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| Si2457/34/15/04 V.90, V.34, V. 32 B I S , V.22B I S I SO M O D E M (R) Features Data modem formats ITU-T, Bell 300 bps up to 56 kbps V.21,V.22, V.29 Fast Connect V.42, V.42bis, MNP2-5 Automatic rate negotiation WITH GL O B A L DAA Integrated DAA Over 6000 V Capacitive isolation Parallel phone detect Globally-compliant line interface Overcurrent detection Type I and II caller ID decode No external ROM or RAM required UART or parallel interface AT command set support SMS / MMS support 27 MHz clock input Single 3.3 V power supply Firmware upgradeable EEPROM interface Pb-free, RoHS Compliant Packages Commercial or industrial temperature range Ordering Information This data sheet is valid only for those chipset combinations listed on page 70. Applications Set-top boxes Point-of-sale terminals Text/video telephones Digital video recorder Digital televisions Remote monitoring Pin Assignments Si2457/34/15/04 (16-Pin Option) CLKIN/XTALI XTALO RI VD RXD TXD CTS RESET 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 RTS DCD ESC VA GND INT C1A C2A Description The ISOmodem(R) family of products is a complete modem ranging in speed from 56,000 bps to 2400 bps. Offered as a chipset with the Si2457, Si2434, Si2415, or Si2404 system-side device and the Si3018/10 line-side device, the ISOmodem utilizes Silicon Laboratories' patented direct access arrangement (DAA) technology to provide a programmable telephone line interface with an unparalleled level of integration. These compact solutions eliminate the need for a separate DSP, modem controller, codec, transformer, relay, opto-isolators, clocking crystal, and 2-4 wire hybrid. Available with a system-side packaging option of either a 16-pin SOIC or a 24-pin TSSOP, these devices are ideal for embedded modem applications due to their flexibility, small footprint, and minimal external component count. Si2457/34/15/04 (24-Pin Option) CLKIN/XTALI XTALO CLKOUT/EECS/A0 FSYNC/D6 VD3.3 GND VDA RTS/D7 RXD/RD TXD/WR CTS/CS 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SDO/EECLK/D5 DCD/D4 ESC/D3 VD3.3 GND VDB SDI/EESD/D2 RI/D1 INT/DO AOUT/INT C1A C2A Functional Block Diagram CLKIN/XTALI CLKOUT RXD TXD CTS RTS DCD ESC RI INT CS WR RD A0 D0-D7 RESET PLL Clocking XTALO RESET RAM/ROM Data Bus Si3018/10 QE DCT Si3018/10 1 2 3 4 5 6 7 8 Serial Interface DAA Interface To Phone Line 16 15 14 13 12 11 10 9 DCT2 IGND DCT3 QB QE2 SC VREG2 RNG2 RX IB C1B C2B VREG RNG1 Microcontroller DSP AOUT Parallel Interface ISOB Rev. 1.1 8/06 Copyright (c) 2006 by Silicon Laboratories Si2457/34/15/04 Si2457/34/15/04 2 Rev. 1.1 Si2457/34/15/04 TABLE O F CONTENTS Section Page 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3. Bill of Materials: Si2457/34/15/04 Chipset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1. Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.2. Parallel Interface (24-Pin Version Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.3. Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 4.4. Data Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.5. Fast Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 4.6. V.80 Synchronous Access Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7. Clocking/Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.8. Data Compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.9. Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 4.10. Wire Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 4.11. Caller ID Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 4.12. Parallel Phone Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.13. Overcurrent Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.14. Global Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.15. Firmware Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 4.16. SMS / MMS Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.17. Codec Interface (24-Pin Version Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.18. EEPROM Interface (24-Pin Version Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 4.19. AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 4.20. Extended AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5. S-Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 6. User-Access Registers (U-Registers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 6.1. Bit-Mapped U-Register Detail (defaults in bold) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 7. Parallel Interface Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64 8. Pin Descriptions: Si2457/34/15/04 (16-Pin Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 9. Pin Descriptions: Si2457/34/15/04 (24-Pin Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 10. Pin Descriptions: Si3018/10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 11. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 12. Package Outline: 24-Pin TSSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 13. Package Outline: 16-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74 Rev. 1.1 3 Si2457/34/15/04 1. Electrical Specifications Table 1. Recommended Operating Conditions Parameter1 Ambient Temperature Si2457/34/15/04 Supply Voltage, Digital3 Symbol TA VD Test Condition F-grade G-grade Min2 0 -40 3.0 Typ 25 25 3.3 Max2 70 85 3.6 Unit C V Notes: 1. The Si2457/34/15/04 specifications are guaranteed when the typical application circuit (including component tolerance) and any Si2457/34/15/04 and any Si3018 are used. See "2. Typical Application Schematic" on page 10. 2. All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions. Typical values apply at nominal supply voltages and an operating temperature of 25 C unless otherwise stated. 3. The digital supply, VD, operates from 3.0 to 3.6 V. The Si2457/34/15/04 interface supports 5 V logic (CLKIN/XTALI supports 3.3 V logic only). Table 2. Loop Characteristics (VD = 3.0 to 3.6 V, TA = 0 to 70 C for F-grade, TA = -40 to +85 C for G-grade) Parameter DC Termination Voltage DC Termination Voltage DC Termination Voltage DC Termination Voltage DC Termination Voltage DC Termination Voltage DC Termination Voltage On-Hook Leakage Current Operating Loop Current Operating Loop Current DC Ring Current Ring Detect Voltage2 Ring Detect Voltage2 Ring Frequency Ringer Equivalence Number Symbol VTR VTR VTR VTR VTR VTR VTR ILK ILP ILP Test Condition IL = 20 mA, =0 DCV = 00, MINI = 11, DCR = 0 IL = 120 mA, ILIM = 0 DCV = 00, MINI = 11, DCR = 0 IL = 20 mA, ILIM = 0 DCV = 11, MINI = 00, DCR = 0 IL = 120 mA, ILIM = 0 DCV = 11, MINI = 00, DCR = 0 IL = 20 mA, ILIM = 1 DCV = 11, MINI = 00, DCR = 0 IL = 60 mA, ILIM = 1 DCV = 11, MINI = 00, DCR = 0 IL = 50 mA, ILIM = 1 DCV = 11, MINI = 00, DCR = 0 VTR = -48 V MINI = 00, ILIM = 0 MINI = 00, ILIM = 1 DC current flowing through ring detection circuitry RT = 0 RT = 1 ILIM1 Min -- 9 -- 9 -- 40 -- -- 10 10 -- 12 18 15 -- Typ -- -- -- -- -- -- -- -- -- -- 1.5 15 21 -- -- Max 6.0 -- 7.5 -- 7.5 -- 40 5 120 60 3 18 25 68 0.2 Unit V V V V V V V A mA mA A VRMS VRMS Hz VRD VRD FR REN Notes: 1. ILIM = U67, bit 9; DCV = U67, bits 3:2; MINI = U67, bits 13:12; DCR = U67, bit 7; RT = U67, bit 0. 2. The ring signal is guaranteed to not be detected below the minimum. The ring signal is guaranteed to be detected above the maximum. 4 Rev. 1.1 Si2457/34/15/04 TIP + 600 Si3018 VTR 10 F - IL RING Figure 1. Test Circuit for Loop Characteristics Table 3. DC Characteristics, VD = 3.0 to 3.6 V (VD = 3.0 to 3.6 V, TA = 0 to 70 C for F-grade, TA = -40 to +85 C for G-grade) Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current Pullup Resistance Pins 3, 4, 9, 11, 15, 16, 17, 18, 23, 24 (24-pin option) Pullup Resistance Pins 3, 5, 7, 9,11, 15, 16 (16-pin option) Total Supply Current* Total Supply Current, Powerdown * Symbol VIH VIL VOH VOL IL RPU RPU ID ID Test Condition Min 2.0 -- Typ -- -- -- -- -- 125 125 26 80 Max -- 0.8 -- 0.35 10 200 200 35 -- Unit V V V V A k k mA A IO = -2 mA IO = 2 mA 2.4 -- -10 50 50 VD3.3 pin PDN = 1 -- -- *Note: All inputs at 0 or VD. All inputs held static except clock and all outputs unloaded (Static IOUT = 0 mA). Rev. 1.1 5 Si2457/34/15/04 Table 4. AC Characteristics (VD = 3.0 to 3.6 V, TA = 0 to 70 C for F-grade, TA = -40 to +85 C for G-grade, Fs = 8 kHz) Parameter Sample Rate Clock Input Frequency Clock Input Frequency Receive Frequency Response Receive Frequency Response Transmit Full Scale Level1 Receive Full Scale Dynamic Range3 Dynamic Range3 Dynamic Range3 Transmit Total Harmonic Distortion4 Transmit Total Harmonic Distortion4 Receive Total Harmonic Distortion4 Receive Total Harmonic Distortion4 Dynamic Range (Caller ID Mode) Level1,2 Symbol Fs FXTL FXTL Test Condition Min -- Typ 8 4.9152 27 5 200 1.1 1.1 80 80 80 -72 -78 -78 -78 50 Max -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Unit kHz MHz MHz Hz Hz VPEAK VPEAK dB dB dB dB dB dB dB dB default >10 k resistor between DCD and GND Low -3 dBFS Corner, FILT = 0 Low -3 dBFS Corner, FILT = 1 -- -- -- -- -- -- VFS VFS DR DR DR THD THD THD THD DRCID ILIM = 0, DCV = 11, MINI = 00 DCR = 0, IL = 100 mA ILIM = 0, DCV = 00, MINI = 11 DCR = 0, IL = 20 mA ILIM = 1, DCV = 11, MINI = 00 DCR = 0, IL = 50 mA ILIM = 0, DCV = 11, MINI = 00 DCR = 0, IL = 100 mA ILIM = 0, DCV = 00, MINI = 11 DCR = 0, IL = 20 mA ILIM = 0, DCV = 00, MINI = 11 DCR = 0, IL = 20 mA ILIM = 1,DCV = 11, MINI=00 DCR = 0, IL = 50 mA VIN = 1 kHz, -13 dBm -- -- -- -- -- -- -- -- Notes: 1. Measured at TIP and RING with 600 termination at 1 kHz, as shown in Figure 1 on page 5. 2. Receive full scale level produces -0.9 dBFS at DTX. 3. DR = 20 x log |Vin| + 20 x log (rms signal/rms noise). Applies to both transmit and receive paths. Vin = 1 kHz, -3 dBFS. 4. Vin = 1 kHz, -3 dBFS. THD = 20 x log (rms distortion/rms signal). 6 Rev. 1.1 Si2457/34/15/04 Table 5. Absolute Maximum Ratings Parameter DC Supply Voltage Input Current, Si2457/34/15/04 Digital Input Pins Digital Input Voltage CLKIN/XTALI Input Voltage Operating Temperature Range Storage Temperature Range Symbol VD IIN VIND VXIND TA TSTG Value 4.1 10 -0.3 to 5.3 -0.3 to (VD + 0.3) -10 to 100 -40 to 150 Unit V mA V V C C Note: Permanent device damage may occur if the above absolute maximum ratings are exceeded. Functional operation should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 6. Switching Characteristics (VD = 3.0 to 3.6 V, TA = 0 to 70 C for F-grade, TA = -40 to +85 C for G-grade) Parameter CLKOUT Output Clock Frequency Symbol Min 2.048 Typ -- Max 49.152 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 20 -- 30 -- Unit MHz Baud Rate Accuracy Start Bit to RTS CTS or RTS High to Start Bit Stop Bit to CTS RESET to RESET RESET to 1st AT Command Address Setup Address Hold WR Low Pulse Width Write Data Setup Time Write Cycle Time Chip Select Setup Chip Select Hold RD Low Pulse Width RD Low to Data Driven Time Data Hold RD High to Hi-Z Time Read Cycle Time tBD tRTH tRTS tCTH tRS tAT tAS tAH tWL tWDSU tWC tCSS tCSH tRL tRLDD tDH tDZ tRC -1 -- 10 -- 5.0 300 15 0 50 20 120 10 0 50 -- 10 -- 120 -- 1/(2 x Baud Rate) -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- % ns ns ns ms ms ns ns ns ns ns ns ns ns ns ns ns ns Note: All timing is referenced to the 50% level of the waveform. Input test levels are VIH = VD - 0.4 V, VIL = 0.4 V Rev. 1.1 7 Si2457/34/15/04 UART Time for Modem Receive Path (8N1 Mode) 8-B it Data M ode RX S tart D0 D1 D2 D3 D4 D5 D6 D7 S top tR TS t R TH RTS UART Timing for Modem Transmit Path (9N1 Mode with 9th Bit Escape) 9-B it Data M ode TX S tart D0 D1 D2 D3 D4 D5 D6 D7 ESC S top t R TS t CTH CTS Figure 2. Asynchronous UART Serial Interface Timing Diagram 8 Rev. 1.1 Si2457/34/15/04 t CSS t CSH CS t AS t AH A0 ADDRESS = 0 or 1 t RL t RC RD t DZ t RLDD t DH D[7:0] VALID DATA t RLDD VALID DATA Figure 3. Parallel Interface Read Timing t CSS t CSH CS t AS t AH A0 ADDRESS = 0 or 1 tW L tW C WR t W DSU t DH D[7:0] VALID DATA VALID DATA Figure 4. Parallel Interface Write Timing Rev. 1.1 9 4 VD CLKIN/XTALI C41 R1 + R10 FB2 R11 R12 C1 D1 Q1 + Q5 1 RX 1 Si2457/34/15/04 RTS_ DCD_ ESC INT_ GPIO 16 15 14 11 3 2 DCT 2 DCT3 5 C1B R5 Q2 C3 R2 R4 R3 Q3 Q4 Z1 C10 R6 GND VA 12 13 IGND 15 11 SC 10 C50 VDD Refer to AN93 Appendix A for layout guidelines. Please submit layout to Silicon Labs for review prior to PCB fabrication. C7 External crystal option Y1 C40 U2 C4 Emissions option R16 RING U1 3 RTS DCD ESC INT GPIO 2 14 10 XTALO RV1 RXD TXD CTS_ R13 C2 5 6 7 9 C2B DCT2 QB QE2 QE 4 IB VREG RNG2 VREG2 R7 R9 C5 C6 R8 RXD TXD CTS 6 16 13 12 1 C1A RESET_ 8 TIP FB1 R15 RESET C2A 2. Typical Application Schematic C51 7 9 10 8 Rev. 1.1 RNG1 C9 C8 Figure 5. Typical Schematic with 16-pin System-Side Option VDD C50 C52 No Ground Plane In DAA Section Refer to AN93 Appendix A for layout guidelines. Please submit layout to Silicon Labs for review prior to PCB fabrication. 