AM79Q031 ETC1 [List of Unclassifed Manufacturers], AM79Q031 Datasheet - Page 47

• Manufacturer Part Number: AM79Q031
• Description: Quad Subscriber Line Audio-Processing Circuit (QSLAC) Devices
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

30. Read Revision Code Number (RCN)
31, 32. Write/Read GX Filter Coefficients
33, 34. Write/Read GR Filter Coefficients
(73h)
(80/81h)
R/W = 0: Write
R/W = 1: Read
(82/83h)
R/W = 0: Write
R/W = 1: Read
This command returns an 8-bit number (RCN) describing the revision number of the QSLAC
device. This command does not depend on the state of the Channel Enable Register.
The coefficient for the GX filter is defined as:
Power Up and Hardware Reset (
Note: The default value is contained in a ROM register separate from the programmable coefficient RAM.
There is a filter enable bit in Operating Functions Register to switch between the default and programmed
values.
The coefficient for the GR filter is defined as:
Power Up and Hardware Reset (
See note under Commands 31 and 32.
Command
I/O Data
Command
I/O Data Byte 1
I/O Data Byte 2
Command:
I/O Data Byte 1
I/O Data Byte 2
H
H
GX
GR
=
=
1
C10 2
+
(
C10
•
RCN7
C40
C20
C40
C20
–
D
D
D
0
1
1
m10
7
7
7
•
SLAC Products
2
{
–
1
m10
+
RST
RST
RCN6
{
C20 2
D
D
1
D
1
0
0
6
6
) Values = A9F0 (Hex) (H
6
) Values = 23A1 (Hex) (H
+
•
C20 2
–
m20
RCN5
m40
m20
m40
m20
•
D
D
D
1
0
0
[
5
5
5
–
1
m20
+
C30 2
[
1
RCN4
+
D
D
D
1
0
0
•
4
4
4
C30 2
–
m30
•
RCN3
(
C30
C10
C30
C10
–
GR
D
D
GX
D
1
0
0
0
m30
3
3
3
+
= 1.995 (6 dB)).
= 0.35547 (–8.984 dB)).
C40 2
(
1
+
RCN2
•
C40 2
D
D
D
0
0
0
–
2
2
2
m40
•
MPI Command
MPI Command
MPI Command
)
–
]
m40
}
RCN1
m30
m10
m30
m10
D
D
D
1
0
1
)
1
1
1
]
}
)
RCN0
R/W
R/W
D
D
D
1
0
0
0
47