Silicon Laboratories Si2415 Especificaciones

Rev. 0.9 2/06 Copyright © 2006 by Silicon Laboratories AN93AN93Si2493/Si2457/Si2434/Si2415/Si2404 Modem Designer’s Guide1. IntroductionThis applicati

AN9310 Rev. 0.9EECLK/D5/RXCLKDCD_/D4ESC/D3AOUT/INT_TXD/WR_RESET_RXD/RD_CTS_/CS_/ALE_alt_RI_/D6/TXCLKINT_/D0RI_/D1EESD/D2CLKOUT/A0/EECSRTS_/D7VDDRINGTI

AN93100 Rev. 0.9Figure 18. Asychronous UART Serial Interface Timing DiagramThe DCD and RI pins can be used as a hardware monitor of carrier detect and

AN93Rev. 0.9 101.Figure 19. UART Serial Interface3.4.4. Parallel Interface(24-Pin TSSOP Only)The parallel interface is intended for applications where

AN93102 Rev. 0.9The parallel interface uses the FIFOs to buffer data inthe same way as serial mode. The main difference isthe additional control pins,

AN93Rev. 0.9 103Bit 2 (ESC) is a read/write bit that is functionallyequivalent to the ESC pin in the serial mode. Theoperation of this bit, like the E

AN93104 Rev. 0.9Figure 20. Parallel Interface11 Bitsto Data BusCONTROLParallel I/FRegister 1MUXParallel I/FRegister 0A0(3)D0(16)D1(17)D2(18)D3(22)D4(2

AN93Rev. 0.9 1053.5. Programming ExamplesThe following programming examples are intended to facilitate the evaluation of various modem features and s

AN93106 Rev. 0.9PCM/Voice 3, 4, 24, 18, 12 :U*YU71Power Control &Z 24 U6E[2, 1:0], U65[13]Pulse Dialing D 6, 8, 14 U37–U45, U4EQuick connect +PQC+

AN93Rev. 0.9 1073.5.1. PCM/Voice Mode (24-Pin TSSOP Only)The Si3000 is used in conjunction with the Si2493/57/34/15/04 to transmit and receive 16-bit

AN93108 Rev. 0.9Figure 22. Si2457/Si3000 ConnectionTo use voice mode, registers U71 and U59 must beproperly configured.Setting U59 = 0001h enables the

AN93Rev. 0.9 109Table 76. Voice CommandsAT Commands PurposesAT:U71,11 Tell modem send/receive data in linear mode

AN93Rev. 0.9 112.2.3. Power Supply and Bias Circuitry (Si2493/57/34/15/04)Power supply bypassing is important for the properoperation of the Si2493/57

AN93110 Rev. 0.93.5.2. Voice Mode ExamplePerform the following steps:1. Connect hardware as shown in Figure 22. If using the Si3000 SSI EVB evaluation

AN93Rev. 0.9 1113.5.3. SMS SupportShort Message Service (SMS) is a service that allowstext messages to be sent and received from onetelephone to anoth

AN93112 Rev. 0.9To transmit Protocol 1 or Protocol 2 data, the host mustsend “AT+FTM = 201” or “AT+FTM = 202”. This causesthe modem to return to data

AN93Rev. 0.9 113The SAS tone varies between countries and requiresconfiguration of the user registers, U9F–UA9. TheSAS_FREQ (U9F) register sets the ex

AN93114 Rev. 0.9Table 82 defines the SAS cadence for each supported country. The on-time is listed in bold. This data was obtainedfrom the ITU-T Recom

AN93Rev. 0.9 115BrazilWaiting Tone 425 0.05 – 1.0U9F = 0x0003UA0 = 0x0005UA1 = 0x0064British Virgin IslandsWaiting Tone 440 0.5 – 10.0 – 0.5U9F = 0x00

AN93116 Rev. 0.9EstoniaCall Waiting Tone950/1400/1800 3×(0.33 – 0.3)U9F = 0x0007EthiopiaCall Waiting Tone425 0.2 – 0.6U9F = 0x0003UA0 = 0x0014UA1 = 0x

AN93Rev. 0.9 117Hong KongCall Waiting Tone440 3×(0.5 – 0.5) – 8.0)U9F = 0x0000UA0 = 0x0032UA1 = 0x0032UA2 = 0x0032UA3 = 0x0032UA4 = 0x0032UA5 = 0x0352

AN93118 Rev. 0.9Call Waiting Tone Ii400×16/400 0.1 – 0.1 – 0.1 – 3.0U9F = 0x0001UA0 = 0x000AUA1 = 0x000AUA2 = 0x000AUA3 = 0x012CCall Waiting Tone Iii4

AN93Rev. 0.9 119MacauCall Waiting Tone425 0.2 – 0.6U9F = 0x0001UA0 = 0x0014UA1 = 0x003CMadagascarCall Waiting Tone440 0.1 – 1.9U9F = 0x0000UA0 = 0x000

AN9312 Rev. 0.92.2.8. Ringer NetworkR7 and R8 comprise the ringer network. Thesecomponents determine the modem’s on-hookimpedance at TIP and RING. The

AN93120 Rev. 0.9NigeriaCall Waiting Tone400 2.0 – 0.2U9F = 0x0001UA0 = 0x00C8UA1 = 0x0014OmanWaiting Tone 425 0.3 – 1.0U9F = 0x0003UA0 = 0x001EUA1 = 0

