V-Tec AT16/C5 Dokumentacja Strona 23
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Oceniono. / 5. Na podstawie oceny klientów
Si2400
Rev. 1.3 23
5.10. Tone Generation and Tone Detection
The Si2400 provides comprehensive and flexible tone
generation and detection. This includes all tones
needed to establish a circuit connection and to set up
and control a communication session. The tone
generation furnishes the DTMF tones for PSTN auto
dialing and the supervisory tones for call establishment.
The tone detection provides support for call progress
monitoring. The detector can also be user-programmed
to recognize up to four tones and two tone detection
bandpass filters.
DTMF tones may be detected and generated by using
the “ATA0” and “ATDT!0” commands described in the
AT command section. A description of the user-
programmable tones can be found in "7.1.DSP
Registers" on page 40.
The Si2400 DTMF decoder is designed for single loop
applications such as local detection of a parallel DTMF
device. Applications requiring DTMF detection across
two loops such as programming via a remote keypad
are not supported.
5.11. PCM Data Mode
The Si2400 has the ability to bypass the modem
algorithm and send 14-bit PCM data, sampled at
9600 Hz, across the DAA. To use this mode, it is
necessary to set the serial link (DTE) rate to at least
228613 bps SE0[2:0] (SD) = 101b, set S13[0] (PCM)
=1
b
, and set SE1[7:6] (MCKR) = 00
b
. The data format
(Figure 9) requires that the high byte be sent first
containing bits D13–D7. The LSB (B0) must equal zero.
The low byte must be sent next containing bits D6–D0;
the LSB (B0) must equal one. The receive data format is
the same.
In PCM data mode, the line can be answered or
originated using the “ATDT#;” command. (The “;” is
used to keep the modem from leaving the command
mode.) When PCM data mode is enabled (set
S13[0] (PCM) = 1
b
and SE4[5:4] (DRT) = 001
b
(default)), data will immediately begin streaming into
and out of the serial port at a 9600 Hz
z
2 word rate. In
this mode, the controller will not detect dial tones or
other call progress tones. If desired, the user can
monitor these tones using manual call progress
detection prior to entering the PCM data mode.
To exit the PCM data mode, an escape must be
performed either by pulsing the ESC pin or by using 9-
bit data mode and setting the ninth bit. (TIES cannot be
used in PCM data mode.) The escape command will
disable PCM streaming, and the controller will again
accept AT style commands.
Figure 9. PCM Timing
PCM Transmit Timing
PCM Receive Timing
8-Bit Data High-Byte Low-Byte
8-Bit Data High-Byte Low-Byte
RXD
Note: Baud rates (programmed through register SEO) can be set to the following: 228613, 245760 and 307200.
D7 D8 D9 D10 D11 D12 D13
D6D5D4
D3
D2D1D0
Start
B0 B1
B2
B3 B4 B5 B6 B7 Stop
Start
B0 B1 B2 B3 B4 B5 B6 B7 Stop
TXD
D7 D8 D9 D10 D11 D12 D13
D6D5D4
D3
D2D1D0
Start
B0 B1
B2
B3 B4 B5 B6 B7 Stop
Start
B0 B1 B2 B3 B4 B5 B6 B7 Stop
- Features 1
- Applications 1
- Description 1
- Functional Block Diagram 1
- 2 Rev. 1.3 2
- TABLE OF CONTENTS 3
- 1. Electrical Specifications 4
- Table 2. Loop Characteristics 5
- Table 3. DC Characteristics 6
- Table 4. DC Characteristics 6
- Table 5. AC Characteristics 7
- for K-Grade, T 8
- –40 to 85°C for B-Grade) 8
- = –40 to 85°C for B-Grade) 9
- 10 Rev. 1.3 10
- 3. Bill of Materials 11
- 12 Rev. 1.3 12
- 4. Analog Input/Output 13
- 5. Functional Description 14
- 5.1. Digital Interface 15
- 16 Rev. 1.3 16
- 5.3. Low Power Modes 17
- 5.4. Global DAA Operation 17
- 18 Rev. 1.3 18
- Rev. 1.3 19 19
- 20 Rev. 1.3 20
- 5.6. Loop Current Detection 21
- 5.7. Carrier Detect/Loss 21
- 5.8. Overcurrent Detection 21
- 5.11. PCM Data Mode 23
- Figure 10. Signal Routing 24
- 5.12. Analog Codec 25
- 5.14. V.42 HDLC Mode 26
- 5.15. Fast Connect 27
- Table 16. MCKR Configurations 28
- 6.1. Command Line Execution 29
- 30 Rev. 1.3 30
- 6.4. S-Register Control 31
- 32 Rev. 1.3 32
- 6.5.4. A1 34
- 6.5.5. !2 34
- 6.5.6. !7 34
- Table 19. !7 Parameters 35
- Figure 12. !7 Security Timing 36
- Progress 37
- S19 S1A S1B S16 S17 S18 38
- Table 23. DTMF 39
- 7.1. DSP Registers 40
- SE8 SE6 SE5 41
- DSP Reg. Addr 41
- 7.2. Call Progress Filters 42
- 8. S Registers 43
- 44 Rev. 1.3 44
- Rev. 1.3 45 45
- 46 Rev. 1.3 46
- Rev. 1.3 47 47
- 50 Rev. 1.3 50
- Rev. 1.3 51 51
- 52 Rev. 1.3 52
- Rev. 1.3 53 53
- 54 Rev. 1.3 54
- Rev. 1.3 55 55
- 56 Rev. 1.3 56
- 58 Rev. 1.3 58
- Kissoff Tone Detect Length) 58
- Rev. 1.3 59 59
- 60 Rev. 1.3 60
- Rev. 1.3 61 61
- 62 Rev. 1.3 62
- Rev. 1.3 63 63
- Rev. 1.3 65 65
- 66 Rev. 1.3 66
- Rev. 1.3 69 69
- 70 Rev. 1.3 70
- Rev. 1.3 71 71
- 72 Rev. 1.3 72
- Rev. 1.3 73 73
- 74 Rev. 1.3 74
- Rev. 1.3 75 75
- 76 Rev. 1.3 76
- Rev. 1.3 77 77
- DAA Isolation Barrier 78
- Emissions/Immunity 78
- DC Termination 79
- AC Termination 80
- Ringer Impedance 80
- DTMF Dialing 80
- Pulse Dialing 80
- Billing Tone Detection 80
- Symbol Value 81
- In-Circuit Testing 82
- Compliance Test Commands 83
- Introduction 84
- APPENDIX C—UL1950 3RD EDITION 85
- 9. Pin Descriptions: Si2400 86
- Rev. 1.3 87 87
- 10. Pin Descriptions: Si3015 88
- Receive Input 89
- Filter 2 89
- Pin # Pin Name Description 89
- 11. Ordering Guide 90
- Millimeters 91
- Revision 1.1 to Revision 1.2 92
- Revision 1.2 to Revision 1.3 92
- Rev. 1.3 93 93
- CONTACT INFORMATION 94
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