LE58QL021BVC Zarlink, LE58QL021BVC Datasheet - Page 49

• Manufacturer Part Number: LE58QL021BVC
• Description: QUAD, SLAC, PROG CODEC, 3.3V, 20 I/0, PQT44, LEAD FREE
• Manufacturer: Zarlink

84/85h Write/Read Z Filter Coefficients (FIR and IIR)
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 Z filter is defined as:
For i = 0 to 5 and 7
Power Up and Hardware Reset (RST) Values = 0190 0190 0190 0190 0190 0190 01 0190 (Hex)
See note under Command 80/81h on
Note:
Z
increased by a gain of 1/Z
is then multiplied by Z
cludes the initial 1/Z
6
is used for IIR filter scaling only. Its value is typically greater than zero but less than or equal to one. The input to the IIR filter section is first
Command
I/O Data Byte 1
I/O Data Byte 2
I/O Data Byte 3
I/O Data Byte 4
I/O Data Byte 5
I/O Data Byte 6
I/O Data Byte 7
I/O Data Byte 8
I/O Data Byte 9
I/O Data Byte 10
I/O Data Byte 11
I/O Data Byte 12
I/O Data Byte 13
I/O Data Byte 14
I/O Data Byte 15
R/W = 0: Write
R/W = 1: Read
This command writes and reads both the FIR and IIR filter sections simultaneously.
6
gain. The theoretical effective IIR gain, without the Z
6
to normalize the overall gain. Z
z
i
6
, improving dynamic range and avoiding truncation limitations through processing within this filter. The IIR filter output
=
C1i 2
(H
Sample rate = 32 kHz
z
6
z
•
(z) = 0)
=
–
m1i
C16 2
{
page
1
•
+
–
C2i 2
m16
48.
C40
C20
C41
C21
C42
C22
C43
C23
C44
C24
C45
C25
C26
C47
C27
D
1
•
{
7
1
5
–
is the actual IIR filter gain value defined by the programmed coefficients, but it also in-
+
m2i
Zarlink Semiconductor Inc.
C26 2
H
[
1
D
z
0
z ( )
•
+
6
C3i 2
–
=
m26
49
z
•
0
m40
m20
m41
m21
m42
m22
m43
m23
m44
m24
m45
m25
m26
m47
m27
}
D
0
+
6
–
5
m3i
gain and normalization, is actually Z
z
1
•
(
1
z
–
+
1
D
0
C4i 2
4
+
z
2
•
•
z
–
C30
C10
C31
C11
C32
C12
C33
C13
C34
C14
C35
C15
C16
C37
C17
–
D
m4i
0
2
3
+
)
z
]
}
3
•
z
D
1
–
2
3
+
z
4
5
•
/Z
m30
m10
m31
m11
m32
m12
m33
m13
m34
m14
m35
m15
m16
m37
m17
D
z
0
6
1
–
.
4
+
z
------------------------------------------ -
5
R/W
1 z
•
D
z
–
0
6
•
7
z
•
7
z
•
–
1
z
–
1