LE58QL061BVC Zarlink, LE58QL061BVC Datasheet - Page 58

• Manufacturer Part Number: LE58QL061BVC
• Description: QUAD, SLAC, PROG CODEC, 3.3V, GCI, 20 I/0, PQT44, LEAD FREE
• Manufacturer: Zarlink

9A/9Bh Write/Read IIR Z Filter Coefficients (IIR only)
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
first increased by a gain of 1/Z
filter output is then multiplied by Z
but it also includes 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
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
MPI Command
R/W = 0: Write
R/W = 1: Read
This command writes/reads the IIR filter section only, without affecting the FIR.
Sample rate = 32 kHz
(H
z
6
z
z
i
(z) = 0)
=
=
C16 2
C1i 2
6
, improving dynamic range and avoiding truncation limitations through processing within this filter. The IIR
H
6
z
6
z ( )
gain. The theoretical effective IIR gain, without the Z
•
•
to normalize the overall gain. Z
–
–
=
m16
m1i
z
page
0
{
{
+
1
1
z
+
+
1
52.
C2i 2
C26 2
•
C45
C25
C26
C47
C27
z
D
1
–
7
•
1
•
+
–
Zarlink Semiconductor Inc.
z
m2i
–
2
m26
•
[
D
0
z
1
}
6
–
+
2
+
C3i 2
5
is the actual IIR filter gain value defined by the programmed coefficients,
z
58
3
m45
m25
m26
m47
m27
•
•
D
0
z
5
–
–
m3i
3
+
(
z
1
4
D
+
1
•
4
C4i 2
z
–
4
6
+
•
gain and normalization, is actually Z
z
------------------------------------------ -
C35
C15
C16
C37
C17
5
D
–
1
m4i
1 z
3
•
–
z
6
)
]
•
7
}
z
•
7
D
z
0
•
2
–
1
z
–
1
m35
m15
m16
m37
m17
D
1
1
R/W
D
0
5
/Z
6
.