5 21 U1 C7 C4 VD3.3 VD 3.3 External crystal option C40 U2 CLKIN/XTALI C41 R1 + R10 DC Term R11 R12 C1 D1 Q1 + Q5 Hookswitch 1 RX 1 Y1 Emissions option R16 RING FB2 EECLK/D5 DCD_/D4 ESC/D3 AOUT/INT_ D6 24 23 22 15 4 3 XTALO 2 DCT3 5 C1B R5 Q2 C3 R2 R4 R3 Q3 Q4 Z1 C10 R6 EECLK/D5 DCD/D4 ESC/D3 AOUT/INT D6 2 DCT 14 2 INT_/D0 RI_/D1 EESD/D2 16 17 18 C1A 14 INT/D0 RI/D1 EESD/D2 RV1 CLKOUT/EECS_/A0 3 CLKOUT/EECS/A0 R13 C2 TIP FB1 R15 RTS_/D7 RXD/RD_ TXD/WR_ CTS_/CS_ 8 9 10 11 C2A DCT2 QB QE2 C51 C53 RTS/D7 RXD/RD TXD/WR CTS/CS 13 C2B 16 13 12 1 6 6 20 7 19 GND GND VDA VDB RESET_ 12 RESET QE Bias 4 IB VREG RNG2 VREG2 Ring Detect/CID R7 R8 Bypass 7 9 10 8 IGND 15 11 SC Rev. 1.1 R9 C5 C6 RNG1 C9 C8 Si2457/34/15/04 Figure 6. Typical Schematic with 24-pin System-Side Option 11 Si2457/34/15/04 3. Bill of Materials: Si2457/34/15/04 Chipset Component C1, C2 C3 C4 C5, C6, C50, C52 C7 C8, C9 C10 C40, C41 D1, D2 3 2 1 Value 33 pF, Y2, X7R, 20% 10 nF, 250 V, X7R, 20% 1.0 F, 50 V, Elec/Tant, 20% 0.1 F, 16 V, X7R, 20% 2.7 nF, 50 V, X7R, 20% 680 pF, Y2, X7R, 10% 0.01 F, 16 V, X7R, 20% 33 pF, 16 V, NPO, 5% 0.22 F, 16 V, X7R, 20% Dual Diode, 225 mA, 300 V, CMPD2004S Ferrite Bead, BLM21AG601SN1 NPN, 300 V, MMBTA42 PNP, 300 V, MMBTA92 NPN, 80 V, 330 mW, MMBTA06 Sidactor, 275 V, 100 A 1.07 k, 1/2 W, 1% 150 , 1/16 W, 5% 3.65 k, 1/2 W, 1% 2.49 k, 1/2 W, 1% 100 k, 1/16 W, 5% 20 M, 1/16 W, 5% 1 M, 1/16 W, 1% 536 , 1/4 W, 1% 73.2 , 1/2 W, 1% 56 , 1/16 W, 1% 0 , 1/16 W Si2457/34/15/04 Si3018/10 4.9152 MHz, 20 pF, 100 ppm, 150 ESR Zener Diode, 43 V, 1/2 W, BZT84C43 Supplier(s) Panasonic, Murata, Vishay Venkel, SMEC Panasonic Venkel, SMEC Venkel, SMEC Panasonic, Murata, Vishay Venkel, SMEC Venkel, SMEC Venkel, SMEC Central Semiconductor Murata OnSemi, Fairchild OnSemi, Fairchild OnSemi, Fairchild Teccor, Protek, ST Micro Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Venkel, SMEC, Panasonic Silicon Labs Silicon Labs ECS Inc., Siward On Semi C51, C531 FB1, FB2 Q1, Q3 Q2 Q4, Q5 RV1 R1 R2 R3 R4 R5, R6 R7, R8 R9 R10 R11 R12, R13 R15, R164 U1 U2 Y12,5 Z1 Notes: 1. C52 and C53 should not be populated with the Si2457/34/15/04 16-pin package option. 2. In STB applications, C40, C41, and Y1 can be removed by using the 27 MHz clock input feature. 3. Several diode bridge configurations are acceptable. For example, a single DF04S or four 1N4004 diodes may be used. 4. Murata BLM21AG601SN1 may be substituted for R15-R16 (0 ) to decrease emissions. 5. To ensure compliance with ITU specifications, frequency tolerance must be less than 100 ppm including initial accuracy, 5-year aging, 0 to 70 C, and capacitive loading. 50 ppm initial accuracy crystals typically satisfy this requirement. 12 Rev. 1.1 Si2457/34/15/04 Table 7. Protocol Characteristics Item Data Rate 56 kbps1 54.666 kbps1 53.333 kbps1 52 kbps1 50.666 kbps1 49.333 kbps1 48 kbps1 46.666 kbps1 45.333 kbps1 44 kbps1 42.666 kbps1 41.333 kbps1 40 kbps1 38.666 kbps1 37.333 kbps1 36 kbps1 34.666 kbps1 33.333 kbps1 32 kbps1 30.666 kbps1 29.333 kbps1 28 kbps1 33.6 kbps2 31.2 kbps2 28.8 kbps2 26.4 kbps2 24.0 kbps2 21.6 kbps2 19.2 kbps2 16.8 kbps2 14.4 kbps3 12.0 kbps3 9600 bps3 7200 bps3 4800 bps3 2400 bps 1200 bps 300 bps 300 bps Data Format Bit asynchronous Specification ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.901 ITU-T V.342 ITU-T V.342 ITU-T V.342 ITU-T V.342 ITU-T V.342 ITU-T V.342 ITU-T V.342 ITU-T V.342 ITU-T V.34 or V.32bis3 ITU-T V.34 or V.32bis3 ITU-T V.34, V.32bis, or V.293 ITU-T V.34 or V.32bis3 ITU-T V.34 or V.32bis3 ITU-T V.34 or V.22bis3 ITU-T V.22bis, V.23, or Bell 212A ITU-T V.21 Bell 103 Selectable 8, 9, 10, or 11 bits per character Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. Rev. 1.1 13 Si2457/34/15/04 Table 7. Protocol Characteristics (Continued) Item Compatibility Operating Mode Switched network Data Modulation 28 to 56 kbps1 2.4 to 33.6 kbps2 14.4 kbps3 12.0 kbps3 9600 bps3 9600 bps3 9600 bps3 7200 bps3 4800 bps3 2400 bps 1200 bps 0 to 300 bps Answer Tone ITU-T V.32bis, V.32, V.22bis, V.22, and V.21 modes Bell 212A and 103 modes Transmit Carrier V.901 V.342 ITU-T V.32bis3 ITU-T V.323 ITU-T V.293 ITU-T V.22, V.22bis/Bell 212A Originate mode Answer mode ITU-T V.21 Originate mode Answer mode Bell 103 Originate mode Answer mode Output Level Permissive--Switched network Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. 1 Specification ITU-T V.90 , V.342, V.32bis, V.32, V.23, V.22bis, V.22, V.21, Bell 212A, and Bell 103 Two-wire full duplex V.90 as specified by ITU-T V.34 as specified by ITU-T 128-level TCM/2400 Baud 0.01% 64-level TCM/2400 Baud 0.01% 32-level TCM/2400 Baud 0.01% 16-level QAM/2400 Baud 0.01% V.29 QAM as specified by ITU-T 16-level TCM/2400 Baud 0.01% 4-level QAM/2400 Baud 0.01% 16-level QAM/600 Baud 0.01% 4-level PSK/600 Baud 0.01% FSK 0-300 Baud 0.01% 2100 Hz 3 Hz 2225 Hz 3 Hz As specified by ITU-T As specified by ITU-T 1800 Hz 0.01% 1800 Hz 0.01% 1700 Hz1 Hz 1200 Hz 0.5 Hz 2400 Hz 1 Hz Mark (980 Hz 12 Hz) Space (1180 Hz 12 Hz) Mark (1650 Hz 12 Hz) Space (1850 Hz 12 Hz) Mark (1270 Hz 12 Hz) Space (1070 Hz 12 Hz) Mark (2225 Hz 12 Hz) Space (2025 Hz 12 Hz) -9 dBm maximum 14 Rev. 1.1 Si2457/34/15/04 Table 7. Protocol Characteristics (Continued) Item Receive Carrier ITU-T V.901 ITU-T V.342 ITU-T V.32bis3 ITU-T V.323 ITU-T V.293 ITU-T V.22, V.22bis/Bell 212A Originate mode Answer mode ITU-T V.21 Originate mode Answer mode Bell 103 Originate mode Answer mode Carrier Detect (level for ITU-T V.22bis, V.22, V.21, 212, 103) in Switched Network Hysteresis Specification As specified by ITU-T As specified by ITU-T 1800 Hz 7 Hz 1800 Hz 7 Hz 1700 Hz 7 Hz 2400 Hz 7 Hz 1200 Hz 7 Hz Mark (980 Hz 12 Hz) Space (1180 Hz 12 Hz) Mark (1650 Hz 12 Hz) Space (1850 Hz 12 Hz) Mark (2225 Hz 12 Hz) Space (2025 Hz 12 Hz) Mark (1270 Hz 12 Hz) Space (1070 Hz 12 Hz) Acquisition (-43 dBm) Release (-48 dBm) 2 dBm minimum Note: ITU-T V.901, V.342, V.32/V.32bis3 are echo canceling protocols that use signal quality as criteria for maintaining connection. They also provide for self-training detection to force disconnect. DTE Interface Line Equalization Connection Options Phone Types Dialing DTMF Output Level Pulse Dial Ratio Ring Cadence Call Progress Monitor EIA/TIA-232-E (ITU-T V.24/V.28/ISO 2110) Automatic Adaptive Loss of Carrier in ITU-T V.22bis and lower 500 (rotary dial), 2500 (DTMF dial) Pulse and Tone Per Part 68 Make/Break: 39/61% On 2 seconds; Off 4 seconds BUSY CONNECT (rate) NO ANSWER NO CARRIER NO DIALTONE OK RING RINGING Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. Rev. 1.1 15 Si2457/34/15/04 4. Functional Description The Si2457/34/15/04 ISOmodem(R) is a complete embedded modem chipset with integrated direct access arrangement (DAA) that provides a programmable line interface to meet global telephone line requirements. Available in two small packages, this solution includes a DSP data pump, modem controller, on-chip RAM and ROM, codec, DAA, analog output, and 27 MHz clock input. The Si2457/34/15/04 accepts standard modem AT commands and provides connect rates up to 56/33.6/ 14.4/2.4 kbps full-duplex over the Public Switched Telephone Network (PSTN). The Si2457/34/15/04 features a complete set of modem protocols including all ITU-T standard formats up to 56 kbps. To provide the most flexibility, the Si2457/34/15/04 ISOmodem system-side device is offered in either a 24pin TSSOP or a 16-pin SOIC package. The 16-pin version is footprint-compatible with the Si2401 ISOmodem and is recommended for most applications. The 16-pin version does not support the parallel, EEPROM or voice codec interface. If these features are required, customers should use the 24-pin version. The ISOmodem provides numerous additional features for embedded modem applications. The modem includes full type I and type II caller ID detection and decoding for global standards. Call progress monitoring is supported through standard result codes. The modem is also programmable to meet global settings. Because the Si2457/34/15/04 ISOmodem integrates the DAA, analog features, such as parallel phone detect, overcurrent detection, and global PTT compliance with a single design, are included. This device is ideal for embedded modem applications due to its small board space, low power consumption, and global compliance. The Si2457/34/15/04 solution includes a silicon DAA using Silicon Laboratories' proprietary third-generation DAA technology. This highlyintegrated DAA can be programmed to meet worldwide PTT specifications for ac termination, dc termination, ringer impedance, and ringer threshold. In addition, the Si2457/34/15/04 has been designed to meet the most stringent worldwide requirements for out-of-band energy, billing-tone immunity, surge immunity, and safety requirements. The Si2457/34/15/04 allows for rapid integration into existing modem applications by providing a serial interface that can directly communicate to either a microcontroller via a UART interface or a PC via an RS232 port. This interface allows for PC evaluation of the modem immediately upon powerup via the AT commands using standard terminal software. 4.1. Serial Interface The Si2457/34/15/04 supports asynchronous serial communication with data terminal equipment (DTE) at rates up to 307.2 kbps with the standard serial UART format. Upon powerup, the UART baud rate is automatically detected using the autobaud feature. The serial interface also provides a hardware pin, DCD (data carrier detect), which remains low as long as the ISOmodem is connected. The INT interrupt pin can be programmed to alert the host of changes to the interrupts listed in I/O Control 0 (U70). To ensure backward compatibility when using a 24-pin system side option, if a pulldown resistor 10 k is placed between D2 (Si2457/34/15/04, pin 18) and GND (Si2457/34/15/04, pin 6), the DTE rate is set to a 19.2 kbps baud rate (see Table 8). 4.1.1. Autobaud The Si2457/34/15/04 includes an automatic baud rate detection feature that allows the host to start transmitting data at any standard DTE rate from 300 bps to 307.2 kbps. This feature is enabled by default. 4.2. Parallel Interface (24-Pin Version Only) The Si2457/34/15/04 digital I/O can communicate via a parallel interface. The parallel interface is an 8-bit data bus with a single bit address. Figure 3 on page 9 shows the required timing for the parallel interface. If A0 = 0, the data bus represents a read/write to the " Parallel Interface 0 (0x00)" register on page page 64. If A0 = 1, the data bus represents a read/write to the " Parallel Interface 1 (0x01)" register on page page 65). Selection of a serial or parallel I/O interface is determined by the state of AOUT/INT (Si2457/34/15/04, pin 15) during the rising edge of RESET. An internal pullup resistor forces the default state to serial mode operation. An external 10 k pulldown resistor can be connected to AOUT/INT to force selection of parallel mode (see Table 8). Configuration of pins 3, 4, 8-11, 15-18, and 22-24 is determined by this interface selection. 16 Rev. 1.1 Si2457/34/15/04 Table 8. Pulldown Selector (24-Pin SSD) Mode 4.9152 MHz CLK 27 MHz CLK Autobaud 19.2 kbps DTE No EEPROM EEPROM Serial I/O Default Pin 23 Default Pin 18 Default Pin 4 N/A Parallel I/O Pin 15 Pin 11, 15 N/A access mode of operation, which operates with an asynchronous DTE and a synchronous DCE. See "AN93: Modem Designer's Guide" for complete details. 4.7. Clocking/Low Power Modes The Si2457/34/15/04 contains an on-chip phase-locked loop (PLL) and clock generator. Using either a single crystal or master clock input, the Si2457/34/15/04 can generate all the internal clocks required to support the featured modem protocols. Either a 27 MHz or 4.9152 MHz clock (3.3 V max input--see Table 5 on page 7) on XTALI or a 4.9152 MHz crystal across XTALI and XTALO form the master clock (100 ppm max) for the ISOmodem. This clock source is sent to an internal PLL that generates all necessary internal system clocks including the DSP clock. By default, the Si2457/34/15/ 04 assumes a 4.9152 MHz clock input. If a 27 MHz clock on XTALI is used with the serial (UART) interface, a pulldown resistor < 10 k must be placed between DCD and GND. If a 27 MHz clock on XTALI is used with the parallel interface, a pulldown resistor < 10 k must be placed between CTS/CS (pin 11) and GND and AOUT/INT and GND (see Tables 8 and 9). Using the S24 S-register, the Si2457/34/15/04 can be set to automatically enter sleep mode after a preprogrammed time of inactivity with either the DTE or the remote modem. The sleep mode is entered after (S24) seconds have passed since the TX FIFO has been empty. The ISOmodem remains in the sleep state until either a 1 to 0 transition on TXD (serial mode) or a 1 to 0 transition on CS (parallel mode) occurs. Additionally, the Si2457/34/15/04 may be placed in a complete powerdown mode or wake-on-ring mode. Complete powerdown is accomplished via U65[13] (PDN). Once the PDN bit is written, the Si2457/ 34/15/04 completely powers down and can only be powered back on via the RESET pin. Table 9. Pulldown Selector (16-Pin Version) Mode 4.9152 MHz CLK 27 MHz CLK Serial I/O Default Pin 15 4.3. Command Mode Upon reset, the ISOmodem(R) is in command mode and accepts "AT" commands. An outgoing modem call can be made using the "ATDT#" (tone dial) or "ATDP#" (pulse dial) command after the device is configured. If the handshake is successful, the modem responds with the response codes detailed in Table 14 on page 36 and enters data mode. 4.4. Data Mode The Si2457/34/15/04 ISOmodem is in data mode while it has a telephone line connection to another modem or is in the process of establishing a connection. Data protocols are available to provide error correction to improve reliability (V.42 and MNP2-4) and data compression to increase throughput (V.42bis and MNP5). Each connection between two modems in data mode begins with a handshaking sequence. During this sequence, the modems determine the line speed, data protocol, and related parameters for the data link. Configuration through AT commands determines the range of choices available to the modem during the negotiation process. 