LE58QL021BVC Zarlink, LE58QL021BVC Datasheet - Page 54

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

is then multiplied by Z
cludes the initial 1/Z
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
section is first increased by a gain of 1/Z
this filter. The IIR filter output is then multiplied by Z
the programmed coefficients, but it also includes the initial 1/Z
normalization, is actually Z
C8/C9h Write/Read Debounce Time Register
This command applies to all channels and does not depend on the state of the Channel Enable Register.
Enable E1
E1 Polarity
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
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
Command
I/O Data
R/W = 0: Write
R/W = 1: Read
This command writes/reads the IIR filter section only, without affecting the FIR.
R/W = 0: Write
R/W = 1: Read
6
gain. The theoretical effective IIR gain, without the Z
6
EE1 = 0*
EE1 = 1
E1P = 0*
E1P = 1
to normalize the overall gain. Z
5
/Z
H
Sample rate = 32 kHz
(H
6
z
z
z
.
z
z ( )
6
i
(z) = 0)
=
=
=
C1i 2
C16 2
z
page
0
E1 multiplexing turned off
E1 multiplexing turned on
E1 is a high-going pulse
E1 is a low-going pulse
6
+
•
, improving dynamic range and avoiding truncation limitations through processing within
•
z
1
–
48.
–
m1i
•
m16
EE1
C45
C25
C26
C47
C27
z
D
D
1
1
{
–
7
7
5
1
1
{
1
is the actual IIR filter gain value defined by the programmed coefficients, but it also in-
+
+
6
+
Zarlink Semiconductor Inc.
z
C2i 2
to normalize the overall gain. Z
2
C26 2
•
E1P
D
D
0
z
1
•
6
6
–
•
2
–
+
m2i
–
z
6
m26
54
3
DSH3
[
gain. The theoretical effective IIR gain, without the Z
m45
m25
m26
m47
m27
•
1
D
D
0
0
6
}
z
5
5
+
gain and normalization, is actually Z
–
C3i 2
3
+
z
DSH2
•
4
D
D
1
•
0
4
4
–
z
m3i
–
4
(
+
1
DSH1
z
------------------------------------------ -
C35
C15
C16
C37
C17
+
5
D
5
D
1
1
1 z
C4i 2
3
3
•
is the actual IIR filter gain value defined by
–
z
6
•
•
7
z
DSH0
•
–
7
D
D
z
m4i
0
0
•
2
2
–
1
z
)
–
]
1
}
5
RSVD
/Z
m35
m15
m16
m37
m17
D
D
1
0
6
1
1
.
ECH
R/W
R/W
D
D
0
0
6
gain and