le58ql061 Zarlink Semiconductor, le58ql061 Datasheet - Page 75

• Manufacturer Part Number: le58ql061
• Description: Quad Low Voltage Subscriber Line Audio-processing Circuit
• Manufacturer: Zarlink Semiconductor

SOP 14. Write/Read Interrupt Mask Register
Mask CD Interrupt
*Power Up and Hardware Reset (RST) Value = FFh
COP (Coefficient Operation) Command
The COP command, which is a GCI command, writes or reads data related to filter coefficients. Filter coefficient data is used by
the voice processors within the QLSLAC device to configure the various filters in the voice channel. In this case, 1 to 14 coefficient
bytes follow the command byte. The QLSLAC device interprets the bytes as canonic signed digital (CSD) data and sets the
coefficients accordingly.
The QLSLAC device responds to the read coefficient command by sending up to 14 CSD bytes upstream. These bytes contain
the coefficients requested by the upstream controller. For diagnostic purposes, various RAM locations containing data to which
the QLSLAC device has access can also be read back by this command.
The generic transmission sequence for the COP command is shown in Table
The following tables show the format of the COP bytes that follow a downstream address byte.
Command
I/O Data
GCI Command
(6C/6Dh)
R/W = 0: Write
R/W = 1: Read
MCDx
MCDx
x
C
Masked
Command
Data
Data
Table 12. Generic Transmission Sequence for COP Command
C
C
= 0
= 1*
MCDB
Command byte, COP write
CDx
CDx
Bit number (A or B)
Channel number (1 through 4)
A change does not cause the Interrupt Pin to go Low.
D
Control byte, COP read
0
7
4
C
C
Downstream
ADDRESS
DATA
DATA
bit is NOT MASKED
bit is MASKED
CMD
D
m ≤ 14
MCDA
Data1
Data
7
D
•
•
1
6
m
Zarlink Semiconductor Inc.
4
DATA
DATA
CMD
D
6
MCDB
D
1
5
75
3
DATA
DATA
CMD
D
5
MCDA
D
0
4
Upstream
DATA
DATA
CMD
3
D
n ≤ 14
Data
Data
4
•
•
Table
MCDB
1
n
D
1
3
DATA
DATA
CMD
D
12.
2
3
MCDA
D
DATA
DATA
1
CMD
2
D
2
2
MCDB
DATA
DATA
CMD
D
0
D
1
1
1
MCDA
DATA
DATA
CMD
R/W
D
D
0
0
1