IDT82V1671AJ IDT, Integrated Device Technology Inc, IDT82V1671AJ Datasheet - Page 74

• Manufacturer Part Number: IDT82V1671AJ
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT82V1671AJ

• Number Of Channels: 4
• On-hook Transmission: Yes
• Polarity Reversal: Yes
• On-chip Ring Relay Driver: Yes
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: PLCC
• Operating Temperature Classification: Industrial
• Pin Count: 28
• Mounting: Surface Mount
• Operating Current: 95mA
• Operating Supply Voltage (max): 3.465V
• Operating Supply Voltage (min): 3.135V
• Lead Free Status / RoHS Status: Compliant

RSLIC & CODEC CHIPSET
LREG4: Coefficient Selection, Read/Write (03H/83H)
LREG5: Coefficient Selection and Filter Control Register, Read/Write (04H/84H)
This register determines whether the default values or the coefficients in Coe-RAM is selected for the programmable filters, tone genera-
tors and DC offset compensation.
FRR
GRX
FRX
GTX
TG
ECF
IMF
DC_OFT
V90
HPF
Command
Command
I/O data
I/O data
CUTOFF = 0:
CUTOFF = 1:
Coefficient selection for the Frequency Response correction in the Receive path
FRR = 0:
FRR = 1:
Coefficient selection for the digital Gain filter in the Receive path
GRX = 0:
GRX = 1:
Coefficient selection for the Frequency Response correction in the Transmit path
FRX = 0:
FRX = 1:
Coefficient selection for the digital Gain filter in the Transmit path
GTX = 0:
GTX = 1:
Coefficient selection for the Tone Generators (TG1 and TG2)
TG = 0:
TG = 1:
Coefficient selection for the Echo Cancellation filter
ECF = 0:
ECF = 1:
Coefficient selection for the Impedance Matching filter
IMF = 0:
IMF = 1:
Compensation value selection for the Offset Register
DC_OFT = 0:
DC_OFT = 1:
V90 filter characteristic enable. The bit is used to select the filter characteristic of the lowpass filter in voice signal path.
The V90 filter characteristic may be selected for a modem transmission to improve the transmission rate and
performance.
V90 = 0:
V90 = 1:
Enable/disable the highpass filter
FRR
R/W
R/W
V90
b7
b7
GRX
HPF
b6
b6
0
0
disabled, the PCM receive path is in normal operation (default);
enabled, the PCM receive path is cut off.
coefficient in the Coe-RAM is selected;
the frequency response correction in the receive path is disabled (default).
coefficient in the Coe-RAM is selected;
the digital gain in the receive path is 0 dB (default).
coefficient in the Coe-RAM is selected;
the frequency response correction in the transmit path is disabled (default).
coefficient in the Coe-RAM is selected;
the digital gain in the transmit path is 0 dB (default).
coefficient in the Coe-RAM is selected;
coefficient in the ROM is selected (default)
(The default values are: TG1Amp = 0.94 V, TG1Freq = 852 Hz, TG2Amp = 0.94 V, TG2Freq = 1447
Hz).
coefficient in the Coe-RAM is selected;
the echo cancellation filter is disabled (default).
coefficient in the Coe-RAM is selected;
the impedance matching filter is disabled (default).
the compensation value in the Coe-RAM is used;
the DC offset compensation value in the ROM (which is 0) is used (default).
The V90 filter is enabled;
The V90 filter is disabled (default);.
LM_B
FRX
b5
b5
0
0
LM_N
GTX
74
b4
b4
0
0
UTD
TG
b3
b3
0
0
Signaling
ECF
b2
b2
0
1
IDT82V1671/IDT82V1671A, IDT82V1074
DC_FEED
IMF
b1
b1
1
0
DC_OFT
RG
b0
b0
1
0