AN93Rev. 0.9 121Saudi ArabiaCall Waiting Tone425 0.15 – 0.2 – 0.15 – 10.0U9F = 0x0003UA0 = 0x000FUA1 = 0x0014UA2 = 0x000FUA3 = 0x03E8Sierra LeoneWaiti

AN93122 Rev. 0.9TurkeyCall Waiting Tone450 0.2 – 0.6 – 0.2 – 8.0U9F = 0x0005UA0 = 0x0014UA1 = 0x003CUA2 = 0x0014UA3 = 0x0320Turks and Caicos IslandsWa

AN93Rev. 0.9 1233.5.5. Intrusion/Parallel Phone Detection ExampleThe modem may share a telephone line with a variety ofother devices, particularly tel

AN93124 Rev. 0.9To prevent polarity reversals from being detected as aloss of loop current, a debounce timer controlled by U-registers 50 and 51 is us

AN93Rev. 0.9 125To set the Si2457 to monitor loop current in the off-hookstate, the host issues the following commands:3.5.10. Overcurrent Detection E

AN93126 Rev. 0.9If an OK (dial tone present) was received after theATDTW;<cr>, the line requires pulse dialing. Pulse dialthe entire telephone n

AN93Rev. 0.9 1273.5.16. HDLC Example: Bit Errors on a Noisy LineBit errors can occur on an impaired line. The problem lies in determining and ignoring

AN93128 Rev. 0.9Beginning of Packet19 B0A spurious byte received with > 6 mark bits in a row, the modem is looking for HDLC flags.19 B2 HDLC flag d

AN93Rev. 0.9 12919 B2 A 1-bit error is received in an HDLC flag, the modem assumes a new single-byte packet. Since a 1-byte packet is invalid, 19 B2 i

AN93Rev. 0.9 1301632486480961121280 163248648096112128Tip/Ring Voltage (Volts)LVS BitsFigure 3. Typical Loop Voltage LVS Transfer Function

AN93130 Rev. 0.9The following steps will allow the spurious data and bit errors to be eliminated while preserving the valid data.1. Ignore 19 B0.2. Us

AN93Rev. 0.9 131If the server refuses to grant a modem-on-hold request, the modem will use the +PMHT setting to determine whatto do. If +PMHT = 0, the

AN93132 Rev. 0.93.5.17.2. Receiving Modem-On-Hold RequestsIf Modem-on-hold is enabled via the +PMH=1command, the Si2493 may be placed on hold by arem

AN93Rev. 0.9 1333.5.19. TestingThis section contains information about using theSi2493/57/34/15/04 built-in self-test features andsuggestions for boar

AN93134 Rev. 0.9component values were installed and that there are nomanufacturing problems, such as solder bridges, coldsolder joints, or missing com

AN93Rev. 0.9 135Table 91. Test CoverageCircuit or Function &T2 &T3 Functional TestSi2493/57/34/15/04 chip Yes Yes YesISOcap™ Operation Yes Yes

AN93136 Rev. 0.9Homologation testing requires that the Si2493/57/34/15/04 signal output be measured for each modulation anddata rate. The AT&T3 co

AN93Rev. 0.9 1373.5.19.3.1. Emissions/ImmunityThe Si2493/57/34/15/04 chipset and recommendedDAA schematic are fully compliant with and pass allintern

AN93138 Rev. 0.93.5.19.5. 8 kV SurgeUse the reference design with through-hole Y1capacitors for C1, C2, C8, and C9. Use spacingbetween the capacitor

AN93Rev. 0.9 1393.5.20.3. Caller IDThe ISOmodem supports all major caller ID (CID) types.CID is disabled (+VCID = 0) when the modem is in thedefault

AN9314 Rev. 0.903264961281601922242560 163248648096112128144Loop Curr e nt (m A)LCS BitsILIM = 1ILIM = 0Figure 4. Typical Loop Current LCS Transfer Fu

AN93140 Rev. 0.9Table 97. International Call Progress RegistersRegister Value FunctionDial Tone ControlU0–U14 Dial Tone Detect Filter Coeffi-cientsU15

AN93Rev. 0.9 1413.5.20.4. DC TerminationThe ISOmodem offers a great deal of flexibility in settingdc termination. Several bits can be used to adapt t

AN93142 Rev. 0.93.5.20.7. Country Parameters TableAlgeria*AT+GCI=2EAT:U35,10E0AT:U46,9B0AT:U62,904Argentina*AT+GCI=51AT:U46,680AT:U52,1ATS007=50Armen

AN93Rev. 0.9 143Brunei* AT+GCI=9CBulgariaAT+GCI=1BAT:U35,10E0AT:U46,9B0AT:U62,904Canada AT+GCI=20Caribbean DefaultsChile*AT+GCI=73AT:U49,28,83ATS007=1

AN93144 Rev. 0.9Egypt*AT+GCI=6CAT:U35,10E0AT:U62,904,33AT:U67,208ATS006=3El Salvador DefaultsEcuador AT+GCI=35Estonia(EU)*AT+GCI=2EAT:U35,10E0AT:U46,9

AN93Rev. 0.9 145Greece (EU)AT+GCI=46AT:U14,7AT:U35,10E0AT:U46,9B0AT:U4F,64AT:U52,2AT:U62,904ATS006=3Guadeloupe*AT+GCI=1BAT:U62,904Guam DefaultsHong Ko

