Bt8370/8375/8376
3.7 Receive LIU Registers
Fully Integrated T1/E1 Framer and Line Interface
02A—Pre_Equalizer (PRE_EQ)
7
6
5
4
3
2
1
0
FORCE
ON
VTHRESH[5:0]
PRE_EQ[7:0]
Internally set to default value during RESET or RST_LIU. PRE_EQ is an analog filter that
resides after the VGA and which operates independently of the adaptive digital equalizer.
PRE_EQ compensates for distortion introduced by long and extended long-haul lines. To
configure this register, please see Table 3-9, Receive LIU Register Settings versus Application.
Force
ON
X
1
0
1
1
Auto
Forced On
Forced Off
0
030–037—LMS Adjusted Equalizer Coefficient Status (COEFF)
7
6
5
4
3
2
1
0
COEFF[7]
COEFF[6]
COEFF[5]
COEFF[4]
COEFF[3]
COEFF[2]
COEFF[1]
COEFF[0]
COEFF[7:0]
8-Bit Adjusted Coefficient.
038–03C—Equalizer Gain Thresholds (GAIN)
7
6
5
4
3
2
1
0
—
—
GAIN[5]
GAIN[4]
GAIN[3]
GAIN[2]
GAIN[1]
GAIN[0]
GAIN[5:0]
Default loaded from ROM after RESET or RST_LIU.
3-46
Conexant
N8370DSE
CONEXANT [ CONEXANT SYSTEMS, INC ]
