Power Driver Integrated Full Digital Audio Amplifier
NTP-8230
low band
b‟1
Dynamic Range Compression on
Addr 0x1D : DRC Control 1
Bit
7
6
5
4
3
2
1
0
Name
X
C1C_L
X
A1C_L
Name
Description
Value
Meaning
Ref.
A1C_L
DRC attack time
(low band)
b‟000
b‟111
~
Attack time control for 1 band mode.
In 2 band mode, it will control the attack
time of low band. (See attack time table
below.)
(default = b’001)
C1C_L
DRC release time
(low band)
b’000 ~ Release time control for 1 band mode.
b‟111
In 2 band mode, it will control the release
time of low band. (See release time table
below.)
Attack time
6dB, fs = 96,000
Value of Register
011
010
001
000
111
110
101
100
30 msec
15 msec
8 msec
4 msec
2 msec
1 msec
0.5 msec
0.25 msec
Table 8. DRC Attack Time Table
Release time
6dB, fs = 96,000
5.0 sec
2.0 sec
1.0 sec
0.5 sec
0.2 sec
0.1 sec
0.05sec
Value of Register
011
010
001
000
111
110
101
100
0.025sec
Table 9. DRC Release Time Table
Addr 0x1E : DRC Control 2
Bit
7
6
5
4
3
2
1
0
Name
CPR_H
CTS_H
Name
Description
Value
Meaning
Ref.
CTS_H
DRC threshold for
high band
b’0000000 -57 ~ 12dB unsigned 7-bit DRC threshold
~
for high band.
b‟1111111
It has effect only in 2 band mode.
Refer to DRC threshold value table for
threshold values.
CPR_H
DRC enable for
high band
b’0
b‟1
Dynamic Range Compression off
Dynamic Range Compression on
Copyright ⓒ NeoFidelity, Inc.
Page 31
2011-01-11
Document Number: DS8230 draft ver. 0.1
ETC [ ETC ]
