Le58083
Data Sheet
88/89h Write/Read X Filter Coefficients
MPI Command
R/W = 0: Write
R/W = 1: Read
D7
D6
D5
D4
0
D3
D2
0
D1
D0
R/W
Command
1
0
0
1
0
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
C40
C20
C41
C21
C42
C22
C43
C23
C44
C24
C45
C25
m40
m20
m41
m21
m42
m22
m43
m23
m44
m24
m45
m25
C30
C10
C31
C11
C32
C12
C33
C13
C34
C14
C35
C15
m30
m10
m31
m11
m32
m12
m33
m13
m34
m14
m35
m15
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 X filter is defined as:
Hx(z) = x0 + x1z–1 + x2z–2 + x3z–3 + x4z–4 + x5z–5
Sample rate = 16 kHz
For i = 0 to 5, the coefficients for the X filter are defined as:
Xi = C1i • 2–m1i{1 + C2i • 2–m2i[1 + C3i • 2–m3i(1 + C4i • 2–m4i)]}
Power Up and Hardware Reset (RST) Values = 0111 0190 0190 0190 0190 0190 (Hex)
(HX(z) = 1)
See note under Command 80/81h on page 54.
57
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