821054PQF Integrated Device Technology (Idt), 821054PQF Datasheet - Page 31

• Manufacturer Part Number: 821054PQF
• Description: Audio Codec 4ADC / 4DAC 64-Pin PQFP
• Manufacturer: Integrated Device Technology (Idt)
• Type: PCMr

Specifications of 821054PQF

• Package: 64PQFP
• Number Of Channels: 4ADC /4 DAC
• Number Of Dacs: 4
• Operating Supply Voltage: 5 V

IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
3.4.3
LREG1: Coefficient Selection, Read/Write (00H/80H)
LREG2: Local Loopback Control and SLIC Input Interrupt Enable, Read/Write (01H/81H)
LOCAL REGISTERS LIST
The Coefficient Select bits (CS[7:0]) are used to control digital filters and function blocks on each channel. The digital filters include
Impedance Matching Filter, Echo Cancellation Filter, High-Pass Filter, Gain for Impedance Scaling, Gain in the Transmit/Receive Path
and Frequency Response Correction in the Transmit/Receive Path. See
Impedance Matching Filter and Gain for Impedance Scaling are working together to adjust the impedance. So the CS[0] and CS[2] bits
should be set to the same value to ensure proper operation.
CS [7] = 0: The Digital Gain Filter in the Receive path (GRX) is disabled (default);
CS [7] = 1: The Digital Gain in the Receive path (GRX) is programmed by the Coe-RAM.
CS [6] = 0: The Frequency Response Correction filter in the Receive path (FRR) is disabled (default);
CS [6] = 1: The coefficient of the Frequency Response Correction filter in the Receive path (FRR) is programmed by the Coe-RAM.
CS [5] = 0: The Digital Gain Filter in the Transmit path (GTX) is disabled (default);
CS [5] = 1: The Digital Gain in the Transmit path (GTX) is set by the Coe-RAM.
CS [4] = 0: The Frequency Response Correction filter in the Transmit path (FRX) is disabled (default);
CS [4] = 1: The coefficient of the Frequency Response Correction filter in the Transmit path (FRX) is programmed by the Coe-RAM.
CS [3] = 0: The High-Pass Filter (HPF) is bypassed/disabled;
CS [3] = 1: The High-Pass Filter (HPF) is enabled (default).
CS [2] = 0: The Gain for Impedance Scaling filter (GIS) is disabled (default);
CS [2] = 1: The coefficient of the Gain for Impedance Scaling filter (GIS) is programmed by the Coe-RAM.
CS [1] = 0: The Echo Cancellation Filter (ECF) is disabled (default);
CS [1] = 1: The coefficient of the Echo Cancellation Filter (ECF) is programmed by the Coe-RAM.
CS [0] = 0: The Impedance Matching Filter (IMF) is disabled (default);
CS [0] = 1: The coefficient of theImpedance Matching Filter (IMF) is programmed by the Coe-RAM.
The SLIC Input Interrupt Enable bits IE[4:0] enable or disable the interrupt signal on each channel.
IE[4] = 0: Interrupt disabled. The interrupt generated by changes of SB3 (when SB3 is selected as an input) will be ignored (default);
IE[4] = 1: Interrupt enabled. The interrupt generated by changes of SB3 (when SB3 is selected as an input) will be recognized.
IE[3] = 0: Interrupt disabled. The interrupt generated by changes of SB2 (when SB2 is selected as an input) will be ignored (default);
IE[3] = 1: Interrupt enabled. The interrupt generated by changes of SB2 (when SB2 is selected as an input) will be recognized.
IE[2] = 0: Interrupt disabled. The interrupt generated by changes of SB1 (when SB1 is selected as an input) will be ignored (default);
IE[2] = 1: Interrupt enabled. The interrupt generated by changes of SB1 (when SB1 is selected as an input) will be recognized.
IE[1] = 0: Interrupt disabled. The interrupt generated by changes of SI2 will be ignored (default);
IE[1] = 1: Interrupt enabled. The interrupt generated by changes of SI2 will be recognized.
IE[0] = 0: Interrupt disabled. The interrupt generated by changes of SI1 will be ignored (default);
Command
Command
I/O data
I/O data
CS[7]
R/W
R/W
IE[4]
b7
b7
CS[6]
IE[3]
b6
b6
0
0
CS[5]
IE[2]
b5
b5
0
0
CS[4]
IE[1]
31
b4
b4
0
0
CS[3]
IE[0]
b3
b3
Figure - 4 on page 11
0
0
DLB_PCM
CS[2]
b2
b2
0
0
INDUSTRIAL TEMPERATURE RANGE
for details. It should be noted that the
ALB_1BIT
CS[1]
b1
b1
0
0
DLB_1BIT
CS[0]
b0
b0
0
1