AN93146 Rev. 0.9Italy (EU)AT+GCI=59AT:U14,7AT:U35,10E0AT:U46,9B0AT:U4F,64AT:U52,2AT:U62,904ATS006=3Japan AT+GCI=0Jordan*AT+GCI=16AT:U49,22,7AKazakhsta

AN93Rev. 0.9 147Luxembourg (EU)AT+GCI=69AT:U14,7AT:U35,10E0AT:U46,9B0AT:U4F,64AT:U52,2AT:U62,904ATS006=3Macao DefaultsMalaysiaAT+GCI=6CAT:U46,A80Malta

AN93148 Rev. 0.9Norway (CTR-21)AT+GCI=82AT:U14,7AT:U35,10E0AT:U46,9B0AT:U4F,64AT:U52,2AT:U62,904ATS006=3Oman* AT+GCI=89Pakistan*AT+GCI=89AT:U46,8A0Par

AN93Rev. 0.9 149Saudi Arabia DefaultsSingapore AT+GCI=9CSlovakia(EU)*AT+GCI=73AT:U35,10E0AT:U47,5A,5AAT:U62,904,33AT:U67,208Slovenia(EU)*AT+GCI=2EAT:U

AN93Rev. 0.9 152.2.11. Hookswitch and DC TerminationThe hookswitch and dc termination circuitry are shownin Figure 2 on page 10. Q1, Q2, Q3, Q4, R5. R

AN93150 Rev. 0.9Syria*AT+GCI=16AT:U49,22,7ATaiwanAT+GCI=FEAT:U67,8Thailand*AT+GCI=6CAT:U46,240AT:U67,4Tunisia*AT+GCI=51AT:U46,680AT:U52,1ATS007=50Turk

AN93Rev. 0.9 151APPENDIX A—ISOMODEM® LAYOUT GUIDELINES (Si3018/10)Layout GuidelinesThe key to a good layout is proper placement ofcomponents. It is be

AN93152 Rev. 0.9a.Space U2, Q4, Q5, R1, R3, R4, R10 and R11 away from each other for best thermal performance.b.The tightest layout can be achieved by

AN93Rev. 0.9 153Figure 28. Illustrated Layout Guidelines+RINGTIP4A4B4C4D4E4F4G4F563A3C 3E3B3A3E3E3E3E7A7B 7C 7C7B7B9A10101112121212118C8D8D9B9C9C9C11

AN93154 Rev. 0.9Si2493/57/34/15/04 Layout Check ListTable 101 is a checklist that the designer can use during the layout process to ensure that all th

AN93Rev. 0.9 15515The traces from the RJ11 through R7 and R8 to U2 pin 8 and pin 9 should be well matched. These traces may be up to 10 cm long.16Dist

AN93156 Rev. 0.9Module Design and Application ConsiderationsModem modules are more susceptible to radiated fieldsand ESD discharges than modems routed

AN93Rev. 0.9 157APPENDIX B—PROTOTYPE BRING-UP GUIDE (Si3018/10)IntroductionThis appendix provides tips for the debugging of initialprototypes. Althoug

AN93158 Rev. 0.9within 200 ms after the carriage return. The reset recovery time (the time between a hardware reset or the carriage return of an ATZ c

AN93Rev. 0.9 15915-side pad leaving the other end of C1 unconnected.Next, solder a short jumper wire from the unconnectedside of C1 on the evaluation

AN9316 Rev. 0.92.2.13. Ringer Impedance and ThresholdThe ring detector in many DAAs is ac coupled to the linewith a large 1 µF, 250 V decoupling capac

AN93160 Rev. 0.9Figure 31. Test the Prototype ModemFigure 32. Test the Prototype Si3018/10 CircuitryHostControllerHostUARTSi24xx Si3018 DiscretesRS232

AN93Rev. 0.9 161Figure 33. Verify Prototype Si3018/10 FailureFigure 34. Si3018/10 Typical VoltagesToPhoneLineHostControllerHostUARTSi24xx Si3018 Discr

AN93162 Rev. 0.9Table 102. Resistance to Si3018/10 Pin 15Si3018/10 ResistancePin 1 >6 MΩPin 2 >5 MΩPin 3 >2 MΩPin 4 1 MΩPin 5 >5 MΩPin 6 &

AN93Rev. 0.9 163Table 103. Resistance across ComponentsSi3018/10 ResistanceFB1 <1FB2 <1RV1 >20 MΩR1 1.07 kΩR2 150R3 3.65 kΩR4 2.49 kΩR5 100 k

AN93164 Rev. 0.9Table 104. Voltage across Components with Diode CheckerComponent VoltageQ1, Q3, Q4, Q5Base to EmitterBase to CollectorVerifies transis

AN93Rev. 0.9 165APPENDIX C—Si3008 SUPPLEMENTSi3008 IntroductionThe Si3008 is a small form factor line-side device with areduced peripheral component c

AN93166 Rev. 0.9A feature comparison between the Si3018/10 and the Si3008 is presented in Table 106. This table is designed topresent a quick capabili

AN93Rev. 0.9 167The Si3008 meets the DTMF and pulse dialing requirements for the countries in Table 105. Higher DTMF signallevels than those required

AN93168 Rev. 0.9Figure 36. DC/IV CharacteristicsReference DesignThe Si3008 requires fewer peripheral components (in particular, fewer expensive high-v

