GDC21D003 Datasheet, PDF (24/77 Pages) Hynix Semiconductor – VSB Receiver

Address 35 :
7
nIIR16ONIN
6
nIIRONIN
5
nAdtOnDataI2
[4:3]
BLNDmodeIN
[1:0]
2
nRingENIN
1
nCoefRead
0
nMakeRingIN
GDC21D003
‘0’ : feedback filter is on in 16 VSB mode
W/R ‘1’ : feedback filter is off
Initial value is ‘1’.
‘0’ : feedback filter is on in 2, 4 and 8 VSB mode
W/R ‘1’ : feedback filter is on only in 8 VSB mode
Initial value is ‘0’.
‘0’ : coefficient adaptation during training sequence and data interval
W/R ‘1’ : coefficient adaptation during training sequence interval only
Initial value is ‘1’. If you want to control Equalizer fast, use external input pins.
“00” : does not use blind equalization
W/R
“01” : uses blind equalization with 4-level data
“10”, “11” : uses blind equalization with 2-level data
Initial value is “00”.
‘1’ : can not change nMakeRingIN
W/R ‘0’ : can change nMakeRingIN
Initial value is ‘1’.
‘0’ : read coefficient
W/R ‘1’ : write coefficient
Initial value is ‘1’.
‘0’ : can read and write the coefficients
W/R ‘1’ : normal operation
Initial value is ‘1’.
Address 36:
[7:6] PredicIN[1: 0]
[5:3]
LOOPgainIN
[2 : 0]
2
nOPERmodeIN
1
nDNgainIN
0
nDNgainThIN
Determines whether to use slice predictor in Phase Tracker. Initial value is “11”.
“00” : Slice Prediction is OFF.
W/R “01” : not use.
“10” : not use.
“11” : Slice Prediction is ON.
Determines use of automatic gain routine and type of loop gain to be used in
Phase Tracker. Initial value is “000”.
“000” : Automatic gain change.
W/R “001” : phase tracker is OFF.
“010” : smaller gain.
“011” : normal gain.
“1xx” : not use.
Sets the operation mode
W/R
‘0’ : -60° ~ 60°
‘1’ : -45° ~ 45°
Initial value is ‘0’.
W/R Choose the value of loop gain. Initial value is ‘1’.
W/R
Choose the threshold value of loop gain when gain loop is used in automatic
mode. Initial value is ‘1’.
Address 37:
TapAddress
[7:0] [7: 0]
Filter tap address in Equalizer. Initial value is “00000000”.
W/R address 0 to address 63 : feed forward filter
address 64 to address 255 : feed back filter
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