SI3220-KQ Silicon Laboratories Inc, SI3220-KQ Datasheet - Page 57

• Manufacturer Part Number: SI3220-KQ
• Description: IC SLIC/CODEC DUAL-CH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: ProSLIC®r

Specifications of SI3220-KQ

• Package / Case: *
• Function: Subscriber Line Interface Concept (SLIC), CODEC
• Interface: GCI, PCM, SPI
• Number Of Circuits: 2
• Voltage - Supply: 3.3V, 5V
• Current - Supply: 65mA
• Power (watts): 941mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Includes: Battery Switching, BORSCHT Functions, DTMF Generation and Decoding, FSK Tone Generation, Modem and Fax Tone Detection
• Product: Telecom
• Supply Voltage (min): 3.13 V
• Supply Current: 22 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Tone Generator Interrupts
Both the active and inactive timers can generate an
interrupt to signal “on/off” transitions to the software.
The timer interrupts for tone generator 1 can be
individually enabled by setting the OS1TAE and OS1TIE
bits. Timer interrupts for tone generator 2 are OS2TAE
and OS2TIE. A pending interrupt for each of the timers
is determined by reading the OS1TAS, OS1TIS,
OS2TAS, and OS2TIS bits in the IRQVEC1 register.
Caller ID Generation
The Dual ProSLIC devices generate caller ID signals in
compliance with various Bellcore and ITU specifications
as described in Table 32 by providing continuous phase
binary
Oscillator 1 is required because it preserves phase
The register and RAM locations for caller ID generation
are listed in Table 33. Caller ID data is entered into the
8-bit FSKDAT register. The data byte is double buffered
so that the Dual ProSLIC can generate an interrupt
indicating the next data byte can be written when
processing begins on the current data byte. The caller
ID data can be transmitted in one of two modes
controlled
O1FSK8 = 0 (default case), the 8-bit caller ID data is
transmitted with a start bit and stop bit to create a 10-bit
data sequence. If O1FSK8 = 1, the caller ID data is
transmitted as a raw 8-bit sequence with no start or stop
bits. The value programmed into the OSC1TA register
determines the bit rate, and the interrupt rate is equal to
Parameter
FSK Start & Stop Bit Enable
Oscillator 1 Active Timer
FSK Data Byte
FSK Frequency for Space
FSK Frequency for Mark
FSK Amplitude for Space
FSK Amplitude for Mark
FSK 0-1 Transition Freq, High
FSK 0-1 Transition Freq, Low
FSK 1-0 Transition Freq, High
FSK 1-0 Transition Freq, Low
frequency
by
Table 33. Register and RAM Locations used for Caller ID Generation
the
shift
O1FSK8
key
register
(FSK)
O1TALO/O1TAHI
Register/RAM
modulation.
bit.
FSKFREQ1
FSKFREQ0
Mnemonic
FSKAMP0
FSKAMP1
FSK01LO
FSK10LO
FSK01HI
FSK10HI
FSKDAT
OMODE
Preliminary Rev. 0.91
When
continuity during frequency shifts whereas Oscillator 2
does not. Figure 37 illustrates a typical caller ID
transmission sequence in accordance with Bellcore
requirements.
Parameter
Mark Frequency (logic 1)
Space Frequency (logic 0)
Transmission Rate
the bit rate divided by the data sequence length (8 or 10
bits).
Pulse Metering Generation
The Si3220 offers an additional tone generator to
generate tones above the audio frequency band. This
oscillator generates billing tones which are typically
12 kHz or 16 kHz. The generator follows the same
algorithm as described in "Tone Generator Architecture"
on page 53 with the exception that the sample rate for
computation is 64 kHz instead of 8 kHz. The equation is
as follows:
Register/RAM Bits
Table 32. FSK Modulation Requirements
FSKFREQ0[15:3]
FSKFREQ1[15:3]
FSKAMP0[15:3]
FSKAMP1[15:3]
FSK01LO[15:3]
FSK10LO[15:3]
FSK01HI[15:3]
FSK10HI[15:3]
OSC1TA[15:0]
FSKDAT[7:0]
O1FSK8
Coeff = cos (2 π f / 64000 Hz)
PMFREQ = coeff x (2
Si3220/Si3225
Description/Range
0 to 8.19 s/125 µ s
ITU-T V.23 Bellcore GR-
Enable/disable
1300 Hz
2100 Hz
Caller ID data
Audio range
Audio range
14
1200 baud
– 1)
30-CORE
1200 Hz
2200 Hz
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