AN93Rev. 0.9 169GPIO1/EOFRGPIO2/CD_GPIO3/ESCGPIO4/AOUT/INT_TXDRESET_RXDCTS_GPIO5/RI_VDDTIPRINGExternalcrystaloptionEmissionsoptionPlease submit layout

AN93Rev. 0.9 17include a costly LC filter internal to the modem when itmay only be necessary to support a few countries/customers.Alternatively, when

AN93170 Rev. 0.9Bill of Materials: Si24xx Daughter CardTable 109. Bill of Materials: Si24xx Daughter CardItem Qty Reference Value Rating Tolerance Foo

AN93Rev. 0.9 171Layout GuidelinesThe key to a good layout is the proper placement ofcomponents. It is best to copy the placement shown onour evaluatio

AN93172 Rev. 0.9Table 110. Si2493/57/34/15/04/Si3008 Layout Checklist3# Layout Requirement1Place U1 and U3 so pins 9-16 of U1 are facing pins 1-4 of U

AN93Rev. 0.9 173Figure 38. Daughter Card Component Side

AN93174 Rev. 0.9Figure 39. Daughter Card Solder Side Silkscreen

AN93Rev. 0.9 175Figure 40. Daughter Card Component Side Layout

AN93176 Rev. 0.9Figure 41. Daughter Card Ground Plane

AN93Rev. 0.9 177Figure 42. Daughter Card Power Plane

AN93178 Rev. 0.9Figure 43. Daughter Card Solder Side Layout

AN93Rev. 0.9 179Module Design and ApplicationConsiderationsModem modules are more susceptible to radiated fieldsand ESD discharges than modems routed

AN9318 Rev. 0.92.3. Typical Application SchematicEECLK/D5/RXCLKDCD_/D4ESC/D3AOUT/INT_TXD/WR_RESET_RXD/RD_CTS_/CS_/ALE_alt_RI_/D6/TXCLKINT_/D0RI_/D1EE

AN93180 Rev. 0.9Si2493/57/34/15/04/Si3008Prototype Bring-Up Guide**Note: Pin numbers refer to FS package.This section provides help with the debuggin

AN93Rev. 0.9 181Si3008 Troubleshooting section.If the modem does not go off-hook and draw loop current as a result of giving the ATH1 command and rece

AN93182 Rev. 0.9If the connection attempt is not successful, the problemlies with the Si3008 and/or associated components.Proceed to " Si3008 Tro

AN93Rev. 0.9 183Figure 46. Test the Prototype ModemFigure 47. Test the Prototype Si3008 CircuitryHost ControllerHost UARTSi24xx Si3008 DiscretesRS232

AN93184 Rev. 0.9Figure 48. Verify Prototype Si3008 FailureFigure 49. Si3008 Typical VoltagesFigure 50. Si3008 In-Circuit Resistance to IGND (Si3008 Pi

AN93Rev. 0.9 185Table 111. Resistance across ComponentsSi3008 Circuit Component ResistanceFB1 <1 ΩFB2 <1 ΩRV1 >10 MΩR1 206 ΩR2 243 ΩR4 3.8 kΩ

AN93186 Rev. 0.9APPENDIX D—EPOS APPLICATIONSIn general, EPOS applications require nearly flawless call connection reliability and a very short overall

AN93Rev. 0.9 187Another consideration for EPOS applications is themethod of error detection and error correction. EarlyEPOS terminals adopted the use

AN93188 Rev. 0.9In the end, the only thing that matters in an EPOS application is the ability to send and receive HDLC framesacross the DTE. For this,

AN93Rev. 0.9 189Figure 51. ISOModem V80 Protocol HDLC Framing in Framed Sub-ModeISOmodems in EPOS Applications* AT:U87[10] must be set when using Rev

AN93Rev. 0.9 192.3.1. Bill of Materials: Si2493/57/34/15/04 ChipsetComponent Value Supplier(s)C1, C2 33 pF, Y2, X7R, ±20% Panasonic, Murata, VishayC3

AN93190 Rev. 0.9When to Use Audio RecordingThis technique is best used when the modem appearsto connect normally against some servers but does notconn

AN93Rev. 0.9 191Setting PC Microphone Input for Recording (Windows NT)Use the following procedure:1. Click Start->Settings->Control Panel->So

AN93192 Rev. 0.9Setting PC Microphone Input for Recording (Windows 98)Use the following procedure:1. Select Start->Settings->Control Panel->M

AN93Rev. 0.9 193Setting PC Microphone Input for Recording (Windows XP)Use the following procedure:1. Select Start->Control Panel->Multimedia Pro

AN93194 Rev. 0.9Making the Recording with Windows Sound Recorder (Windows XP, NT or Windows 98)Use the following procedure:1. Click Start->Program

AN93Rev. 0.9 195Audio Playback and AnalysisAn analysis software package that is capable ofshowing the spectral contents as they change over timeis rec

AN93196 Rev. 0.9Figure 59. Adobe Audition Spectral View of a Good V.22 TransactionAn important parameter that is not obvious at firstglance is the res

AN93Rev. 0.9 197Figure 60. 256 Band Spectral DisplayFigure 61. 2048 Band Spectral Display

AN93198 Rev. 0.9Poor Audio RecordingsIf an audio recording is not done correctly, it will not help debug the communication protocol. The following are

AN93Rev. 0.9 199Details of Some Low Speed ProtocolsThe following annotated recordings are shown to give very fundamental views of what to expect the E

