Le58083
Data Sheet
COP 7. Write/Read R Filter Coefficients
GCI Command
(8A/8Bh)
R/W = 1: Read
R/W = 0: Write
D7
1
D6
D5
D4
0
D3
D2
0
D1
D0
W/R
Command
0
0
1
1
Coefficient Byte 1
Coefficient Byte 2
Coefficient Byte 3
Coefficient Byte 4
Coefficient Byte 5
Coefficient Byte 6
Coefficient Byte 7
Coefficient Byte 8
Coefficient Byte 9
Coefficient Byte 10
Coefficient Byte 11
Coefficient Byte 12
Coefficient Byte 13
Coefficient Byte 14
C46
C26
C40
C20
C41
C21
C42
C22
C43
C23
C44
C24
C45
C25
m46
m26
m40
m20
m41
m21
m42
m22
m43
C23
m44
m24
m45
m25
C36
C16
C30
C10
C31
C11
C32
C12
C33
C13
C34
C14
C35
C15
m36
m16
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.
HR = HIIR • HFIR
The Z-transform equation for the IIR filter is defined as:
1 – z–1
HIIR = -----------------------------------
–1
1 – R6 • z
Sample rate = 8 kHz
The coefficient for the IIR filter is defined as:
R6 = C16 • 2–ml6{1 + C26 • 2–m26[1 + C36 • 2–m36(1 + C46 • 2–m46)]}
The Z-transform equation for the FIR filter is defined as:
H
FIR(z) = R0 + R1z–1 + R2z–2 + R3z–3 + R4z–4 + R5z–5
Sample rate = 16 kHz
For i = 0 to 5, the coefficients for the R2 filter are defined as:
Ri = C1i • 2–m1i{1 + C2i • 2–m2i[1 + C3i • 2–m3i(1 + C4i • 2–m4i)]}
Power Up and Hardware Reset (RST) Values = 2E01 0111 0190 0190 0190 0190 0190 (Hex)
(HFIR (z) = 1, R6 = 0.9902)
See note under COP Command 2 on page 80.
84
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