4.8. Data Compression The modem can achieve DTE (host-to-ISOmodem) speeds greater than the maximum DCE (modem-tomodem) speed through the use of a data compression protocol. The compression protocols available are the ITU-T V.42bis and MNP5 protocols. Data compression attempts to increase throughput by compressing the data before actually sending it. Thus, the modem is able to transmit more data in a given period of time. 4.5. Fast Connect The Si2457/34/15/04 supports a fast connect mode of operation to reduce the time of a connect sequence in originate mode. The Fast Connect modes can be enabled for V.21, V.22, Bell103, and V.29 modulations. See "AN93: Modem Designer's Guide" for details. 4.9. Error Correction The Si2457/34/15/04 ISOmodem can employ error correction (reliable) protocols to ensure error-free delivery of asynchronous data sent between the host and the remote end. The Si2457/34/15/04 supports V.42 4.6. V.80 Synchronous Access Mode The Si2457/34/15/04 supports a V.80 synchronous Rev. 1.1 17 Si2457/34/15/04 and MNP2-4 error correction protocols. V.42 (LAPM) is most commonly used and is enabled by default. When the ISOmodem is sharing the telephone line with other devices, it is important that it not interrupt a call in progress. To detect whether another device is using the shared telephone line, the host can use the ISOmodem to monitor the TIP-RING dc voltage with the line voltage sense (LVS) register (U6C, bits 15:8). The LVS bits have a resolution of 1 V per bit with an accuracy of approximately 10%. Bits 0 through 6 of this 8-bit signed twos complement number indicate the value of the line voltage, and the sign bit (bit 7) indicates the polarity of TIP and RING. The ISOmodem can also monitor the TIP-RING dc voltage using the LVCS register (U79, bits 4:0). See Figure 7 on page 18. See also the %Vn commands for automatic line-in-use detection. 4.12.2. Off-Hook Intrusion Detection When the ISOmodem is off-hook, an algorithm is implemented in the ISOmodem to automatically monitor the TIP-RING loop current via the LVCS register. During the off-hook state, the LVCS register switches from representing the TIP-RING voltage to representing the TIP-RING current. See Figure 8 on page 19. Upon detecting an intrusion, the ISOmodem alerts the host of the condition via the INT pin. 4.10. Wire Mode Wire mode is used to communicate with standard nonerror correcting modems. When optioned with \N3, the Si2457/34/15/04 falls back to wire mode if it fails in an attempt to negotiate a V.42 link with the remote modem. Error correction and data compression are not active in wire mode. 4.11. Caller ID Operation The Si2457/34/15/04 supports full type I and type II caller ID detection and decode. Caller ID is supported for the US Bellcore, European ETSI, UK, and Japanese protocols and is enabled via the +VCID, +VCDT, and +PCW commands. 4.12. Parallel Phone Detection The ISOmodem(R) is able to detect when another telephone, modem, or other device is using the phone line. This allows the host to avoid interrupting another phone call when the phone line is already in use and to intelligently handle an interruption when the ISOmodem is using the phone line. 4.12.1. On-Hook Line-in-use Detection 30 25 20 LVC S BITS 15 10 5 0 036 9 12 15 18 21 24 28 30 33 36 39 42 45 47 51 54 57 60 63 66 69 72 75 78 81 84 87 Loop Voltage (V) 100 Figure 7. Loop Voltage 18 Rev. 1.1 Si2457/34/15/04 Overload 30 25 20 LVCS BITS 15 CTR21 only 10 5 0 0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 Loop Current (mA) 140 Figure 8. Loop Current 4.13. Overcurrent Detection The Si2457/34/15/04 includes an overcurrent detection feature that measures the loop current at a programmable time after the Si2457/34/15/04 goes offhook. This allows the Si2457/34/15/04 to detect if it is connected to an improper telephone line. The overcurrent detection feature may be enabled by setting the OCDM bit (U70, bit 11). OHT (U77, bits 8:0) sets the delay after off-hook until the loop current is measured. See "AN93: Modem Designer's Guide" for details. 4.15. Firmware Upgrades The Si2457/34/15/04 contains an on-chip program ROM that includes the firmware required for the features listed in this data sheet. In addition, the Si2457/34/15/04 contains on-chip program RAM to accommodate minor changes to the ROM firmware. This allows Silicon Labs to provide future firmware updates to optimize the characteristics of new modem designs and those already deployed in the field. See "AN93: Modem Designer's Guide" for complete details. 4.14. Global Operation The Si2457/34/15/04 chipset contains an integrated silicon direct access arrangement (Silicon DAA) that provides a programmable line interface to meet international telephone line interface requirements. "AN93: Modem Designer's Guide" gives the DAA register settings required to meet international PTT standards. Additionally, the user-access registers (via the AT:U and AT:R commands) may be programmed for countryspecific settings, such as dial tone, ring, ringback, and busy tone. See "AN93: Modem Designer's Guide" for complete details. 4.16. SMS / MMS Support The Si2457/34/15/04 supports V.23 half-duplex modulation. This modulation provides the low-level functionality needed for SMS and MMS protocols. See "AN93: Modem Designer's Guide" for complete details. 4.17. Codec Interface (24-Pin Version Only) In order to support a full range of voice and data applications, the Si2457/34/15/04 includes an optional serial interface that connects to an external voice codec (Si3000). See "AN93: Modem Designer's Guide" for complete details. Rev. 1.1 19 Si2457/34/15/04 4.18. EEPROM Interface (24-Pin Version Only) The Si2457/34/15/04 supports an optional serial peripheral interface (SPI) bus serial EEPROM Mode 3 with a 16-bit (8-64 kbit range) address. Upon powerup, if a pulldown resistor 10 k is placed between D6 (Si2457, pin 4) and GND (see Table 8), the ISOmodem attempts to detect an EEPROM. The EEPROM is intended first for setting custom defaults, second for automatically loading firmware upgrades, and third to allow for user-defined AT command macros for use in custom AT commands or country codes. See "AN93: Modem Designer's Guide" for complete details. 4.19. AT Commands At powerup, the Si2457/34/15/04 is in the AT command mode. In command mode, the modem monitors the input (serial or parallel) checking constantly for a valid command (AT commands are described in Table 10.) 20 Rev. 1.1 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) Command $ A A/ Dn Display AT command mode settings. Answer incoming call Re-execute last command. This is the only command not preceded by "AT" or followed by a Note: It is not possible to establish a modem connection when using this command. Action L P T W Redial last number. Pulse (rotary) dialing--pulse digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Tone (DTMF) dialing--DTMF digits: *, #, A, B, C, D, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Wait for dial tone before continuing for S14 seconds (default: 12 seconds). Blind dialing modes X0, X1 and X3 do not affect the W command. If the DOP bit (U7A, bit 7) is set, the "ATDTW" command will cause the ISOmodem(R) to pause dialing and either report an "OK" if a dialtone is detected or "NO DIALTONE" if a dial tone is not detected. En E0 E1 Hn H0 Local DTE echo Disable Enable Hook switch. Go on-hook (hang up modem). Rev. 1.1 21 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command H1 In I0 Go off-hook. Identification and checksum. Display Si2457/34/15/04 revision code. B: Revision B C: Revision C, etc. Display Si2457/34/15/04 firmware revision code (numeric). Display line-side revision code. 18C = Si3018 revision C Display the ISOmodem(R) model number. "2404" = Si2404 "2415" = Si2415 "2434" = Si2434 "2457" = Si2457 Diagnostic results 1. See "AN93: Modem Designer's Guide" for details. Diagnostic results 2. See "AN93: Modem Designer's Guide" for details. Speaker volume operation Low speaker volume Medium speaker volume High speaker volume Speaker operation (via AOUT). Speaker is always off. Speaker is on while dialing and handshaking; off in data mode. Speaker is always on. Speaker is off while dialing, on during handshaking and retraining. Return to data mode from Command mode operation. Return to data mode. Return to data mode and perform a full retrain (at any speed except 300 bps). Return to data mode and perform rate renegotiation. Response mode. Enable result codes (see Table 14 on page 36) Disable result codes (enable quiet mode). Initiate V.23 reversal. S-register operation (see Table 15 on page 39). List contents of all S registers. Display contents of S-register n. Set S-register n to value x (where n and x are decimal values). Result code type (see Table 14 on page 36). Numeric result codes. Verbal result codes Action I1 I3 I6 I7 I8 Ln L1 L2 L3 Mn M0 M1 M2 M3 On O0 O1 O2 Qn Q0 Q1 R Sn S$ Sn? Sn=x Vn V0 V1 22 Rev. 1.1 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Xn X0 X1 X2 X3 X4 X5 Yn Y0 Y1 Z :E :I Action Call Progress Monitor (CPM)--This command controls which CPM signals are monitored and reported to the host from the Si2457/34/15/04. (See Table 14 on page 36.) Basic results; disable CPM--Blind dial (does not wait for dial tone). CONNECT message does not include speed. Extended results; disable CPM--Blind dial. CONNECT message includes speed. Extended results and detect dial tone only--Add dial tone detection to X1 mode. Does not blind dial. Extended results and detect busy only--Add busy tone detection to X1 mode. Extended results, full CPM--Full CPM enabled, CONNECT message includes speed. Extended results--Full CPM enabled including ringback detection. Adds ringback detection to X4 mode. Long space disconnect--Modem hangs up after 1.5 seconds or more of continuous space while on-line. Disable. Enable. Hard Reset--This command is functionally equivalent to pulsing the RESET pin low. (See tAT in Table 6 on page 7.) Read from serial EEPROM. Interrupt Read--This command causes the ISOmodem(R) to report the lower 8 bits of the interrupt register I/O Control 0 (U70). The CID, OCD, PPD, and RI bits also are cleared, and the INT pin (INT bit in parallel mode) is deactivated on this read. Write to serial EEPROM. Program RAM Write--This command is used to upload firmware supplied by Silicon Labs to the Si2457/34/15/04. The format for this command is AT:Paaaa,xxxx,yyyy,.... where aaaa is the first address in hexadecimal and xxxx,yyyy,.... is data in hexadecimal. Only one :P command is allowed per AT command line. No other commands can be concatenated in the :P command line. This command is only for use with special files provided by Silicon Laboratories. Do not attempt to use this command for any other purpose. User-Access Register Read--This command allows the user to read from the user-access registers. (See pages page 42-page 60.) The format is "AT:Raa", where aa = user-access address in hexadecimal. The "AT:R" command causes all the U- registers to be displayed. User-Access Register Write--This command allows the user to write to the 16-bit useraccess registers. (See page page 42.) The format is "AT:Uaa,xxxx,yyyy,zzzz,..." where aa = user-access address in hexadecimal. xxxx = Data in hexadecimal to be written to location aa. yyyy = Data in hexadecimal to be written to location (aa + 1). zzzz = Data in hexadecimal to be written to location (aa + 2). etc. :M :P :R :U Rev. 1.1 23 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +DR=X Action Data compression reporting. X Mode 0 Disabled 1 Enabled If enabled, the intermediate result code is transmitted at the point after error control negotiation. The format of this result code is as follows: Result code Mode +DR:NONE Data compression is not in use +DR:V42B Rec. V.42bis is in use in both directions +DR:V42B RD Rec. V.42bis is in use in receive direction only +DR:V42B TD Rec. V.42bis is in use in transmit directions only Controls V.42bis data compression function. A Direction 0 No compression 1 Transmit only 2 Receive only 3 Both Directions B Compression_negotiation 0 Do not disconnect if V.42 is not negotiated. 