AN932 Rev. 0.9

AN9320 Rev. 0.92.3.2. Analog OutputFigure 8 illustrates an optional application circuit to support the analog output capability of the Si2493/57/34/15

AN93200 Rev. 0.9Figure 66. Appearance of V.22 bis ProtocolThis looks the same as the V.22 bis protocol above except for S1 signal used for signaling V

AN93Rev. 0.9 201As shown in Figure 68, the V29FastPOS protocol looks different than the older, slower, V.22-like protocols. It isalso half-duplex, and

AN93202 Rev. 0.9Figure 69. Examples of EPOS Server Misbehavior A V22 bis serverwith unpredictableand undesirablegaps during the USB1 signal.A V22 bis

AN93Rev. 0.9 203Figure 70. Example of EPOS Server MisbehaviorThe Answer Toneis too short at 400 ms.Innocent, answermodem generated,guard tone.

AN93204 Rev. 0.9Examples of Line ImpairmentsDTMF Distorted by Low Line LevelFigure 71. Defective DTMFFigure 72. Normal DTMFSolutions: Fix phone line.

AN93Rev. 0.9 205Power Line Related NoiseFigure 73. Odd Harmonics of 50 Hz Manifest as Horizontal Lines Spaced at 100 HzCauses: Unbalanced Phone Line

AN93206 Rev. 0.9AM Band InterferenceThis is a situation that one cannot see in the audio recordings. In certain areas, the symptoms include poorconnec

AN93Rev. 0.9 207Debugging the DTE interfaceA hardware-based serial RS232 monitoring product, such as the "Parascope Plus", is an invaluable

AN93208 Rev. 0.9Optimizing the Patch Loading TimeIn some cases, patch files may consist of more than6000 characters. They come in a .txt file containi

AN93Rev. 0.9 209Note that the delay times shown may be very short and do not include the time to empty the UART's potentiallylong TX buffer. The

AN93Rev. 0.9 213. Software Design ReferenceThis section provides information about the architectureof the modem, functional blocks, registers, and th

AN93210 Rev. 0.9A V29FastPOS Sample Program IntroductionThe 0.8 revision of AN93 outlined a Fax-Class 1interface to V.29 FastPOS. In this method, the

AN93Rev. 0.9 211Example program in C/C++This program shows how to establish an SDLC V29FastPOS link and keep the loop alive.How to use the program:It

AN93212 Rev. 0.9COMMTIMEOUTS sCOMMTIMEOUTS;int iCharCount;char *cpInputRd, *cpInputRd_temp, cpInput_test[255]; char caU

AN93Rev. 0.9 213patch CRC printf ("%s \n", cpInputRd); cpInputRd=cpInputRd_temp; // Display thepatch CRC // setup county o

AN93214 Rev. 0.9 exit(1); } char caOutGoing[256]; bool bValidLine = GetFileTextLine(caOutGoing); printf("Phone Number: %s\n&q

AN93Rev. 0.9 215 printf("%02x ", (unsigned char)cpInput_test[i]);printf("**%d ",*cpInputRd); //Alternatively use CTS

AN93216 Rev. 0.9 // Build on the current configuration, and skip setting the size // of the input and output buffers with SetupComm. bSuccess =

AN93Rev. 0.9 217{ unsigned long ulNoOfbytes; strcpy(cpOutBuffer, cpCommand); WriteFile(hCom, (long *)cpOutBuffer, strlen((char *)cpOutBuffer),

AN93218 Rev. 0.9 SetCommTimeouts(hCom, &sCOMMTIMEOUTS); // Read the serial port BOOL bError = !ReadFile(hCom, cpInputWr, 1, &

AN93Rev. 0.9 219 if (!bSuccess) { // Handle the error. printf ("SetCommState failed with error %d.\n", GetLastError());

AN9322 Rev. 0.9Figure 9. Si2493/57/34/15/04 Functional Block Diagram3.1. ControllerThe controller provides several vital functions includingAT comman

AN93220 Rev. 0.9 char caOutGoing[256]; cpInputRd_temp = SendAndWaitFor("AT&T7\r", cpInputRd, "OK\r\n", 300); //AT&T7r

AN93Rev. 0.9 221V29FastPOS detailed wave filesThe following is a wave files that show a V29FastPOS SDLC transaction. It was captured with the program

AN93222 Rev. 0.9V29FastPOS DTE traceThis is recorded while the program listed above is running. The patch load is left out for brevity.DCE CR LF

AN93INDEXRev. 0.9 223AA/ 27, 29Absolute Current Level 92–93, 124ac Termination 11, 17, 86, 135Analog Output 20Answer 8, 29, 45, 53, 57, 66, 81, 135, 1

AN93INDEX224 Rev. 0.9Termination 16, 87, 88, 93, 125, 135, 140Termination Control Bits 141DCD 49, 66, 91, 92, 100, 102, 133DCE 22, 98Default Settings

AN93INDEXRev. 0.9 225Mask 102, 103IntrusionBlocking 93–94, 124Detection 22, 89, 92–93, 105, 123, 124, 134–135blocking 93Detection—On-Hook Condition 12

AN93INDEX226 Rev. 0.9PLL 21, 90PowerControl 21, 106Down 56, 86Supply 11, 16, 88Powerdown 56, 58, 86Pre-dialDelay Time Register 83delay-time 72, 83Prog

