0H)
FUNCTION
Register
Type
Default
Value
(HW reset)
D7
QRSS/ QRSS/PRBS Select Bits
PRBS _{These bits are used to select between QRSS and PRBS.}
0 = QRSS
1 = PRBS
R/W
0
D6
Reserved This Register Bit is Not Used.
D5
RxON Receiver ON/OFF
R/W
0
Upon power up, the receiver is powered OFF. RxON is used to
turn the receiver ON or OFF if the hardware pin RxON is pulled
"High". If the hardware pin is pulled "Low", all receivers are turned
off.
0 = Receiver is Powered Off
1 = Receiver is Powered On
D4
EQC4 Equalizer Control Bits
D3
EQC3 The equalizer control bits are shown in Table 25 below.
D2
EQC2
D1
EQC1
D0
EQC0
R/W
0
0
0
0
0
EQC[4:0]
0x00h
0x01h
0x02h
0x03h
0x04h
0x05h
0x06h
0x07h
0x08h
0x09h
0x0Ah
0x0Bh
0x0Ch
TABLE 25: EQUALIZER CONTROL AND TRANSMIT LINE BUILD OUT
T1/E1 MODE/RECEIVE SENSITIVITY
TRANSMIT LBO
CABLE
T1 Long Haul/36dB
T1 Long Haul/36dB
T1 Long Haul/36dB
T1 Long Haul/36dB
T1 Long Haul/45dB
T1 Long Haul/45dB
T1 Long Haul/45dB
T1 Long Haul/45dB
T1 Short Haul/15dB
T1 Short Haul/15dB
T1 Short Haul/15dB
T1 Short Haul/15dB
T1 Short Haul/15dB
0dB
-7.5dB
-15dB
-22.5dB
0dB
-7.5dB
-15dB
-22.5dB
0 to 133 feet (0.6dB)
133 to 266 feet (1.2dB)
266 to 399 feet (1.8dB)
399 to 533 feet (2.4dB)
533 to 655 feet (3.0dB)
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
100Ω TP
CODING
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
B8ZS
52