1 Disconnect is V.42 is not negotiated. C Maximum dictionary size 512 Maximum string size 6 to 250 (28 default) Enable synchronous access mode. A Specifies the mode of operation when initiating a modem connection. D Disable synchronous access mode. 6 Enable synchronous access mode when connection is completed and data state is entered. B Specifies fallback mode of operation. This parameter should not be used. C Specifies the mode of operation when answer a modem connection. D Disable synchronous access mode. 8 Enable synchronous access mode when connection is completed and data state is entered. D +ES Options +ES = A +ES = A,,C +DS Options +DS = A +DS = A,B +DS = A,B,C +DS = A,B,C,D 24 Rev. 1.1 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +ESA Options +ESA = A +ESA = A,B +ESA = A,B,C +ESA = A,B,C,E +ESA = A,B,C,E,F +ESA = A,B,C,E,F,G Action Synchronous access mode control options A Specifies action taken if an underrun condition occurs during transparent sub-mode. 0 Modem transmits 8-bit SYN sequences on idle. B Specifies action taken if an underrun condition occurs after a flag during framed submode 0 Modem transmits 8-bit HDLC flags on idle. C Specifies action taken if an underrun or overrun condition occurs after a non-flag during framed sub-mode. 0 Modem transmits abort on underrun in middle of frame. 1 Modem transmits flag on underrun in middle of frame and notifies host of underrun or overrun. D Specifies V.34 half duplex operation. This parameter should not be used. E Specifies CRC polynomial used while in framed sub-mode. 0 CRC generation checking disable. 1 16-bit CRC generation and checking is performed by the modem. F Specifies NRZI encoding and decoding. 0 NRZI encoding and decoding disabled. G Specifies SYN. 255 Class 1 Mode Enable for V.29 fast connect. X Mode 0 Off 1 Enables support for Class 1 mode for use in the V.29 fast connect mode. Class 1 Receive Carrier for V.29 fast connect. X Mode 2 Transmit V.21 (980 Hz) tone for longer than 100 ms, then send answer tone (2100/2225 Hz) for 200 ms. 95 V.29 short synchronous. 96 V.29 full synchronous. Class 1 Transmit Carrier for V.29 fast connect. X Mode 2 Transmit V.21 (980 Hz) tone. 53 Same as &T4, but transmit V.29 7200 bps. Data pattern set by S40 register. AT + FCLASS = 0 must be sent to restore the ISOmodem(R) to normal operation after test. 54 Same as &T4, but transmit V.29 9600 bps. Data pattern set by S40 register. AT + FCLASS = 0 must be sent to restore the ISOmodem to normal operation after test. 95 V.29 short synchronous. 96 V.29 full synchronous. +FCLASS = X +FRM = X +FTM = X Rev. 1.1 25 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +GCI = X Action Country settings - Automatically configure all registers for a particular country. X Country 0 Japan 9 Australia A Austria F Belgium 16 Brazil 1B Bulgaria 20 Canada 26 China 27 Columbia 2E Czech Republic 31 Denmark 35 Ecuador 3C Finland 3D France 42 Germany 46 Greece 50 Hong Kong 51 Hungary 53 India 57 Ireland 58 Israel 59 Italy 61 South Korea 69 Luxembourg 6C Malaysia 73 Mexico 7B Netherlands 7E New Zealand 82 Norway 87 Paraguay 89 Philippines 8A Poland 8B Portugal 9C Singapore 9F South Africa A0 Spain A5 Sweden A6 Switzerland B8 Russia B4 United Kingdom B5 United States FE Taiwan Note: U-registers are configured to Silicon Laboratories' recommended values. The +GCI command resets the U-registers and the S7 and S6 S-registers to default values before setting countryspecific values. Changes may be made by writing individual registers after sending the AT+GCI command. Refer to "AN93: Modem Designer's Guide" for details. +GCI? +GCI = ? List current country code setting (response is: + GCI: 26 Rev. 1.1 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +IFC Options +IFC = A +IFC = A,B Action Specifies the flow control to be implemented. A Specifies the flow control method used by the host to control data from the modem 0 None 1 Local XON/OFF flow control. Does not pass XON/XOFF character to the remote modem. 2 Hardware flow control (RTS) B Specifies the flow control method used by the modem to control data from the host 0 None 1 Local XON/OFF flow control. 2 Hardware flow control (CTS). Transmit flow control threshold. A Threshold above which the modem will generate a flow off signal <0 to 511> bytes B Threshold below which the modem will generate a flow on signal <0 to 511> bytes C Polling interval for +ITF Options +ITF = A +ITF = A,B +ITF = A,B,C +MR = X +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,F Rev. 1.1 27 Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +PCW = X Action Controls the action to be taken upon detection of call waiting. X Mode 0 Toggle RI and collect type II Caller ID if enabled by +VCID. 1 Hang up. 2 Ignore call waiting. Caller ID Type. X Mode 0 After ring only 1 Always on 2 UK 3 Japan Caller ID Enable. X Mode 0 Off 1 On--formatted 2 On--raw data format Type II caller ID information -- The Si2493 will display "+VCDIR:" followed by raw caller ID information including checksum. +VCDT = X +VCID = X +VCIDR? 28 Rev. 1.1 Si2457/34/15/04 4.20. Extended AT Commands The extended AT commands are supported by the Si2457/34/15/04 and are described in Tables 11 through 13. Table 11. Extended AT& Command Set (Command Defaults in Bold) Command &$ &D0 &D1 &D2 &D3 &F &Gn Display AT& current settings. ESC is not used ESC escapes to command mode from data mode if also enabled by HES U70, bit 15. ESC assertion during a modem connection causes the modem to go on-hook and return to command mode. ESC assertion causes ATZ command (reset and return OK result code). Restore factory default settings. Line connection rate limit--This command sets an upper limit on the line speed that the Si2457/34/ 15/04 can connect. Note that the &Hn commands may limit the line speed as well (&Gn not used for &H0 or &H1). Not all modulations support rates given by &G. Any improper setting will be ignored. 1200 bps max 2400 bps max (default for Si2404) 4.8 kbps max 7.2 kbps max 9.6 kbps max 12 kbps max 14.4 kbps max (default for Si2415) 16.8 kbps max 19.2 kbps max 21.6 kbps max 24 kbps max 26.4 kbps max 28.8 kbps max 31.2 kbps max 33.6 kbps max (default for Si2457 and Si2434) Switched network handshake mode--&Hn commands must be on a separate command line from ATD, ATA, or ATO commands. V.90 with automatic fallback (56 kbps to 300 bps) (default for Si2457) V.90 only (56 kbps to 28 kbps) V.34 with automatic fallback (33.6 kbps to 300 bps) (default for Si2434) V.34 only (33.6 kbps to 2400 bps) Action &G3 &G4 &G5 &G6 &G7 &G8 &G9 &G10 &G11 &G12 &G13 &G14 &G15 &G16 &G17 &Hn &H0 &H1 &H2 &H3 Rev. 1.1 29 Si2457/34/15/04 Table 11. Extended AT& Command Set (Command Defaults in Bold) (Continued) Command &H4 &H5 &H6 &H7 &H8 &H9 &H10 &H11 &Pn &P0 &P1 &Tn &T0 &T2 Action ITU-T V.32bis with automatic fallback (14.4 kbps to 300 bps) (default for Si2415) ITU-T V.32bis only (14.4 kbps to 4800 bps) ITU-T V.22bis only (2400 bps or 1200 bps) ITU-T V.22 only (1200 bps) Bell 212 only (1200 bps) Bell 103 only (300 bps) ITU-T V.21 only (300 bps) V.23 (1200/75 bps) Japan pulse dialing Configure Si2457/34/15/04 for 10 pulse-per-second pulse dialing. For Japan. Configure Si2457/34/15/04 for 20 pulse-per-second pulse dialing. For Japan. Test mode Cancel test mode (Escape to command mode to issue AT&T0). This command will also report the number of bit errors encountered on the previous &T4 or &T5 test. Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the DSP (Si2457/34/15/04 device) only. ISOmodem(R) echoes data from TX pin (Register 0 in parallel mode) back to RX pin (Register 0 in parallel mode). Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the DSP (Si2457/34/15/04), DAA interface section (Si2457/34/15/04), DAA interface (Si3018), and analog hybrid circuit (Si3018). ISOmodem echoes data from TX pin (Register 0 in parallel mode) back to RX pin (Register 0 in parallel mode). Phone line termination required as in Figure 1. To test only the link operation, the hybrid and AFE codec can be removed from the test loop by setting the DL bit (U62, bit 1). Initiate transmit as originating modem with automatic data generation. Modulation, data rate, and symbol rate are set by &H, &G, and S41. Data pattern is set by the S40 register. Continues until the ATH command is sent after an escape into command mode. Data is also demodulated as in ANALOOP, and any bit errors are counted to be displayed after the test using &T0. Initiate transmit as answering modem with automatic data generation. Modulation, data rate, and symbol rate are set by &H, &G, and S41. Data pattern is set by the S40 register. Continues until the ATH command is sent after an escape into command mode. Data is also demodulated as in ANALOOP, and any bit errors are counted to be displayed after the test using &T0. Compute checksum for firmware-upgradeable section of program memory. If no firmware upgrade is installed, &T6 returns 0x4474. Automatic determination of telephone line type. Abort &x1 or &x2 command. &T3 &T4 &T5 &T6 &Xn &X0 30 Rev. 1.1 Si2457/34/15/04 Table 11. Extended AT& Command Set (Command Defaults in Bold) (Continued) Command &X1 Action Automatic determination of telephone line type. Result code: WXYZn W: 0 = line supports DTMF dialing. 1 = line is pulse dial only. X: 0 = line supports 20 pps dialing. 1 = line supports 10 pps dialing only. Y: 0 = extension network present (PBX). 1 = outside line (PSTN) connected directly. Z: 0 = continuous dialtone. 1 = make-break dialtone. n: 0-9 (number required for outside line if Y = 0). Note: The initial number attempted for an outside line is controlled in S51. &X2 Same as &X1, but Y result (PBX) is not tested. Produce a constant answer tone (ITU-T) and return to command mode. The answer tone continues until the ATH command is received or the S7 timer expires. Enter low-power wake-on-ring mode. *Y2A &Z Table 12. Extended AT% Command Set (Command Defaults in Bold) Command %$ %B %Cn %C0 %C1 %C2 %C3 %On %O1 %O2 %Vn Display AT% command settings. Report blacklist. See also S42 register. Data compression Disable V.42bis and MNP5 data compression Enable V.42bis in transmit and receive paths. If MNP is selected (\N2), then %C1 enables MNP5 in transmit and receive paths. Enable V.42bis in transmit path only. Enable V.42bis in receive path only. Answer mode. Si2457/34/15/04 will auto-answer a call in answer mode. Si2457/34/15/04 will auto-answer a call in originate mode. Automatic Line Status Detection. After the %V1 and %V2 commands are issued, the Si2457/34/15/04 will automatically check the telephone connection for whether or not a line is present. If a line is present, the Si2457/34/15/04 will automatically check if the line is already in use. Finally, the Si2457/34/15/04 will check line status both before going off-hook and again before dialing. %V1 uses the fixed method, and %V2 uses the adaptive method. %V0 (default) disables this feature. Disable automatic line-in-use detection. Action %V0 Rev. 1.1 31 Si2457/34/15/04 Table 12. Extended AT% Command Set (Command Defaults in Bold) (Continued) Command %V1 Action Automatic Line Status Detection--Fixed Method. Description: Before going off-hook with the ATD, ATO, or ATA commands, the Si2457/34/15/04 compares the line voltage (via LVCS) to registers NOLN (U83) and LIUS (U84): Loop Voltage 0 LVCS NOLN NOLN LVCS LIUS LIUS LCVS Action Report "NO LINE" and remain on-hook. Report "LINE IN USE" and remain on-hook. Go off-hook and establish a modem connection. Once the call has begun, the off-hook intrusion algorithm (described in "4.12.2. Off-Hook Intrusion Detection" on page 18) operates normally. In addition, the Si2457/34/15/04 will report "NO LINE" if the telephone line is completely disconnected. If the HOI bit (U77, bit 11) is set, "LINE IN USE" is reported upon intrusion. %V2 Automatic Line Status Detection--Adaptive Method. Description: Before going off-hook with the ATD, ATO, or ATA commands, the Si2457/34/15/04 compares the line voltage (via LVCS) to the NLIU (U85) register: Loop Voltage Action 0 LVCS (0.0625 x NLIU) Report "NO LINE" and remain on-hook. (0.0625 x NLIU) < LVCS (0.85 x NLIU) Report "LINE IN USE" and remain on-hook. (0.85 x NLIU) < LCVS Go off-hook and establish a modem connection. The NLIU register is updated every 1 ms with the minimum non-zero value of LVCS in the last 30 ms. This allows the Si2457/34/15/04 to eliminate errors due to 50/60 Hz interference and also adapt to relatively slow change in the on-hook dc reference value on the telephone line. This algorithm does not allow any non-zero values for NLIU below 0x0007. The host may also initialize NLIU prior to issuing the %V2 command. Once the call has begun, the off-hook intrusion algorithm (described in "4.12.2. Off-Hook Intrusion Detection" on page 18) operates normally. In addition, the Si2457/34/15/04 will report "NO LINE" if the telephone line is completely disconnected. If the HOI (U77, bit 11) bit is set, "LINE IN USE" is reported upon intrusion. 