Power Driver Integrated Full Digital Audio Amplifier
NTP-8230
B. ROM address for BiQuads Coefficients and Parameters (Refer to Reg 0x7E)
CH1&CH2 BiQuad Coefficients & Parameters
The value of Reg 0x7E should be 0x01, 0x02 to program BiQuad coefficients and parameters only for
channel 1 and channel 2, respectively. In case of Reg 0x7E = “0x03”, same values will be applied to
channel 1 and 2.
Caution!
To program one BiQuad filter, five coefficients (b0,b1,b2,a1,a2) should be written
consecutively in incremental address. Otherwise, the chip may be in malfunction mode. Same rule
will be applied for channel 3 and Tone Control programming.
REG 0x7E
CH2 only
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
Address
(decimal) (hexadecimal)
Address
description
default in hex
CH1 only
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
0x01
Both
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
x03
0
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x21
0x22
0x23
0x24
FBQ1 b0
FBQ1 b1
FBQ1 b2
FBQ1 a1
FBQ1 a2
FBQ2 b0
FBQ2 b1
FBQ2 b2
FBQ2 a1
FBQ2 a2
3D BQ1 b0
3D BQ1 b1
3D BQ1 b2
3D BQ1 a1
3D BQ1 a2
3D BQ2 b0
3D BQ2 b1
3D BQ2 b2
3D BQ2 a1
3D BQ2 a2
PBQ1 b0
PBQ1 b1
PBQ1 b2
PBQ1 a1
PBQ1 a2
PBQ2 b0
PBQ2 b1
PBQ2 b2
PBQ2 a1
PBQ2 a2
PBQ3 b0
PBQ3 b1
PBQ3 b2
PBQ3 a1
PBQ3 a2
PBQ4 b0
PBQ4 b1
0x11000000
0x20000000
0x20000000
0x20000000
0x20000000
0x11000000
0x20000000
0x20000000
0x20000000
0x20000000
0x11000000
0x20000000
0x20000000
0x20000000
0x20000000
0x11000000
0x20000000
0x20000000
0x20000000
0x20000000
0x11000000
0x20000000
0x20000000
0x20000000
0x20000000
0x11000000
0x20000000
0x20000000
0x20000000
0x20000000
0x11000000
0x20000000
0x20000000
0x20000000
0x20000000
0x11000000
0x20000000
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Copyright ⓒ NeoFidelity, Inc.
Document Number: DS8230 draft ver. 0.1
Page 43
2011-01-11