XRT86L30
REV. 1.0.1
SINGLE T1/E1/J1 FRAMER/LIU COMBO
3.5
Programming the Line Interface Unit (LIU Section)
Control Registers
TABLE 142: MICROPROCESSOR REGISTER #556 BIT DESCRIPTION
R
EGISTER ADDRESS
C
HANNEL 0
R
EGISTER
YPE
R
VALUE
ESET
0X
0F00
H
FUNCTION
T
B
IT
#
NAME
D7
D6
D5
Reserved
Reserved
RXON_n
This Bit Is Not Used
This Bit Is Not Used
R/W
R/W
R/W
0
0
Receiver ON: Writing a “1” into this bit location turns on the
Receive Section of channel n. Writing a “0” shuts off the
Receiver Section of channel n.
D4
EQC4_n
Equalizer Control bit 4: This bit together with EQC[3:0] are
used for controlling transmit pulse shaping, transmit line build-
out (LBO) and receive monitoring for either T1 or E1 Modes of
R/W
0
operation. See Table
.
D3
D2
D1
D0
EQC3_n
EQC2_n
EQC1_n
EQC0_n
Equalizer Control bit 3: See bit D4 description for function of
this bit
R/W
R/W
R/W
R/W
0
0
0
0
Equalizer Control bit 2: See bit D4 description for function of
this bit
Equalizer Control bit 1: See bit D4 description for function of
this bit
Equalizer Control bit 0: See bit D4 description for function of
this bit
TABLE 143: EQUALIZER
C
ONTROL AND
TRANSMIT
LINE BUILD OUT
EQC[4:0]
0x00h
0x01h
0x02h
0x03h
0x04h
0x05h
0x06h
0x07h
0x08h
0x09h
0x0Ah
0x0Bh
0x0Ch
T1/E1 MODE/RECEIVE
S
ENSITIVITY
T
RANSMIT LBO
C
ABLE
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
100
100
100
100
100
100
100
100
100
100
100
100
100
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
-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)
118
EXAR [ EXAR CORPORATION ]