32 Rev. 1.1 Si2457/34/15/04 Table 13. Extended AT\ Command Set (Command Defaults in Bold) Command \$ \Bn \B0 \B1 \B2 \B3 \B5 \B6 \Nn \N0 \N2 \N3 \N4 \N5 \Pn \P0 \P1 \P2 \P3 \Qn \Q0 \Q2 Display AT\ command settings. Character length will be automatically set in autobaud mode 6N1--six data bits, no parity, one stop bit, one start bit, eight bits total (\N0 only)1 7N1--seven data bits, no parity, one stop bit, one start bit, nine bits total (\N0 only)1 7P1--seven data bits, parity optioned by \P, one stop bit, one start bit, 10 bits total 8N1--eight data bits, no parity, one stop bit, one start bit, 10 bits total 8P1--eight data bits, parity optioned by \P, one stop bit, one start bit, 11 bits total (\N0 only) 8X1--eight data bits, one escape bit, one stop bit, one start bit, 11 bits total (enables ninth-bit escape mode) Asynchronous protocol Wire mode (no error correction, no compression) MNP reliable mode. The Si2457/34/15/04 attempts to connect with the MNP protocol. If unsuccessful, the call is dropped. V.42 auto-reliable--The Si2457/34/15/04 attempts to connect with the V.42 protocol. If unsuccessful, the MNP protocol is attempted. If unsuccessful, wire mode is attempted. V.42 (LAPM) reliable mode (or drop call)--Same as \N3 except that the Si2457/34/15/04 drops the call instead of connecting in MNP or wire mode. V.42 and MNP reliable mode--The Si2457/34/15/04 attempts to connect with V.42. If unsuccessful, MNP is attempted. If MNP us unsuccessful, the call is dropped. Parity type will be automatically set in autobaud mode Even Space1 Odd Mark1 Modem-to-DTE flow control Disable all flow control--This may only be used if the DTE speed and the VF speed are guaranteed to match throughout the call. Use CTS only Action Notes: 1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected. This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by sending AT\T17\B1. 2. The autobaud feature does not detect this rate. Rev. 1.1 33 Si2457/34/15/04 Table 13. Extended AT\ Command Set (Command Defaults in Bold) (Continued) Command \Q3 \Q4 \Tn Use RTS/CTS Use XON/XOFF flow control for modem-to-DTE interface. Does not enable modem-to-modem flow control. DTE rate--Change DTE rate. When the Si2457/34/15/04 is configured in autobaud mode (default), \T0 through \T15 will lock the new baud rate and disable autobaud. On the 24-pin version, the ISOmodem(R) is not in autobaud mode (pin 18 low on powerup), the result code "OK" is sent at the old DTE rate. Subsequent commands must be sent at the new rate. 300 bps 600 bps 1200 bps 2400 bps 4800 bps 7200 bps 9600 bps 12.0 kbps2 14.4 kbps 19.2 kbps 38.4 kbps 57.6 kbps 115.2 kbps 230.4 kbps 245.760 kbps2 307.200 kbps Autobaud on Autobaud off; lock at current baud rate. Serial mode--causes a low pulse (25 ms) on RI and DCD. INT to be the inverse of ESC. RTS to be inverse of CTS. Parallel mode--causes a low pulse (25 ms) on INT. This command terminates with a RESET. Action \T0 \T1 \T2 \T3 \T4 \T5 \T6 \T7 \T8 \T9 \T10 \T11 \T12 \T13 \T14 \T15 \T16 \T17 \U Notes: 1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected. This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by sending AT\T17\B1. 2. The autobaud feature does not detect this rate. 34 Rev. 1.1 Si2457/34/15/04 Table 13. Extended AT\ Command Set (Command Defaults in Bold) (Continued) Command \Vn \V0 \V2 \V4 Connect message type Report connect message and protocol message Report connect message only (exclude protocol message) Report connect and protocol message with both upstream and downstream connect rates. Action Notes: 1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected. This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by sending AT\T17\B1. 2. The autobaud feature does not detect this rate. Rev. 1.1 35 Si2457/34/15/04 Table 14. Result Codes Numeric 0 1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 17 18 19 20 21 22 23 24 30 31 32 33 40 41 42 Meaning Command was successful OK Verbal Response X0 X X X X X X1 X X X X X X X2 X X X X X X X X X X X X X 1 X3 X X X X X X X4 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X5 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Link established at 300 bps CONNECT or higher Incoming ring detected Link dropped Command failed Link establish at 1200 Dial tone not present Line busy Remote not answering Ringback detected Link established at 2400 Link established at 4800 Link established at 9600 Link established at 19200 Link established at 7200 Link established at 12000 Link established at 14400 Link established at 16800 Link established at 21600 Link established at 24000 Link established at 26400 Link established at 28800 Link established at 31200 Link established at 33600 Caller ID mark detected Hookswitch flash detected UK CID State Tone Alert Signal detected Overcurrent condition Blacklist is full RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER RINGING CONNECT 2400 CONNECT 48001 CONNECT 9600 1 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X CONNECT 19200 CONNECT 72001 CONNECT 12000 CONNECT 14400 CONNECT 16800 CONNECT 24000 CONNECT 26400 CONNECT 28800 CONNECT 33600 CIDM FLASH STAS X2 X X X X X X X X X X X X X X X X X X X X X X X X X 1 1 2 CONNECT 216002 2 2 2 CONNECT 312002 2 BLACKLIST FULL (enabled via S42 register) Attempted number is black- BLACKLISTED (enabled via listed. S42 register) No phone line present NO LINE (enabled via %Vn commands) Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434. 3. X is the only verbal response code that does not follow the 36 Rev. 1.1 Si2457/34/15/04 Table 14. Result Codes (Continued) Numeric 43 44 45 52 60 61 63 64 65 66 67 68 69 70 75 77 79 80 81 82 83 90 91 92 93 94 95 96 97 98 Meaning Telephone line is in use A polarity reversal was detected Verbal Response LINE IN USE (enabled via %Vn commands) POLARITY REVERSAL (enabled via G modifier) X0 X X X X1 X X X X X X X X X X X X X X X2 X X X X X X X X X X X X X X X3 X X X X X X X X X X X X X X X4 X X X X X X X X X X X X X X X5 X X X X X X X X X X X X X X A polarity reversal was NOT NO POLARITY REVERSAL detected (enabled via G modifier) Link established at 56000 Link established at 32000 Link established at 48000 Link established at 28000 Link established at 29333 Link established at 30666 Link established at 33333 Link established at 34666 Link established at 36000 Link established at 37333 No protocol Link established at 75 V.42 protocol V.42bis protocol MNP2 protocol MNP3 protocol MNP4 protocol MNP5 protocol Link established at 38666 Link established at 40000 Link established at 41333 Link established at 42666 Link established at 44000 Link established at 45333 Link established at 46666 Link established at 49333 Link established at 50666 CONNECT 560004 CONNECT 32000 CONNECT 48000 CONNECT 28000 CONNECT 30666 CONNECT 33333 CONNECT 34666 CONNECT 37333 CONNECT 75 PROTOCOL: V42 PROTOCOL: V42bis PROTOCOL: ALTERNATE, + CLASS 2 PROTOCOL: ALTERNATE, + CLASS 3 PROTOCOL: ALTERNATE, + CLASS 4 PROTOCOL: ALTERNATE, + CLASS 5 CONNECT 386664 CONNECT CONNECT CONNECT CONNECT CONNECT CONNECT 400004 426664 440004 453334 493334 506664 CONNECT 413334 4 4 4 CONNECT 293334 4 4 4 CONNECT 360004 4 PROTOCOL: NONE Set with \V0 command. Set with \V0 command. Set with \V0 command. Set with \V command. Set with \V command. Set with \V command. X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X CONNECT 466664 Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434. 3. X is the only verbal response code that does not follow the Rev. 1.1 37 Si2457/34/15/04 Table 14. Result Codes (Continued) Numeric 99 100 101 102 Meaning Link established at 52000 Link established at 53333 Link established at 54666 DTMF dial attempted on a pulse dial only line Verbal Response CONNECT 52000 4 3 3 X0 X1 X X X X2 X X X X X3 X X X X X4 X X X X X5 X X X X CONNECT 53333 CONNECT 54666 UN-OBTAINABLE NUMBER X X Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434. 3. X is the only verbal response code that does not follow the The connect messages shown in Table 14 are sent when link negotiation is complete. 38 Rev. 1.1 Si2457/34/15/04 5. S-Registers The S command allows reading (Sn?) or writing (Sn = x) the S-registers. The S-registers store values for functions that typically are rarely changed, such as timers or counters, and the ASCII values of control characters, such as carriage return. Table 15 summarizes the S-register set. Table 15. S-Register Description Definition S-Register (Decimal) 0 Function Default (Decimal) 0 Range Units Automatic answer--Number of rings the Si2457/34/15/ 04 must detect before answering a call. 0 disables auto answer. Ring counter. ESC code character. Carriage return character. Linefeed character. Backspace character. Dial tone wait timer--Number of seconds the Si2457/ 34/15/04 waits before blind dialing. Only applicable if blind dialing is enabled (X0, X1, X3). Carrier wait timer--Number of seconds the Si2457/34/ 15/04 waits for carrier before timing out. This register also sets the number of seconds the modem waits for ringback when originating a call before hanging up. This register also sets the number of seconds the answer tone will continue while using the AT Y2A command. 0-255 Rings 1 2 3 4 5 6 0 43 (+) 13 (CR) 10 (LF) 08 (BS) 02 0-255 0-255 0-255 0-255 0-255 0-255 Rings ASCII ASCII ASCII ASCII seconds 7 80 0-255 seconds * 8 9 Dial pause timer for , and < dial command modifiers. Carrier presence timer--Time after a loss of carrier that a carrier must be detected before reactivating DCD. S9 is referred to as "carrier loss debounce time." Carrier loss timer--Time the carrier must be lost before the Si2457/34/15/04 disconnects. Setting 255 disables disconnect entirely. If S10 is less than S9, even a momentary loss of carrier causes a disconnect. Escape code guard timer--Minimum guard time required before and after "+++" for the Si2457/34/15/ 04 to recognize a valid escape sequence. Wait for dial tone delay value (in relation to the W dial modifier). Starts when "W" is executed in the dial string. 02 06 0-255 1-255 seconds 0.1 second 10 14 1-255 0.1 second 12 50 1-255 0.02 second 14 12 0-255 seconds Rev. 1.1 39 Si2457/34/15/04 Table 15. S-Register Description (Continued) Definition S-Register (Decimal) 24 Function Default (Decimal) 0 Range Units Sleep Inactivity Time--Sets the time that the modem operates in normal power mode with no activity on the serial port, parallel port, or telephone line before entering low-power sleep mode. This feature is disabled if the timer is set to 0. Disconnect Activity Timer--Sets the length of time that the modem stays online before disconnecting with no activity on the serial port, parallel port, or telephone line (Ring, hookswitch flash, or caller ID). This feature is disabled if set to 0. Hang Up Delay Time--Maximum delay between receipt of ATH0 command and hang up. If time out occurs before all data can be sent, the NO CARRIER (3) result code is sent (operates in V.42 mode only). "OK" response is sent if all data is transmitted before timeout. S38 = 255 disables timeout and modem disconnects only if data is successfully sent or carrier is lost. Data Pattern--Data pattern generated during &T4 and &T5 transmit tests. 0 = All spaces (0s) 1 = All marks (1s) 2 = Random data V.34 symbol rate - Symbol rate for V.34 when using the &T4 and &T5 commands. 0 = 2400 symbols/second 1 = 2743 symbols/second 2 = 2800 symbols/second 3 = 3000 symbols/second 4 = 3200 symbols/second 5 = 3429 symbols/second A valid combination of symbol rate (S41) and data rate (&G) must be selected. Symbol Rate Allowable Data Rates 2400 2400-21600 2743 4800-26400 2800 4800-26400 3000 4800-28800 3200 4800-31200 3429 4800-33600 0-255 seconds 30 0 0-255 minutes 38 20 0-255 seconds 40 0 0-2 41 0 0-5 40 Rev. 1.1 Si2457/34/15/04 Table 15. S-Register Description (Continued) Definition S-Register (Decimal) 42 Function Default (Decimal) 0 (disabled) Range Units Blacklisting--The Si2457/34/15/04 will not dial the same number more than two times in three minutes. An attempt to dial a third time within three minutes will result in a "BLACKLISTED" result code. If the blacklist memory is full, any dial to a new number will result in a "BLACKLIST FULL" result code. Numbers are added to the blacklist only if the modem connection fails. The %B command will list the numbers on the blacklists. 