Si2404 V. 2 2 B I S I S O M O D E M ® C H I PS E T WITH ERROR CORRECTION Features Data modem formats Integrated DAA ITU-T, Bell 300 bps up to 2400 bps V.21,V.22 fast connect V.42, V.42bis, MNP2-5 Automatic rate negotiation Over 5000 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 27 MHz clock input 3.
Si2404 2 Rev. 0.
Si2404 TA B L E O F C O N T E N TS Section Page Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Bill of Materials: Si2404 Chipset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Functional Description . . . . . . . . . . . . . . . . . . . . . . . .
Si2404 Electrical Specifications Table 1. Recommended Operating Conditions Parameter1 Symbol Test Condition Min2 Typ Max2 Unit TA F-Grade 0 25 70 °C 3.0 3.3 3.6 V Ambient Temperature Si2404 Supply Voltage, Digital 3 VD Notes: 1. The Si2404 specifications are guaranteed when the typical application circuit (including component tolerance) and any Si2404 and any Si3010 are used. See "Typical Application Schematic" on page 10. 2.
Si2404 TIP + 600 Ω VTR Si3010 IL 10 µF - 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 K-Grade) Parameter Symbol Test Condition Min Typ Max Unit High Level Input Voltage VIH 2.0 — — V Low Level Input Voltage VIL — — 0.8 V High Level Output Voltage VOH IO = –2 mA 2.4 — — V Low Level Output Voltage VOL IO = 2 mA — — 0.
Si2404 Table 4. AC Characteristics (VD = 3.0 to 3.6 V, TA = 0 to 70 °C for K-Grade, Fs = 8 kHz) Parameter Symbol Sample Rate Test Condition Fs Min Typ Max Unit — 8 — kHz Clock Input Frequency FXTL default — 4.9152 — MHz Clock Input Frequency FXTL >10 kΩ resistor between pin 23 and GND — 27 — MHz Receive Frequency Response Low –3 dBFS Corner, FILT = 0 — 5 — Hz Receive Frequency Response Low –3 dBFS Corner, FILT = 1 — 200 — Hz VFS — 1.1 — VPEAK VFS — 1.
Si2404 Table 5. Absolute Maximum Ratings Parameter Symbol Value Unit DC Supply Voltage VD 4.1 V Input Current, Si2404 Digital Input Pins IIN ±10 mA Digital Input Voltage VIND –0.3 to 5.3 V CLKIN/XTALI Input Voltage VXIND –0.3 to (VD + 0.3) V TA –10 to 100 °C TSTG –40 to 150 °C Operating Temperature Range Storage Temperature Range Note: Permanent device damage may occur if the above absolute maximum ratings are exceeded.
Si2404 UART Time for Modem Receive Path (8N1 Mode) 8-B it Data M ode RX S tart tR TS D0 D1 D2 D3 D4 D5 D6 D7 S top 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 t R TS t CTH CTS Figure 2. Asynchronous UART Serial Interface Timing Diagram 8 S top Rev. 0.
Si2404 t CSS t CSH t AS t AH CS ADDRESS = 0 or 1 A0 t RL t RC RD t DZ t RLDD t DH D[7:0] VALID DATA VALID DATA t RLDD Figure 3. Parallel Interface Read Timing t CSS t CSH t AS t AH CS 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. 0.
RESET_ RTS_/D7 RXD/RD_ TXD/WR_ CTS_/CS_ CLKOUT/EECS_/A0 INT_/D0 RI_/D1 EESD/D2 EECLK/D5 DCD_/D4 ESC/D3 AOUT/INT_ D6 12 8 9 10 11 3 16 17 18 24 23 22 15 4 5 21 RESET RTS/D7 RXD/RD TXD/WR CTS/CS U1 C51 C53 Si2404 C2A C1A XTALO CLKIN/XTALI CLKOUT/EECS/A0 INT/D0 RI/D1 EESD/D2 EECLK/D5 DCD/D4 ESC/D3 AOUT/INT D6 VD3.3 VD 3.
Si2404 Bill of Materials: Si2404 Chipset Component Value Supplier(s) C1, C2 33 pF, Y2, X7R, ±20% Panasonic, Murata, Vishay C3 10 nF, 250 V, X7R, ±20% Venkel, SMEC C4 1.0 µF, 50 V, Elec/Tant, ±20% Panasonic C5, C6, C50, C52 0.1 µF, 16 V, X7R, ±20% Venkel, SMEC C7 2.7 nF, 50 V, X7R, ±20% Venkel, SMEC C8, C9 680 pF, Y2, X7R, ±10% Panasonic, Murata, Vishay 0.01 µF, 16 V, X7R, ±20% Venkel, SMEC 33 pF, 16 V, X7R, ±20% Venkel, SMEC C10 1 C40, C41 C51, C53 0.
Si2404 Table 7. Protocol Characteristics Item Specification Data Rate 2400 bps 1200 bps 300 bps 300 bps Data Format Bit asynchronous Compatibility ITU-T V.22bis ITU-T V.22bis, V.23, or Bell 212A ITU-T V.21 Bell 103 Selectable 8, 9, 10, or 11 bits per character V.23, V.22bis, V.22, V.21, Bell 212A, and Bell 103 Operating Mode Switched network Two-wire full-duplex Data Modulation 2400 bps 1200 bps 0 to 300 bps 16-level QAM/600 Baud ±0.01% 4-level PSK/600 Baud ±0.01% FSK 0–300 Baud ±0.
Si2404 Table 7. Protocol Characteristics (Continued) Item Specification Carrier Detect (level for ITU-T V.22bis, V.22, V.21, 212, 103) in Switched Network Acquisition (–43 dBm) Release (–48 dBm) Hysteresis DTE Interface 2 dBm minimum EIA/TIA-232-E (ITU-T V.24/V.28/ISO 2110) Line Equalization Connection Options Automatic Adaptive Loss of Carrier in ITU-T V.
Si2404 Functional Description Digital Interface The Si2404 ISOmodem® 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.
Si2404 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 59. If A0 = 1, the data bus represents a read/write to the “Parallel Interface 1 (0x01)” register on page 60). Command Mode Upon reset, the ISOmodem® is in command mode and accepts “AT” commands.
Si2404 Caller ID Operation The Si2404 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. Parallel Phone Detection The ISOmodem® is able to detect when another telephone, modem, or other device is using the phone line.
Si2404 Overload 30 25 CTR21 only 20 LVCS BITS 15 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 93 140 Loop Current (mA) Figure 6. Loop Current Overcurrent Detection Firmware Upgrades The Si2404 includes an overcurrent detection feature that measures the loop current at a programmable time after the Si2404 goes off-hook. This allows the Si2404 to detect if it is connected to an improper telephone line.
Si2404 AT Commands At powerup, the Si2404 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 9.) Table 9. Basic AT Command Set (Command Defaults in Bold) Command Action $ Display AT command mode settings. A Answer incoming call A/ Re-execute last command. This is the only command not preceded by “AT” or followed by a .
Si2404 Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action En Local DTE echo E0 Disable E1 Enable Hn Hook switch. H0 Go on-hook (hang up modem). H1 Go off-hook. In Identification and checksum. I0 Display Si2404 revision code. B: Revision B C: Revision C, etc. I1 Display Si2404 firmware revision code (numeric). I3 Display line-side revision code. 10C = Si3010 revision C I6 Display the ISOmodem® model number. “2404” = