82V1074PF IDT, Integrated Device Technology Inc, 82V1074PF Datasheet - Page 30

• Manufacturer Part Number: 82V1074PF
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82V1074PF

• 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: TQFP
• Operating Temperature Classification: Industrial
• Pin Count: 100
• Mounting: Surface Mount
• Operating Current: 95mA
• Operating Supply Voltage (max): 3.465V
• Operating Supply Voltage (min): 3.135V
• Lead Free Status / RoHS Status: Not Compliant

3.7
chipset also provides several additional functions such as Tone
Generation, FSK generation for Caller-ID and Universal Tone Detection.
These additional functions can be individually enabled or disabled
according to the requirements of applications.
3.7.1
Generator 1 (TG1) and Tone Generator 2 (TG2). They can be used to
generate signals such as a test tone, DTMF, dial tone, busy tone,
congestion tone and Caller-ID alerting tone etc., and output them to the
RSLIC via the ACP and ACN pins.
TG1_EN and TG2_EN in register LREG7 to 1, respectively.
amplitude values in the ROM are selected for tone generators (default:
TG1Amp = 0.94 V, TG1Freq = 852 Hz, TG2Amp = 0.94 V, TG2Freq =
1447 Hz). Otherwise, the frequency and amplitude values of TG1 and
TG2 are programmed by the Coe-RAM. The frequency and amplitude
Table - 7 Registers and Coe-RAM Locations Used for Tone Generation
3.7.1.1
voice frequency tones to signal dialing information. A DTMF signal is the
sum of two tones, one from the low frequency group (697 - 941 Hz) and
one from the high frequency group (1209 - 1633 Hz), with each group
containing four individual tones. This scheme allows 16 unique
combinations. Ten of these codes represent the numbers from zero
through nine on the telephone keypad, the rest six codes (∗, #, A, B, C,
D) are reserved for special signaling. The buttons are arranged in a
matrix, with the rows determining the low group tones, and the columns
determining the high group tone for each button.
DTMF signal can be generated by the two tone generators. By
TG Frequency and Amplitude
Coefficients Selection
TG1 Enable/Disable Bit
TG1 Amplitude Coefficient
TG1 Frequency Coefficient
TG2 Enable/Disable Bit
TG2 Amplitude Coefficient
TG2 Frequency Coefficient
RSLIC & CODEC CHIPSET
Besides the fundamental BORSCHT functions, the RSLIC-CODEC
The CODEC provides two tone generators for each channel: Tone
The TG1 and TG2 of each channel can be enabled by setting bits
If the TG bit in register LREG4 is set to 1, the default frequency and
Dual Tone Multi-Frequency (DTMF) is a signaling scheme using
Based on the scheme described in the preceding paragraph, a
Parameter
ENHANCED SIGNAL PROCESSING
TONE GENERATOR
DTMF Generation
Bit TG in LREG4
Bit TG1_EN in LREG7
Word TG1Amp in the Coe-RAM
Word TG1Freq in the Coe-RAM
Bit TG2_EN in LREG7
Word TG2Amp in the Coe-RAM
Word TG2Freq in the Coe-RAM
Register Bits/Coe-RAM Words
TG = 0: The frequency and amplitude coefficients in the Coe-RAM are selected for the tone
generators;
TG = 1: The frequency and amplitude coefficients in the ROM are selected for the tone
generators (default);
TG1_EN = 0: TG1 is disabled.
TG1_EN = 1: TG1 is enabled.
The amplitude is programmable from 0 V to 1.57 V with
(in the ROM) is 0.94 V.
The frequency is programmable from 25 to 3400 Hz. The tolerance is
±
TG2_EN = 0: TG2 is disabled
TG2_EN = 1: TG2 is enabled
The amplitude is programmable from 0 V to 1.57 V with
(in the ROM) is 0.94 V.
The frequency is programmable from 25 to 3400 Hz. The tolerance is
±
1.5% (f>200 Hz). The default frequency (in the ROM) is 852 Hz.
1.5% (f>200 Hz). The default frequency (in the ROM) is 1447 Hz.
30
coefficients can be calculated, respectively, by the following formulas:
parameter for the tone amplitude. The range of 'A' is from 0 to 1.
if A = β (0< β< 1), the amplitude will be 1.57 ∗ β (V).
tolerance is as follows:
calculated by the Cal74 software automatically. Refer to
more information about registers and Coe-RAM used for tone
generators.
2000H (high byte: 20H; low byte: 00H) to block2 word4 of the Coe-
RAM to ensure proper operation.
programming the amplitude and frequency of the tone generators
through MPI or GCI interface, the 16 standard DTMF pairs can be
generated independently in each channel. The generated DTMF tone
signals meet the frequency variation tolerances specified in the ITU-T
Q.23 recommendation.
3.7.2
sending Caller ID information. Different countries use different standards
to send Caller ID information by FSK codes. The FSK modulation of the
RSLIC-CODEC chipset is compatible with the most common standards:
BELL 202 and ITU-T V.23.
characteristics of these two standards.
f<2000 Hz, Frequency coefficient = 8191∗cos(f/8000∗2∗π)
f>2000 Hz, Frequency coefficient = 16384 - 8191∗cos(f/8000∗2∗π)
Amplitude coefficient = A∗8191∗sin(f/8000∗2∗π)
Herein, 'f' is the desired frequency of the tone. 'A' is the scaling
A = 1, corresponding to the maximum amplitude, 1.57 (V);
A = 0, corresponding to minimum amplitude, 0 (V).
It is a linear relationship between 'A' and the amplitude, which means
The frequency is programmable from 25 Hz to 3400 Hz. The
f < 200 Hz, tolerance < ± 3%;
f > 200 Hz, tolerance < ± 1.5%.
The amplitude and frequency coefficients of the tone signal can be
Note that when using the dual tone generators, users must write
The RSLIC-CODEC chipset provides an optimized FSK generator for
FSK GENERATION FOR CALLER ID
IDT82V1671/IDT82V1671A, IDT82V1074
Notes
Table - 8
±
±
1% tolerance. The default amplitude
1% tolerance. The default amplitude
shows the modulation
±
±
3% (f<200 Hz) or
3% (f<200 Hz) or
Table - 7
for