AN93INDEXRev. 0.9 227Transmit FIFO Almost Full 102, 103Transmit leveladjust 72, 83Register 83Troubleshooting 157–159, 180–182TXD 56, 98, 102Typical Vo

AN93228 Rev. 0.9DOCUMENT CHANGE LISTRevision 0.5 to Revision 0.6 Added Si2493 to title. Added V.92 information. Added V.44 information. Added and

AN93Rev. 0.9 229NOTES:

AN93Rev. 0.9 233.1.2. Error CorrectionThe Si2493/57/34/15/04 ISOmodem can employ errorcorrection (reliable) protocols to ensure error-freedelivery of

AN93230 Rev. 0.9CONTACT INFORMATIONSilicon Laboratories Inc.4635 Boston LaneAustin, TX 78735Tel: 1+(512) 416-8500Fax: 1+(512) 416-9669Toll Free: 1+(87

AN9324 Rev. 0.9the Framed Submode can be used in the sameapplications currently using the Legacy SynchronousDCE Mode. Prior to sending the ATDT to est

AN93Rev. 0.9 25Table 13. EM In-band Commands and StatusesCommand / Indicator pairHex Code Transmit Direction Receive Direction Supported in Transparen

AN9326 Rev. 0.9Given the example initialization settings shown inTable 12, after an ATDT command has been sent toestablish a connection, the modem res

AN93Rev. 0.9 27the <EM> <mark> indicator if the sending modemexperienced a transmitter underrun or overrun problem. In general, the RTS fl

AN9328 Rev. 0.9The modem has a 48-character buffer, which makes itpossible to enter multiple AT commands on a singleline. The multiple commands can be

AN93Rev. 0.9 29Table 18. Basic AT Command SetCommand Action$Display Basic AT command mode settings (see text for details).AAnswer incoming call.A/Re-e

AN93Rev. 0.9 3TABLE OF CONTENTSSection Page1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AN9330 Rev. 0.9DnDialThe dial command, which may be followed by one or more dial command modifiers, dials a phone number:Modifier Function! or & F

AN93Rev. 0.9 31HnHook-switch.H0Go on-hook (hang up modem).H1Go off-hook.InIdentification and checksum.I0Display Si2493/57/34/15/04 revision code.A=Rev

AN9332 Rev. 0.9I7Diagnostic Results 1.FormatRX <rx_rate>,TX <tx_rate>PROTOCOL: <protocol>LOCAL NAK <rre>REMOTE NAK <rte>

AN93Rev. 0.9 33XnCall Progress Monitor (CPM)—This command controls which CPM signals are monitored and reported to the host from the Si2493/57/34/15/0

AN9334 Rev. 0.9:UU-Register Write—This command writes to the 16-bit U-Registers. The format is AT:Uhh,xxxx,yyyy,zzzz,..., wherehh = user-access addres

AN93Rev. 0.9 35+DS44 =A,B,C,D,E,F,G,H,IControls V.44 data compression function*.A Direction0 No compression (V.42bis P0 = 0)1 Transmit only2 Receive

AN9336 Rev. 0.9+ESA = A,B,C,D,E,F,GSynchronous access mode control optionsA – Specifies action taken if an underrun condition occurs during transparen

AN93Rev. 0.9 37+GCI = XCountry settings - Automatically configure all registers for a particular country.XCountry9 AustraliaAAustriaF Belgium16 Brazil

AN9338 Rev. 0.9+IFC Options+IFC = A+IFC = A,BSpecifies the flow control to be implemented.A Specifies the flow control method used by the host to cont

AN93Rev. 0.9 39+MS Options+MS = A+MS = A,B+MS = A,B,C+MS = A,B,C,D+MS = A,B,C,D,E+MS = A,B,C,D,E,FModulation Selection.A Preferred modem carrierV21

AN934 Rev. 0.93.1.10.3. “Escape Pin” Escape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543.1.11. Sleep Mode. . . . .

AN9340 Rev. 0.9+PMHR=X Initiate MOH. Requests the DCE to initiate or to confirm a MOH procedure. Valid only if MOH is enabled.X Mode0 V.92 MOH reques

AN93Rev. 0.9 41+VCDT = nCaller ID Type.nMode0 = After ring only (Bellcore)1 = Always on (Bellcore)2=UK3 = Japan+VCID = nCaller ID Enable.n 0

AN9342 Rev. 0.93.1.9. Extended AT CommandsThe extended AT commands, described in Tables 19–21, are supported by the Si2493/57/34/15/04.Table 19. Exten

AN93Rev. 0.9 43&H2 V.34 with automatic fallback (33.6 kbps to 300 bps) (default for Si2434).&H3 V.34 only (33.6 kbps to 2400 bps).&H4 ITU-

AN9344 Rev. 0.9Figure 10. Phone Line Termination Circuit&X0 Abort &x1 or &x2 command.&X1 Automatic determination of telephone line typ

AN93Rev. 0.9 45Table 20. Extended AT% Command SetCommand Action%$ Display AT% command settings (see text for details).%B Report blacklist. See also S4

AN9346 Rev. 0.9%V2 Automatic Line Status Detection - Adaptive Method.Description: Before going off-hook with the ATD, ATO, or ATA commands, the Si2493

AN93Rev. 0.9 47The connect messages shown in Table 21 are sent when link negotiation is complete.Table 21. Extended AT\ Command SetCommand Action\$ Di

AN9348 Rev. 0.9\P3 Mark.\Qn Modem-to-DTE flow control.\Q0 Disable all flow control—This may only be used if the DTE speed and the line (DCE) speed are

AN93Rev. 0.9 49\T15 307.200 kbps\T16 Autobaud On4\T17 Autobaud Off. Lock at current baud rate.\U Serial mode—causes a low pulse (25 ms) on RI and DCD.