0 = disabled 1 = enabled Dial Attempts to Blacklist. When blacklisting is enabled with S42, this value controls the number of dial attempts that will result in a number being blacklisted. Blacklist Timer. Period during which blacklisting is active. Minimum on-hook time--Modem will remain on-hook for S50 seconds. Any attempt to go off-hook will be delayed until this timer expires. Number to start checking for an outside line on a PBX. See &X command for details. 0-1 43 4 0-4 -- 44 50 180 3 0-255 0-255 seconds seconds 51 1 0-9 -- Rev. 1.1 41 Si2457/34/15/04 6. User-Access Registers (U-Registers) The :U AT command is used to write these 16-bit U-registers, and the :R command is used to read them. U-registers are identified by a hexidecimal (hex) address. Table 16. U-Register Description Register U00 U01 U02 U03 U04 U05 U06 U07 U08 U09 U0A U0B U0C U0D U0E U0F U10 U11 U12 U13 U14 U15 U16 Name DT1A0 DT1B1 DT1B2 DT1A2 DT1A1 DT2A0 DT2B1 DT2B2 DT2A2 DT2A1 DT3A0 DT3B1 DT3B2 DT3A2 DT3A1 DT4A0 DT4B1 DT4B2 DT4A2 DT4A1 DTK DTON DTOF Dial tone detect filter output scaler. Dial tone detect ON threshold. Dial tone detect OFF threshold. Dial tone detect filters stage 4 biquad coefficients. Dial tone detect filters stage 3 biquad coefficients. Dial tone detect filters stage 2 biquad coefficients. Description DT1 registers set the coefficients for stage 1 of the Dial Tone Detect filter. Default is for FCC countries. See "AN93: Modem Designer's Guide" for other country settings. Default 0x0800 0x0000 0x0000 0x0000 0x0000 0x00A0 0x6EF1 0xC4F4 0xC000 0x0000 0x00A0 0x78B0 0xC305 0x4000 0xB50A 0x0400 0x70D2 0xC830 0x4000 0x80E2 0x0009 0x00A0 0x0070 42 Rev. 1.1 Si2457/34/15/04 Table 16. U-Register Description (Continued) Register U17 U18 U19 U1A U1B U1C U1D U1E U1F U20 U21 U22 U23 U24 U25 U26 U27 U28 U29 U2A U2B U2C U2D U2E U2F U30 U31 U32 Name BT1A0 BT1B1 BT1B2 BT1A2 BT1A1 BT2A0 BT2B1 BT2B2 BT2A2 BT2A1 BT3A0 BT3B1 BT3B2 BT3A2 BT3A1 BT4A0 BT4B1 BT4B2 BT4A2 BT4A1 BTK BTON BTOF BMTT BDLT BMOT RMTT RDLT Busy tone detect filter output scaler. Busy tone detect ON threshold. Busy tone detect OFF threshold. Busy cadence minimum total time in seconds multiplied by 7200. See "AN93: Modem Designer's Guide" for details. Busy cadence delta in seconds multiplied by 7200. Busy cadence minimum on time in seconds multiplied by 7200. Ringback cadence minimum total time in seconds multiplied by 7200. Ringback cadence delta in seconds multiplied by 7200. Busy tone detect filter stage 4 biquad coefficients. Busy tone detect filter stage 3 biquad coefficients. Busy tone detect filter stage 2 biquad coefficients. Description BT1 registers set the coefficients for stage 1 of the Busy Tone Detect filter. Default is for FCC countries. See "AN93: Modem Designer's Guide" for other country settings. Default 0x0800 0x0000 0x0000 0x0000 0x0000 0x00A0 0x6EF1 0xC4F4 0xC000 0x0000 0x00A0 0x78B0 0xC305 0x4000 0xB50A 0x0400 0x70D2 0xC830 0x4000 0x80E2 0x0009 0x00A0 0x0070 0x0870 0x25F8 0x0438 0x4650 0xEF10 Rev. 1.1 43 Si2457/34/15/04 Table 16. U-Register Description (Continued) Register U33 U34 U35 U37 U38 U39 U3A U3B U3C U3D U3E U3F U40 U42 U43 U45 U46 Name RMOT DTWD DMOT PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 PD8 PD9 PDBT PDMT PDIT DTPL Description Ringback cadence minimum on time in seconds multiplied by 7200. Window to look for dialtone in seconds multiplied by 1000. Minimum dialtone on time in seconds multiplied by 7200. Number of pulses to dial 0. Number of pulses to dial 1. Number of pulses to dial 2. Number of pulses to dial 3. Number of pulses to dial 4. Number of pulses to dial 5. Number of pulses to dial 6. Number of pulses to dial 7. Number of pulses to dial 8. Number of pulses to dial 9. Pulse dial break time (ms units). Pulse dial make time (ms units). Pulse dial interdigit time (ms units). DTMF power level--16-bit format is 0x0(H)(L)0 where H is the (-)dBm level of the high-frequency DTMF tone and L is the (-)dBm level of the low-frequency DTMF tone. Note that twist may be specified here. DTMF on time (ms units). DTMF off time (ms units). Ring frequency high--Maximum frequency ring to be considered a valid ring. RGFH = 2400/(maximum ring frequency). Ring delta 1 1 RGFD = 2400 Hz x ---------------------------------------------- - ----------------------------------------------- min ring freq (Hz) max ring freq (Hz) Default 0x1200 0x1B58 0x2D00 0x000A 0x0001 0x0002 0x0003 0x0004 0x0005 0x0006 0x0007 0x0008 0x0009 0x003D 0x0027 0x0320 0x09B0 U47 U48 U49 U4A DTNT DTFT RGFH RGFD 0x0064 0x0064 0x0022 0x007A U4B U4C U4D U4E RGMN RGNX MOD1 PRDD Ring cadence minimum ON time in seconds multiplied by 2400. Ring cadence maximum total time in seconds multiplied by 2400. This is a bit-mapped register. Pre-dial delay-time after ATD command that modem waits to dial (ms units). The Si2457/34/15/04 stays on-hook during this time. 0x0258 0x6720 0x0000 0x0000 44 Rev. 1.1 Si2457/34/15/04 Table 16. U-Register Description (Continued) Register U4F U50 U51 U52 Name FHT LCDN LCDF XMTL Description Flash Hook Time. Time corresponding with "!" or "&" dial modifier that the Si2457/34/15/04 goes on-hook during a flash hook (ms units). Loop current debounce on time (ms units). Loop current debounce off time (ms units). Transmit level (1 dB units)--Sets the modem data pump transmitter level. Default level of 0 corresponds to -9.85 dBm. Transmit level = -(9.85 + XMTL) dBm. Range = -9.85 to -48. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. This is a bit-mapped register. No-Line threshold. If %V1 is set, NOLN sets the threshold for determination of line present vs. line not present. Line-in-use threshold. If %V1 is set, LIUS sets the threshold for determination of line in use vs. line not in use. Line-in-use/No line threshold. If %V2 is set, NLIU sets the threshold reference for the adaptive algorithm (see %V2). V.90 rate adjustment for Japan (1333 BPS units). Default 0x01F4 0x015E 0x00C8 0x0000 U53 U62 U63 U65 U66 U67 U68 U6A U6C U6E U6F U70 U71 U76 U77 U78 U79 U7A U83 U84 U85 U86 MOD2 DAAC1 DAAC3 DAAC4 DAAC5 ITC1 ITC2 ITC4 LVS CK1 PTMR IO0 IO1 GEN1 GEN2 GEN3 GEN4 GENA NOLN LIUS NLIU V9AGG 0x0000 0x0804 0x0003 0x00E0 0xXX40 0x0008 0x0000 N/A 0xXX00 0xXF20 0x00FF 0x2700 0x0000 0x3240 0x401E 0x0000 0x00XX 0x0000 0x0001 0x0007 0x0000 0x0000 Rev. 1.1 45 Si2457/34/15/04 Table 16. U-Register Description (Continued) Register U87 U9F UA0 UA1 UA2 UA3 UA4 UA5 UA6 UA7 UA8 UA9 UAA Name SAM SASF SC0 SC1 SC2 SC3 SC4 SC5 SC6 SC7 SC8 SC9 Description This is a bit-mapped register SAS frequency detection. See "AN93: Modem Designer's Guide" for complete details. SAS cadence 0. Sets the duration of the first SAS tone (ms). SAS cadence 1. Sets the duration of the first SAS silence (ms). SAS cadence 2. Sets the duration of the second SAS tone (ms). SAS cadence 3. Sets the duration of the second SAS silence (ms). SAS cadence 4. Sets the duration of the third SAS tone (ms). SAS cadence 5. Sets the duration of the third SAS silence (ms). SAS cadence 6. Sets the duration of the fourth SAS tone (ms). SAS cadence 7. Sets the duration of the fourth SAS silence (ms). SAS cadence 8. Sets the duration of the fifth SAS tone (ms). SAS cadence 9. Sets the duration of the fifth SAS silence (ms). Default 0x0000 0x0000 0x001E 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 V29MODE This is a bit mapped register. 46 Rev. 1.1 Si2457/34/15/04 Table 17. Bit-Mapped U-Register Summary Reg. U4D U53 U62 U63 U65 U66 U67 U68 U6A U6C U6E U6F U70 U71 U76 U77 U78 U79 U7A U7C U7D U87 Name MOD1 MOD2 DAAC1 DAAC3 DAAC4 DAAC5 ITC1 ITC2 ITC4 LVS CK1 PTME IO0 IO1 GEN1 GEN2 GEN3 GEN4 GENA GENC GEND SAM NLM MINT SERM FSMS XMTT V29ENA DOP ADD RIGPO IB[1:0] IST[3:0] OHSR[7:0] HOI AOC FACL DCL[2:0] OHT[8:0] IS[7:0] LVCS[4:0] V22HD HDLC FAST RIGPOEN ATZD FDP HES TES CIDM OCDM PPDM RIM DCDM LVS[7:0] R1[4:0] PTMR[7:0] CID COMP ACL[4:0] OCD PPD RI DCD PRT MINI[1:0] ILIM DCR PWMG PDN FDT OHS DCV[1:0] BTE OVL RZ ROV RT BTD LCS[7:0] REV OHS2 ACT[3:0] PDL FOH DL Bit 15 Bit 14 TOCT Bit 13 Bit 12 NHFP Bit 11 NHFD Bit 10 CLPD Bit 9 Bit 8 FTP Bit 7 SPDM Bit 6 Bit 5 GT18 Bit 4 GT55 Bit 3 CTE Bit 2 Bit 1 Bit 0 UAA V29MODE Rev. 1.1 47 Si2457/34/15/04 6.1. Bit-Mapped U-Register Detail (defaults in bold) U4D MOD1 Bit Name Type D15 D14 TOCT R/W D13 D12 NHFP R/W D11 NHFD R/W D10 CLPD R/W D9 D8 R/W D7 R/W D6 D5 GT18 R/W D4 GT55 R/W D3 CTE R/W D2 D1 D0 FTP SPDM Reset settings = 0x0000 Bit 15 14 Name Reserved TOCT Read returns zero. Turn Off Calling Tone. 0 = Disable. 1 = Enable. Read returns zero. No Hook Flash Pulse. 0 = Disable. 1 = Enable. No Hook Flash Dial. 0 = Disable. 1 = Enable. Check Loop Current Before Dialing. 0 = Ignore. 1 = Check. Read returns zero. Force Tone or Pulse. 0 = Disable. 1 = Enable. Skip Pulse Dial Modifier. 0 = No. 1 = Yes. Read returns zero. 1800 Hz Guard Tone Enable. 0 = Disable. 1 = Enable. 550 Hz Guard Tone Enable. 0 = Disable. 1 = Enable. Calling Tone Enable. 0 = Disable. 1 = Enable. Read returns zero. Function 13 12 Reserved NHFP 11 NHFD 10 CLPD 9 8 Reserved FTP 7 SPDM 6 5 Reserved GT18 4 GT55 3 CTE 2:0 Reserved 48 Rev. 1.1 Si2457/34/15/04 U53 MOD2 Bit Name Type D15 REV R/W D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Reset settings = 0x0000 Bit 15 Name REV Function V.23 Reversing. 0 = Disable. 1 = Enable. Read returns zero. 14:0 Reserved U62 DAAC1 Bit Name Type Reset settings = 0x0804 Bit 15:12 11 10:9 8 Name Reserved Reserved Reserved OHS2 Must be set to 0. Must be set to 1. Must be set to 0. On-Hook Speed 2. This bit works in combination with the OHS bit (U67, bit 6) to set the on-hook speed. The onhook speeds are measured from the time the OH bit is cleared until loop current equals zero. OHS OHS2Mean On-Hook Speed 0 0 Less than 0.5 ms 0 1 3 ms 10% (meets ETSI standard) 1 X 26 ms 10% (meets Australia spark quenching spec) Must be set to 0. Fast Off-Hook. 0 = Automatic Calibration Time set to 426 ms. 1 = Automatic Calibration Time set to 106 ms. Isolation Digital Loopback (see the AT&T commands). 0 = Loopback occurs beyond the DAA interface, out to and including the analog hybrid circuit. 1 = Enables digital loopback mode across isolation barrier only. Clear after test is terminated. Must be set to 0. Function D15 0 D14 0 D13 0 D12 0 D11 1 D10 0 D9 0 D8 OHS2 R/W D7 0 D6 0 D5 0 D4 0 D3 0 D2 FOH D1 DL D0 0 R/W R/W 7:3 2 Reserved FOH 1 DL 0 Reserved Rev. 1.1 49 Si2457/34/15/04 U63 DAAC3 Bit Name Type Reset settings = 0x0003 Bit 15:8 7:4 Name LCS[7:0] ACT[3:0] Off-Hook Loop Current (1.1 mA/bit). AC Termination Select. ACT[3:0] AC Termination 0000 Real 600 0011 220 + (820 || 120 nF) and 220 + (820 || 115 nF) 0100 370 + (620 || 310 nF) 1111 Global complex impedance Read returns 0x3. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 LCS[7:0] ACT[3:0] R/W 3:0 Reserved U65 DAAC4 Bit Name Type D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 PDL R/W D3 D2 D1 D0 PWMG PDN R/W R/W Reset settings = 0x00E0 Bit 15 14 Name Reserved PWMG Read returns zero. PWM Gain. 0 = No gain. 1 = 6 dB gain applied to AOUT. Powerdown. Completely powerdown the Si2457/34/15/04 and Si3018. Once set to 1, the Si2457/34/15/04 must be reset to power on. 0 = Normal. 1 = Powerdown. Read returns zero. Must not change in a read-modify-write. Powerdown Line-Side Chip. 0 = Normal operation. 1 = Places the Si3018 in powerdown mode. Must not change in a read-modify-write. Function 13 PDN 12:8 7:5 4 Reserved Reserved PDL* 3:0 Reserved *Note: Typically used only for board-level debug. 50 Rev. 1.1 Si2457/34/15/04 U66 DAAC5 Bit Name Type Reset settings = 0xXX40 Bit 15:7 6 Name Reserved FDT* Do not modify. Frame Detect. 0 = Indicates ISOmodem has not established frame lock. 1 = Indicates ISOmodem frame lock has been established. Read returns zero. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 FDT R D5 D4 D3 D2 D1 D0 5:0 Reserved *Note: Typically used only for board-level debug. Rev. 1.1 51 Si2457/34/15/04 U67 ITC1 Bit Name Type Reset settings = 0x0008 Bit Name Function D15 D14 D13 D12 D11 D10 D9 ILIM R/W D8 D7 R/W D6 R/W D5 D4 D3 D2 D1 RZ R/W D0 RT R/W MINI[1:0] R/W DCR OHS DCV[1:0] R/W 15:14 Reserved Read returns zero. 13:12 MINI[1:0] Minimum Operational Loop Current. Adjusts the minimum loop current at which the DAA can operate. Increasing the minimum operational loop current can improve signal headroom at a lower TIP/RING voltage. MINI[1:0] Min Loop Current 00 10 mA 01 12 mA 10 14 mA 11 16 mA 11:10 Reserved Read returns zero 9 ILIM Current Limiting Enable. 