AM79Q031 ETC1 [List of Unclassifed Manufacturers], AM79Q031 Datasheet - Page 49

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AM79Q031

Manufacturer Part Number
AM79Q031
Description
Quad Subscriber Line Audio-Processing Circuit (QSLAC) Devices
Manufacturer
ETC1 [List of Unclassifed Manufacturers]
Datasheet

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37, 38. Write/Read B1 Filter Coefficients
(86/87h)
R/W = 0: Write
R/W = 1: Read
The Z-transform equation for the B filter is defined as:
Sample rate = 16 kHz
The coefficients for the FIR B section and the gain of the IIR B section are defined as:
For i = 2 to 10,
The feedback coefficient of the IIR B section is defined as:
Refer to Commands 43, 44 for programming of the B
Power Up and Hardware Reset (
(
See note under Commands 31 and 32.
RSVD
H
Command
I/O Input Data Byte 1
I/O Input Data Byte 2
I/O Input Data Byte 3
I/O Input Data Byte 4
I/O Input Data Byte 5
I/O Input Data Byte 6
I/O Input Data Byte 7
I/O Input Data Byte 8
I/O Input Data Byte 9
I/O Input Data Byte 10
I/O Input Data Byte 11
I/O Input Data Byte 12
I/O Input Data Byte 13
I/O Input Data Byte 14
B
(
z )
=
Reserved for future use. Always write as 0, but 0 is not guaranteed when read.
H
B
B
0.254 z
i
11
B
+
z ( )
=
0.014 z
=
C1i 2
=
C111 2
B
2 –
2
z
0.891 z
mli
8
2 –
+
[
m111
+
0.013 z
1
SLAC Products
+
{
C2i 2
C310
C110
RST
+
1
C32
C12
C23
C34
C14
C25
C36
C16
C27
C38
C18
C29
3 –
D
1
B
+
7
9
C211 2
) Values = 36 AB B8 22 93 AB 2B 6C 46 2C 63 B6 9F 60 (Hex)
9 –
0.656 z
+
z
m2i
9 –
---------------------------------------- -
1 0.97656 z
D
0
+
(
6
0.016 z
1
----------------------------- -
1 B
+
B
m211
4
C3i 2
10
m310
m110
m32
m12
m23
m34
m14
m25
m36
m16
m27
m38
m18
m29
11
0.090 z
[
D
0
1
z
5
+
10
10
z
C311 2
11
1 –
m3i
1
coefficients.
)
)
D
0
]
5
4
+
0.013 z
m311
RSVD
C210
C22
C33
C13
C24
C35
C15
C26
C37
C17
C28
C39
C19
D
0
(
3
1
+
6 –
C411 2
+
0.017 z
D
1
2
MPI Command
RSVD
m411
m210
m22
m33
m13
m24
m35
m15
m26
m37
m17
m28
m39
m19
D
7 –
1
1
)
]
}
R/W
D
0
49

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