AN93Rev. 0.9 53.3.38. U6F (PTME) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 903.3.39. U70 (IO0)

AN9350 Rev. 0.9Table 22. Result CodesNumeric4Meaning Verbal Response X0 X1 X2 X3 X4 X50 Command was successful OK X X X X X X1 Link established at 30

AN93Rev. 0.9 5132 UK CID State Tone Alert Signal detectedSTAS XXXXX X33 Overcurrent condition X2XXXXX X40 Blacklist is full BLACKLIST FULL (enabled vi

AN9352 Rev. 0.980 MNP2 protocol PROTOCOL: ALTERNATE, +CLASS 2Set with \V command.81 MNP3 protocol PROTOCOL: ALTERNATE, +CLASS 3Set with \V command.82

AN93Rev. 0.9 53Table 23. Disconnect CodesDisconnect Code Reason8002 Handshake stalled.8 No dial tone detected.8008 No line available.9 No loop current

AN9354 Rev. 0.93.1.10. Escape MethodsThere are four ways to escape from data mode andreturn to command mode once a connection isestablished. Three of

AN93Rev. 0.9 55Figure 12. “9th Bit” Escape TimingUART Timing for Modem Transmit Path (9N1 Mode with 9th Bit Escape)D0 D1 D2 D3 D4 D5 D6 ESCD7 StopStar

AN9356 Rev. 0.93.1.11. Sleep ModeThe Si2493/57/34/15/04 can be set to enter a low-power sleep mode when not connected and after aperiod of inactivity

AN93Rev. 0.9 57The reset recovery time (the time between a hardwarereset or the carriage return of an ATZ command and thetime the next AT command can

AN9358 Rev. 0.93.2. DSPThe DSP (data pump) is primarily responsible formodulation, demodulation, equalization, and echocancellation. Because the ISOm

AN93Rev. 0.9 59A CRC can be run on the upgrade file loaded into on-chip Program RAM with the AT&T6 command to verifythat the upgrade was correctly

AN936 Rev. 0.93.5.20.2. Special Country Requirements for India. . . . . . . . . . . . . . . . . . . . . . 1383.5.20.3. Caller ID . . . . . . . . . .

AN9360 Rev. 0.9may be allocated to the <commands> portion of theEEPROM is limited to 1000 bytes.Firmware upgrades may also be automatically load

AN93Rev. 0.9 61WEL = write enable latchWIP = write in progressTable 26. EEPROM Status Register (Any Other Bits are Unused)76543210——————WELWIPTable 27

AN9362 Rev. 0.9Figure 14. EEPROM Serial I/O Timing3.3.3. Detailed EEPROM ExamplesEEPROM Data is stored and read in hex ascii format ineight address bl

AN93Rev. 0.9 63The following are examples of Boot commands, ATcommand macros, and automatically-loaded firmwareupgrades.3.3.7. Boot Command ExampleOn

AN9364 Rev. 0.9Table 29. Combination ExampleCommand FunctionBOOT<CR><commands><CR><commands><CR>Start of EEPROM contents

AN93Rev. 0.9 65Table 30. ASCII Chartdec hex Display dec hex Display dec hex Display dec hex Display0 00 <NUL> 32 20 <space> 64 40 @ 96 60

AN9366 Rev. 0.93.3.10. S-RegistersS-Registers are typically used to set modemconfiguration parameters during initialization and arenot usually changed

AN93Rev. 0.9 6710 Carrier loss timer—The time a remote modem carrier must be lost before the Si2493/57/34/15/04 discon-nects. Setting this timer to 25

AN9368 Rev. 0.941 V.34 symbol rate - Symbol rate for V.34 when using the &T4 and &T5 commands.0 – 2400 symbols/second1 – 2743 symbols/second2

AN93Rev. 0.9 693.3.11. U-RegistersU-Registers (user-access registers) are 16-bit registersdirectly written by the AT:Uhh command and read by theAT:R (

AN93Rev. 0.9 72. Hardware Design ReferenceThe Si2493/57/34/15/04 chipset family consists of a 24-pin TSSOP or a 16-pin SOIC low-voltage modem device(

AN9370 Rev. 0.9U0F 0x000F DT4A0 Dial tone detect filter stage 4 biquad coefficients. 0x0400U10 0x0010 DT4B1 0x70D2U11 0x0011 DT4B2 0xC830U12 0x0012 DT

AN93Rev. 0.9 71U2E 0x002E BMTT Busy cadence minimum total time in seconds multiplied by 7200. 0x0870U2F 0x002F BDLT Busy cadence delta in seconds mult

AN9372 Rev. 0.9U4E 0x004E PRDD Pre-dial delay-time—(ms units). 0x0000U4F 0x004F FHT Flash hook time—(ms units). 0x01F4U50 0x0050 LCDN Loop current deb

AN93Rev. 0.9 73U86 0x0086 V9AGG V.90 rate reduction in 1333 bps units. The V.90 connect rate is reduced by this amount during negotiation.0x0000U87 0x

