Le58083
Data Sheet
86/87h Write/Read B1 Filter Coefficients
MPI Command
R/W = 0: Write
R/W = 1: Read
D7
D6
D5
D4
0
D3
D2
1
D1
D0
R/W
Command
1
0
0
0
1
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
C32
C12
C23
C34
C14
C25
C36
C16
C27
C38
C18
C29
C310
C110
m32
m12
m23
m34
m14
m25
m36
m16
m27
m38
m18
m29
m310
m110
C22
C33
C13
C24
C35
C15
C26
C37
C17
C28
C39
C19
C210
RSVD
m22
m33
m13
m24
m35
m15
m26
m37
m17
m28
m39
m19
m210
RSVD
Cxy = 0 or 1 in the command above corresponds to Cxy = +1 or −1, respectively, in the equation below.
The Z-transform equation for the B filter is defined as:
B
10 • z–10
HB(z) = B2 • z–2 + … + B9 • z–9 + --------------------------------
1 – B11 • z–1
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,
Bi = C1i • 2–mli[1 + C2i • 2–m2i(1 + C3i • 2–m3i)]
The feedback coefficient of the IIR B section is defined as
B11 = C111 • 2–m111{1 + C211 • 2–m211[1 + C311 • 2–m311(1 + C411 • 2–m411)]}
Refer to Command 96/97h for programming of the B11 coefficients.
Power Up and Hardware Reset (RST) Values = 09 00 90 09 00 90 09 00 90 09 00 90 09 00 (Hex)
HB(z) = 0
See note under Command 80/81h on page 54.
RSVD
Reserved for future use. Always write as 0, but 0 is not guaranteed when read.
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Zarlink Semiconductor Inc.
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