0 = Current limiting mode disabled. 1 = Current limiting mode enabled. This mode limits loop current to a maximum of 60 mA per the TBR21 standard. DC Impedance Selection. 0 = Normal dc impedance. This mode should be used for all standard applications. 1 = 800 dc termination. On-Hook Speed. This bit works in combination with the OHS2 bit (U62, bit 8) to set the on-hook speed. The onhook speeds are measured from the time the OH bit is cleared until loop current equals zero. OHS OHS2 Mean On-Hook Speed 0 0 Less than 0.5 ms 0 1 3 ms 10% (meets ETSI standard) 1 X 26 ms 10% (meets Australia spark quenching spec) 8 7 Reserved Read returns zero. DCR 6 OHS 5:4 3:2 Reserved Read returns zero. DCV[1:0] TIP/RING Voltage Adjust. These bits adjust the voltage on the DCT pin of the line-side device, which affects the TIP/RING voltage on the line. Low voltage countries should use a lower TIP/RING voltage. Raising the TIP/RING voltage can improve signal headroom. DCV[1:0] DCT Pin Voltage 00 3.1 V 01 3.2 V 10 3.35 V 11 3.5 V 52 Rev. 1.1 Si2457/34/15/04 Bit 1 Name RZ Function Ringer Impedance. 0 = Maximum (high) ringer impedance. 1 = Synthesize ringer impedance. C15, R14, Z2, and Z3 must not be installed when setting this bit. See the "Ringer Impedance" section in "AN93: Modem Designer's Guide". Ringer Threshold Select. Used to satisfy country requirements on ring detection. Signals below the lower level does not generate a ring detection; signals above the upper level are guaranteed to generate a ring detection. 0 = 11 to 22 Vrms. 1 = 17 to 33 Vrms. 0 RT U68 ITC2 Bit Name Type Reset settings = 0x0000 Bit 15:3 2 Name Reserved BTE Do not modify. Billing Tone Protect Enable. 0 = Disabled. 1 = Enabled. When set, the DAA responds automatically to a collapse of the line-derived power supply during a billing tone event. When off-hook, if BTE = 1 and BTD goes high, the dc termination is released (800 presented to line). If BTE and RIM (U70, bit 9) are set, an RI (U70, bit 1) interrupt also occurs when BTD goes high. Receive Overload. The bit is set when the receive input (i.e., receive pin goes below ground) has an excessive input level. This bit is cleared by writing a 0 to this location. 0 = Normal receive input level. 1 = Excessive receive input level. Billing Tone Detected. This bit is set if a billing tone is detected. This bit is cleared by writing a 0 to this location. 0 = No billing tone. 1 = Billing tone detected. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 BTE ROV BTD R/W R/W R/W 1 ROV 0 BTD Rev. 1.1 53 Si2457/34/15/04 U6A ITC4 Bit Name Type Reset settings = N/A Bit 15:3 2 Name Reserved OVL Read returns zero. Overload Detected. This bit has the same function as ROV, but clears itself after the overload has been removed. See the "Billing Tone Detection" section in "AN93: Modem Designer's Guide". This bit is not affected by the BTE bit. Do not modify. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 OVL R D1 D0 1:0 Reserved U6C LVS Bit Name Type Reset settings = 0xXX40 Bit 15:8 Name LVS[7:0] Function Line Voltage Status. Eight bit signed, twos complement number representing the tip-ring voltage. Each bit represents 1 V. Polarity of the voltage is represented by the MSB (sign bit). 0000_0000 = Measured voltage is < 3 V. Read returns zero. D15 D14 D13 D12 LVS[7:0] R D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 7:0 Reserved 54 Rev. 1.1 Si2457/34/15/04 U6E CK1 Bit Name Type Reset settings = 0xXF20 Bit 15:13 12:8 7:0 Name Reserved R1[4:0] Reserved Do not modify. R1 CLKOUT Divider. See "AN93: Modem Designer's Guide" for details. Read returns zero. Function D15 D14 D13 D12 D11 D10 R1[4:0] R/W D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 U6F PTMR Bit Name Type Reset settings = 0x00FF Bit 15:8 7:0 Name Reserved Do not modify Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 PTMR[7:0] R/W PTMR[7:0] Parallel Port Receive FIFO Interrupt Timer. See "AN93: Modem Designer's Guide" for details. Rev. 1.1 55 Si2457/34/15/04 U70 IO0 Bit Name Type D15 HES R/W D14 D13 TES R/W D12 R/W D11 R/W D10 R/W D9 RIM R/W D8 DCDM R/W D7 0 D6 D5 D4 CID R/W D3 OCD R/W D2 PPD R/W D1 RI R/W D0 DCD R/W CIDM OCDM PPDM Reset settings = 0x2700 Bit 15 Function Hardware Escape Pin. 0 = Disable. 1 = Enable. Reserved Read returns zero. TES Enable "+++" Escape. 0 = Disable. 1 = Enable. CIDM Caller ID Mask. 0 = Change in CID will not affect INT. 1 = A low to high transition in CID activates INT. OCDM Overcurrent Detect Mask. 0 = Change in OCD does not affect INT. ("X" result code is not generated in command mode.) 1 = A low to high transition in OCD will activate INT. ("X" result code is generated in command mode.) PPDM Parallel Phone Detect Mask. 0 = Change in PPD does not affect INT. 1 = A low to high transition in PPD will activate INT. RIM Ring Indicator. 0 = Change in RI does not affect INT. 1 = A low to high transition in RI activates INT. DCDM Data Carrier Detect Mask. 0 = Change in DCD does not affect INT. 1 = A high to low transition in DCD (U70, bit 0), which indicates loss of carrier, activates INT. Reserved Must be set to zero. Reserved Read returns zero. CID Caller ID (sticky). Caller ID preamble has been detected; data will soon follow. Clears on :I read. OCD Overcurrent Detect (sticky). Overcurrent condition has occurred. Clears on :I read. PPD Parallel Phone Detect (sticky). Parallel phone detected since last off-hook event. Clears on :I read. RI Ring Indicator. Active high bit when the Si2457/34/15/04 is on-hook, indicates ring event has occurred. Clears on :I read. DCD Data Carrier Detect (status). Active high bit indicates carrier detected (equivalent to inverse of DCD pin). Name HES 14 13 12 11 10 9 8 7 6:5 4 3 2 1 0 56 Rev. 1.1 Si2457/34/15/04 U71 IO1 Bit Name Type Reset settings = 0x0000 Bit 15:5 4 3:1 0 Name Reserved COMP Reserved PRT Read returns zero. 0 = Disables compression (PCM mode). 1 = Enables linear compression. Read returns zero. 0 = Disables PCM mode. 1 = Enables PCM mode. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 COMP R/W D3 D2 D1 D0 PRT R/W U76 GEN1 Bit Name Type Reset settings = 0x3240 Bit 15:9 8 Name Function D15 D14 D13 D12 D11 D10 D9 D8 FACL D7 D6 DCL[2:0] R/W D5 D4 D3 D2 ACL[4:0] R/W D1 D0 OHSR[6:0] R/W OHSR[6:0] Off-Hook Sample Rate (40 ms units). Sets the sample rate for the off-hook intrusion algorithms (1 second default). FACL Force ACL. 0 = While off-hook, ACL is automatically updated with LVCS. 1 = While off-hook, ACL does not change from the value written to it while on-hook. Differential Current Level (3 mA units). Sets the differential level between ACL and LVCS that will trigger an off-hook PPD interrupt (default = 2). Absolute Current Level (3 mA units). ACL represents the value of LVCS current when the ISOmodem(R) is off-hook and all parallel phones are on-hook. If ACL = 0, it is ignored by the off-hook intrusion algorithm.The ISOmodem will also write ACL with the contents of LVCS before an intrusion and before going onhook (default = 0). 7:5 DCL[2:0] 4:0 ACL[4:0] Rev. 1.1 57 Si2457/34/15/04 U77 GEN2 Bit Name Type D15 D14 D13 D12 D11 HOI R/W D10 D9 AOC R/W D8 D7 D6 D5 D4 OHT[8:0] R/W D3 D2 D1 D0 IST[3:0] R/W Reset settings = 0x401E Bit 15:12 Name IST[3:0] Intrusion Settling Time (250 ms units). Delay between when the ISOmodem goes off-hook and the off-hook intrusion algorithm begins. Default is 1 s. 11 HOI Hang-Up On Intrusion. 0 = ISOmodem will not automatically hang up when an off-hook PPD interrupt occurs. 1 = ISOmodem automatically hangs up on a PPD interrupt. If %Vn commands are set, HOI also causes the "LINE IN USE" result code upon PPD interrupt. 10 9 Reserved AOC Read returns zero. Auto Overcurrent. 0 = Disable. 1 = Enable. Note: AOC may falsely detect an overcurrent condition in the presence of line reversals or other transients. Therefore, this feature should not be used in applications or locations (such as Japan) where line reversals are common or may be expected. Function 8:0 OHT[8:0] Off-Hook Time (1 ms units). Time before LVCS is checked for overcurrent condition after going off-hook (30 ms default). 58 Rev. 1.1 Si2457/34/15/04 U78 GEN3 Bit Name Type D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 IB[1:0] R/W IS[7:0] R/W Reset settings = 0x00XX Bit 15:14 Name IB[1:0] Function Intrusion Blocking. Defines the method used to block the off-hook intrusion algorithm from operation after dialing has begun. 0 = No intrusion blocking. 1 = Intrusion disabled from start of dial to end of dial. 2 = Intrusion disabled from start of dial to IS register time-out. 3 = Intrusion disabled from start of dial to connect ("CONNECT XXX", "NO DIALTONE", or "NO CARRIER"). Read returns zero. Intrusion Suspend (500 ms units). When IB = 2, this register sets the length of time from when dialing begins that the off-hook intrusion algorithm is blocked (suspended) (default = 00000000b). 13:8 7:0 Reserved IS[7:0] Rev. 1.1 59 Si2457/34/15/04 U79 GEN4 Bit Name Type Reset settings = 0x0000 Bit 15:5 4:0 Name Reserved Read returns zero. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 LVCS[4:0] R LVCS[4:0] Line Voltage Current Sense. Represents either the line voltage, loop current, or on-hook line monitor. On-Hook Voltage Monitor (2.75 V/bit 20%). 00000 = No line connected. 00001 = Minimum line voltage (VMIN = 3.0 V 0.5 V). 11111 = Maximum line voltage (87 V 20%). The line voltage monitor full scale may be modified by changing R5 as follows: VMAX = VMIN + 4.2 (10M + R5 + 1.6k)/(R5 +1.6k)/5 Off-Hook Loop Current Monitor (3 mA/bit). 00000 = No loop current. 00001 = Minimum loop current. 11110 = Maximum loop current. 11111 = Loop current is excessive (overload). Overload > 140 mA in all modes except TBR21 Overload > 54 mA in TBR21 mode LVCS is backward compatible with Si2456/33/14 ISOmodems. The LVCS value is absolute and does not reflect loop polarity. See U6C (LVS)[15:8] for 1 V/bit resolution and signed twos complement output 60 Rev. 1.1 Si2457/34/15/04 U7A GENA Bit Name Type Reset settings = 0x0000 Bit 15:8 7 Name Reserved DOP Read returns to zero. Dial or Pulse. 0 = Normal ATDTW operation 1 = Use ATDTW for Pulse/Tone Dial Detection (see also ATDW command) Adaptive Dialing 1 = Enable 0 = Disable Attempt DTMF dial, then fall back to pulse dialing if unsuccessful. First digit is dialed as DTMF. If a dialtone is still present after two seconds, the Si2457/34/15/04 will redial the first digit and remaining digits as pulse. If a dialtone is not present after two seconds, the Si2457/ 34/15/04 will dial the remaining digits as DTMF. Read returns to zero. V.22bis Synchronous Mode.* 0 = Normal asynchronous mode. 1 = Transparent HDLC mode. Synchronous Mode.* 0 = Normal asynchronous mode. 1 = Transparent HDLC mode. Fast Connect.* 0 = Normal modem handshake timing per ITU/Bellcore standards. 1 = Fast connect modem handshake timing. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 DOP ADD R/W R/W V22HD HDLC FAST R/W R/W R/W 6 ADD 5:3 2 Reserved V22HD 1 HDLC 0 FAST *Note: When V22HD, HDLC, or FAST bits are set, \N0 (wire mode) must be used. Rev. 1.1 61 Si2457/34/15/04 U7C GENC Bit Name Type Reset settings = 0x0000 Bit 15:5 4 3:1 0 Name Reserved RIGPO Reserved Reads returns to zero. RI RI follows this bit when RIGPIOEN = 1b. Reads returns to zero. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 RIGPO R D3 D2 D1 D0 RIGPOEN R/W RIGPOEN 0 = RI indicates valid ring signal. (Normal ring-indicator mode) 1 = RI can be used as a general purpose output and follows U7C[4] (RIGPO). U7D GEND Bit Name Type D15 D14 D13 D12 D11 D10 NLM R/W D9 D8 D7 D6 D5 D4 D3 D2 D1 ATZD R/W D0 FDP R/W Reset settings = 0x0000 Bit 15 14 13:2 1 Name Reserved NLM Reserved ATZD Reads returns to zero. 0 = Enables "No Loop Current" detect. 1 = Disables "No Loop Current" detect. Reads returns to zero. ATZ Disable. 0 = ATZ functions normally. 1 = Disable ATZ command. FSK Data Processing. 0 = FSK data processing stops when carrier is lost. 1 = FSK data processing continued for 2 bytes after carrier is lost. Function 0 FDP 62 Rev. 1.1 Si2457/34/15/04 U87 SAM Bit Name Type Reset settings = 0x0000 Bit 15:11 10 Name Reserved MINT Reads returns to zero. Minimal Transparency 0 = Generates two-byte transparency sequences. This option will use codes MINT SERM FSMS R/W R/W R/W XMTT[7:0] R/W 9 SERM 8 FSMS 7:0 XMTT[7:0] Transmitter Threshold This value represents the number of bytes before a transmission is started. The following values are special: 0 The same as ten. Upon receipt of ten bytes, data is transferred. The DTE must supply a closing flag within the required time or an underrun will occur. 255 The same as infinity, e.g. never start a packet until the closing flag is received. UAA V.29 Mode Bit Name Type Reset settings = 0x0000 Bit 15:2 1 0 Name Reserved V29ENA Reserved Reads returns to zero. 0 = Disables V.29. 