AN9374 Rev. 0.9Table 33. Bit-Mapped U-Register SummaryReg. Name Bit 15Bit 14Bit 13Bit 12Bit 11Bit 10Bit 9Bit 8Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0

AN93Rev. 0.9 753.3.12. U-Register Detailed DescriptionU-Registers are identified with the letter “U” followed bythe last two digits of the register’s

AN9376 Rev. 0.93.3.14. U17–U30 (Busy Tone Detect Filter Registers)U17–U2A set the biquad filter coefficients for stages 1–4 of the Busy Tone detect fi

AN93Rev. 0.9 77Table 36. BPF Biquad ValuesBPF Biquad ValuesStage 1 Stage 2 Stage 3 Stage 4 Output Scalar310/510 (Default Busy and Dial Tone)A0 0x0800

AN9378 Rev. 0.9Example: The United States specifies a busy tone with on time from 450 to 550 ms and off time from 450 to550 ms. Thus, minimum ON time

AN93Rev. 0.9 793.3.15. U31–U33 (Ringback Cadence Registers)U31, U32, and U33 set the ringback cadence minimumtotal time (RMTT), ringback cadence delta

AN938 Rev. 0.9Table 2. Modulations and Protocols*Protocol Function Si2493 Si2457 Si2434 Si2415 Si2404V.44 CompressionDV.42bis Compression DDDDDV.42 Er

AN9380 Rev. 0.93.3.18. U46–U48 (DTMF Dial Registers)U46–U48 set the DTMF power level, DTMF on time, and DTMF off time, respectively (see Table 40). Th

AN93Rev. 0.9 813.3.19. U49–U4C (Ring Detect Registers)U49, U4A, U4B, and U4C set a representation of themaximum ring frequency, the difference between

AN9382 Rev. 0.9Table 42. Register U4D Bit Map Bit Name Function15 Reserved Read returns zero.14 TOCT Turn Off Calling Tone.0 = Disable.1=Enable.13 Res

AN93Rev. 0.9 833.3.21. U4E (Pre-dial Delay Time Register)U4E sets the delay time between the ATD commandcarriage return and when the modem goes off-ho

AN9384 Rev. 0.93.3.25. U53 (Modem Control Register 2)U53 (MOD2) is a bit-mapped register with all bits,except bit 15, reserved (see Table 52). The AT&

AN93Rev. 0.9 853.3.28. U63 (DAAC2)U63(DAAC2) is a bit-mapped register with bits 3:0 reserved and should be modified through a read-modify-writeoperati

AN9386 Rev. 0.93.3.29. U65 (DAAC4)U65 (DAAC4) is a bit-mapped register with bits 3:0,12:5, and 15 reserved. Bits 1:0 and 6:5 must not bechanged in a r

AN93Rev. 0.9 87When DCR = 1b, the device presents a dc lineimpedance of 800 Ω, which can be used to enhanceoperation with a parallel phone, for impro

AN9388 Rev. 0.93.3.33. U68 (ITC2)U68 is a bit-mapped register with bits 15:3 reserved.Reading these bits returns zero. Bits 4 and 2:0 are allread/writ

AN93Rev. 0.9 893.3.35. U6C (LVS)U6C contains the line voltage status register, LVS, andresets to 0xXX00. Bits 7:0 are reserved, and a readreturns zero

AN93Rev. 0.9 92.2. Modem and DAA OperationThis section describes hardware design requirementsfor optimum Si2493/57/34/15/04 modem chipsetimplementati

AN9390 Rev. 0.93.3.37. U6E (CK1)U6E controls the clockout divider. Bits 15:13 and 7:0 arereserved. U6E resets to 0x7F20 with a power-on ormanual reset

AN93Rev. 0.9 91Bit 13 (TES) = 1b (default) enables the traditional “+++”escape sequence. To successfully escape from datamode to command mode using “+

AN9392 Rev. 0.9Reset settings = 0x00003.3.40. U76 (GEN1)U76 provides control for parallel phone detect (PPD)intrusion parameters including the off-hoo

AN93Rev. 0.9 93is adjustable in 3 mA units. The default value is 2(6 mA).Bits 4:0 (ACL): ACL provides a means of detecting aparallel phone intrusion d

AN9394 Rev. 0.93.3.43. U79 (GEN4)U79 is a bit-mapped register. Bits 15:6 are reserved. Bits 5:0 represent the line voltage, loop current, or on-hook l

AN93Rev. 0.9 953.3.44. U7A (GENA)U7A is a bit-mapped register. U7A resets to 0x0000.Bits 15:8 and 5:3 are reserved.Bit 7 (DOP) is used in a method to

AN9396 Rev. 0.93.3.46. U7D (GEND)U7D is a bit-mapped register with bits 15,13:9, and bits8:2 reserved. U7D resets to 0x0000 with a power-on ormanual r

AN93Rev. 0.9 97U87 SAM Synchronous Access Mode Configuration OptionsBit Name Function15:11 Reserved Read returns zero.10 MINT Minimal Transparency0 =

AN9398 Rev. 0.93.4. Digital InterfaceThe Si2493/57/34/15/04 can be connected to a hostprocessor through either a serial or parallel interface.Direct

AN93Rev. 0.9 99XON/XOFF is a software flow control in which themodem and the terminal control data flow by sendingXON characters (^Q/11h) and XOFF cha