1 = Enables V.29. Read returns zero. Function D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 V29ENA R/W D0 Rev. 1.1 63 Si2457/34/15/04 7. Parallel Interface Registers Parallel Interface 0 (0x00) Bit Name Type Reset settings = 0x00 Bit 7:0 Name Function D7 D6 D5 D4 D3 TX/RX[7:0] R/W D2 D1 D0 TX/RX[7:0] Parallel Interface Transmit/Receive. This register functions similarly to the serial port TX pin on writes to the parallel port, and similarly to the serial port RX pin on reads from the parallel port. 64 Rev. 1.1 Si2457/34/15/04 Parallel Interface 1 (0x01) Bit Name Type D7 RXF R D6 TXE R D5 REM R D4 INTM R/W D3 INT R D2 ESC R/W D1 RTS R/W D0 CTS R Reset settings = 0110_0011 Bit 7 Name RXF Function Receive FIFO Almost Full (status). 0 = Receive FIFO (12 deep) contains three or more empty locations (RXF 9). The host can clear the RXF interrupt without emptying the RX FIFO by writing a 0 to the RXF bit. This will disable the RXF interrupt until the host has emptied the FIFO. 1 = Receive FIFO contains two or less empty locations (RXF 10). Transmit FIFO Almost Empty (status). 0 = Transmit FIFO (14 deep) contains three or more characters (TXF 3). 1 = Transmit FIFO contains two or less characters (TXF 2). Note: TXE interrupt will not trigger if the CTS bit is inactive. Therefore, the host does not need to poll CTS while waiting for transmit FIFO to empty. TXE can be cleared by writing it to 0. 6 TXE 5 REM Receive FIFO Empty. 0 = Receive FIFO has valid data. 1 = Receive FIFO empty. Note: If the interim timer (see PTMR - U6F, bits 7:0) set by PTMR expires, it will cause an interrupt. This interrupt will not set RXF, TXE, or INT. The interrupt handler on the host should then verify that REM = 0 and begin to empty the receive FIFO (Parallel Interface 0 register) until REM = 1. 4 INTM Interrupt Mask. 0 = In parallel mode, the INT pin is triggered by a rising edge on RXF or TXE only (default). 1 = In parallel mode, the INT pin is triggered by a rising edge on RXF, TXE, or INT. Interrupt. 0 = No interrupt has occurred. 1 = Indicates that an interrupt (CID, OCD, PPD, RI, or DCD from U70) has occurred. This bit is cleared via the AT:I command. Escape. Operation of this bit in parallel mode is functionally equivalent to the ESC pin in serial mode. Request-to-Send. Operation of this bit in parallel mode is functionally equivalent to the RTS pin in serial mode. Use of the CTS and RTS bits (as opposed to the TXE and RXF bits) allows the flow control between the host and the ISOmodem(R) to operate 1 byte at a time, rather than in blocks. Clear-to-Send. Operation of this bit in parallel mode is functionally equivalent to the CTS pin in serial mode. Use of the CTS and RTS bits (as opposed to the TXE and RXF bits) allows the flow control between the host and the ISOmodem to operate 1 byte at a time, rather than in blocks. 3 INT 2 1 ESC RTS 0 CTS Rev. 1.1 65 Si2457/34/15/04 8. Pin Descriptions: Si2457/34/15/04 (16-Pin Option) Si2457/34/15/04 CLKIN/XTALI XTALO RI VD RXD TXD CTS RESET 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 RTS DCD ESC VA GND INT C1A C2A Pin # 1 Pin Name CLKIN/XTALI Description XTALI--Crystal Oscillator Pin. Provides support for parallel resonant AT cut crystals. A 4.9152 MHz crystal or a 4.9152 or 27 MHz clock on XTALI is required. XTALO--Crystal Oscillator Pin. Serves as the output of the crystal amplifier. Ring Indicator. 2 3 XTALO RI The RI on (active low) indicates the presence of an ON segment of a ring signal on the telephone line. 4 5 6 7 8 VD RXD TXD CTS RESET Supply Voltage. Provides the 3.3 V supply voltage to the Si2457/34/15/04. Receive Data. Data output to DTE RXD pin. Transmit Data. Data input from DTE TXD pin. Clear to Send. Signals that the Si2457/34/15/04 is ready to receive more digital data on the TXD pin. Reset Input. An active low input that is used to reset all control registers to a defined, initialized state. Isolation Capacitor 2A. Connects to one side of the isolation capacitor C2. Isolation Capacitor 1A. Connects to one side of the isolation capacitor C1. Interrupt Output. Active low interrupt output. Ground. Connects to the system digital ground. Regulator Voltage Reference. Connects to an external capacitor and serves as the reference for the internal voltage regulator. Escape. A positive edge on this pin causes the modem to go from online (connected) mode to the offline (command) mode. Carrier Detect. Active low carrier detect. Request to Send. Active low request to send input used for flow control. 9 10 11 12 13 C2A C1A INT GND VA 14 ESC 15 16 DCD RTS 66 Rev. 1.1 Si2457/34/15/04 9. Pin Descriptions: Si2457/34/15/04 (24-Pin Option) Si2457/34/15/04 CLKIN/XTALI XTALO CLKOUT/EECS/A0 FSYNC/D6 VD3.3 GND VDA RTS/D7 RXD/RD TXD/WR CTS/CS RESET 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SDO/EECLK/D5 DCD/D4 ESC/D3 VD3.3 GND VDB SDI/EESD/D2 RI/D1 INT/DO AOUT/INT C1A C2A Pin # 1 Pin Name CLKIN/XTALI Description Clock Input/Crystal Oscillator Pin. Provides support for parallel resonant AT cut crystals. A 4.9152 MHz crystal or a 4.9152 or 27 MHz clock on XTALI is required. Crystal Oscillator Pin. Serves as the output of the crystal amplifier. 2 XTALO 3 CLKOUT/EECS/A0 Clock Output/EEPROM Chip Select/Address Bit 0. Clock output in serial mode. Active low read/write enable for SPI EEPROM in serial mode when pin 4 is pulled low during powerup. Address Enable in parallel mode. FSYNC/D6 Frame Sync/Data Bit. Frame Sync output to codec in serial mode. Bidirectional parallel bus data bit 6 in parallel mode. Digital Supply Voltage. Provides the 3.3 V supply voltage to the Si2457/34/15/04. Ground. Connects to the system digital ground. Regulator Voltage Reference. Connects to an external capacitor and serves as the reference for the internal voltage regulator. 4 5, 21 VD3.3 6, 20 GND 7,19 VDA, VDB 8 RTS/D7 Request to Send/Data Bit. Active low request to send input used for flow control in serial mode. Bidirectional parallel bus data bit 7 in parallel mode. Receive Data/Read Enable. Data output to DTE RXD pin in serial mode. Active low read enable pin in parallel mode. 9 RXD/RD Rev. 1.1 67 Si2457/34/15/04 Pin # 10 Pin Name TXD/WR Description Transmit Data/Write Enable. Data input from DTE TXD pin in serial mode. Active low write enable pin in parallel mode. Clear to Send/Chip Select. Signals that the Si2457/34/15/04 is ready to receive more digital data on the TXD pin in data mode. Active low chip select in parallel mode. Reset Input. An active low input that is used to reset all control registers to a defined initialized state. Isolation Capacitor 2A. Connects to one side of the isolation capacitor, C2. Isolation Capacitor 1A. Connects to one side of the isolation capacitor, C1. Analog Output/Interrupt Output. Analog output in serial mode. Active low interrupt output in parallel mode. Interrupt Output/Data Bit. Active low interrupt output in serial mode. Bidirectional parallel bus data bit 0 in parallel mode. Ring Indicator/Data Bit. The RI on (active low) indicates the presence of an ON segment of a ring signal on the telephone line. Bidirectional parallel bus data bit 1 in parallel mode. Serial Data In/EEPROM Serial Data Input/Output/Data Bit. Serial Data In (to codec) output in serial mode. Bidirectional Input/Output to SPI EEPROM in serial mode when pin 4 is pulled low during power up. Bidirectional parallel bus data bit 2 in parallel mode. Escape/Data Bit. Hardware escape in serial mode. Bidirectional parallel bus data bit 3 in parallel mode. Carrier Detect/Data Bit. Active low carrier detect in serial mode. Bidirectional parallel bus data bit 4 in parallel mode. Serial Data Out/EEPROM Clock/Data Bit 5. Serial Data Out (from codec) input in serial mode. Clock output for SPI EEPROM in serial mode when pin 4 is pulled low during power up. Bidirectional parallel bus data bit 5 in parallel mode. 11 CTS/CS 12 RESET 13 C2A 14 C1A 15 AOUT/INT 16 INT/D0 17 RI/D1 18 SDI/EESD/D2 22 ESC/D3 23 DCD/D4 24 SDO/EECLK/D5 68 Rev. 1.1 Si2457/34/15/04 10. Pin Descriptions: Si3018/10 Si3018/10 QE DCT RX IB C1B C2B VREG RNG1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 DCT2 IGND DCT3 QB QE2 SC VREG2 RNG2 Table 18. Si3018 Pin Descriptions Pin # 1 2 3 4 5 6 7 8 Pin Name QE DCT RX Description Transistor Emitter. Connects to the emitter of Q3. DC Termination. Provides dc termination to the telephone network. Receive Input. Serves as the receive side input from the telephone network. Internal Bias. Provides a bias voltage to the device. Isolation Capacitor 1B. Connects to one side of isolation capacitor C1 and communicates with the system side. Isolation Capacitor 2B. Connects to one side of isolation capacitor C2 and communicates with the system side. Voltage Regulator. Connects to an external capacitor to provide bypassing for an internal power supply. Ring 1. Connects through a resistor to the RING lead of the telephone line. Provides the ring and caller ID signals to the Si2457/34/15/04. Ring 2. Connects through a resistor to the TIP lead of the telephone line. Provides the ring and caller ID signals to the Si2457/34/15/04. Voltage Regulator 2. Connects to an external capacitor to provide bypassing for an internal power supply. SC Connection. Enables external transistor network. Should be tied through a 0 resistor to IGND. Transistor Emitter 2. Connects to the emitter of Q4. Transistor Base. Connects to the base of transistor Q4. DC Termination 3. Provides the dc termination to the telephone network. Isolated Ground. Connects to ground on the line-side interface. DC Termination 2. Provides dc termination to the telephone network. IB C1B C2B VREG RNG1 9 RNG2 10 11 12 13 14 15 16 VREG2 SC QE2 QB DCT3 IGND DCT2 Rev. 1.1 69 Si2457/34/15/04 11. Ordering Guide Chipset Si2457 Si2457 Si2434 Si2434 Si2415 Si2415 Si2404 Si2404 Si2457 Si2434 Si2415 Si2404 Max Speed 56 kbps 56 kbps 33.6 kbps 33.6 kbps 14.4 kbps 14.4 kbps 2400 bps 2400 bps 56 kbps 33.6 kbps 14.4 kbps 2400 bps System-Side Package 24-pin TSSOP 16-pin SOIC 24-pin TSSOP 16-pin SOIC 24-pin TSSOP 16-pin SOIC 24-pin TSSOP 16-pin SOIC 24-pin TSSOP 24-pin TSSOP 24-pin TSSOP 24-pin TSSOP System-Side* Si2457-C-FT Si2457-C-FS Si2434-C-FT Si2434-C-FS Si2415-C-FT Si2415-C-FS Si2404-C-FT Si2404-C-FS Si2457-C-GT Si2434-C-GT Si2415-C-GT Si2404-C-GT Line-Side* Si3018-F-FS Si3018-F-FS Si3018-F-FS Si3018-F-FS Si3018-F-FS Si3018-F-FS Si3010-F-FS Si3010-F-FS Si3018-F-GS Si3018-F-GS Si3018-F-GS Si3018-F-GS Temp Range 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C -40 to +85 C -40 to +85 C -40 to +85 C -40 to +85 C *Note: Add an "R" at the end of the device to denote tape and reel option; 2500 quantity per reel. 70 Rev. 1.1 Si2457/34/15/04 12. Package Outline: 24-Pin TSSOP Figure 9 illustrates the package details for the Si2457/34/15/04 24-pin packaging option. Table 19 lists the values for the dimensions shown in the illustration. ddd C B A (2x) B E H L A D B bbb C B A A e C A1 C Approximate device weight is 96 mg. Figure 9. 24-Pin Thin Shrink Small Outline Package (TSSOP) Table 19. Package Diagram Dimensions Millimeters Symbol A A1 B C D E e H L bbb ddd Min -- 0.05 0.19 0.09 7.70 4.30 Max 1.20 0.15 0.30 0.20 7.90 4.50 0.65 BSC 6.40 BSC 0.45 0 0.10 0.10 0.20 0.75 8 Rev. 1.1 71 Si2457/34/15/04 13. Package Outline: 16-Pin SOIC Figure 10 illustrates the package details for the Si3018/10 and the Si2457/34/15/04 16-pin packaging option. Table 20 lists the values for the dimensions shown in the illustration. 16 9 h E -BH bbb B L Detail F 1 B 8 aaa C A B -A- D -Ce A1 A C See Detail F Seating Plane Approximate device weight is 152 mg. Figure 10. 16-pin Small Outline Integrated Circuit (SOIC) Package Table 20. Package Diagram Dimensions Symbol A A1 B C D E e H h L aaa bbb Millimeters Min Max 1.35 1.75 .10 .25 .33 .51 .19 .25 9.80 10.00 3.80 4.00 1.27 BSC 5.80 6.20 .25 .50 .40 1.27 0.10 0 8 0.25 0.25 72 Rev. 1.1 Si2457/34/15/04 DOCUMENT CHANGE LIST Revision 0.91 to Revision 1.0 Added Figure 5 typical schematic with 16-pin system-side option. Updated Table 3 to include 16-pin system-side parameters. Updated default register setting in Table 16. Added Si2404 information. Added 16-pin system-side option. Updated "4. Functional Description" on page 16. Added "8. Pin Descriptions: Si2457/34/15/04 (16-Pin Option)" on page 66. Updated "11. Ordering Guide" on page 70 to reflect part revision. Revision 1.0 to Revision 1.1 Added industrial temperature range devices. Rev. 1.1 73 Si2457/34/15/04 CONTACT INFORMATION Silicon Laboratories Inc. 4635 Boston Lane Austin, TX 78735 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: ISOinfo@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Silicon Laboratories, Silicon Labs, and ISOmodem are registered trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. 74 Rev. 1.1 |
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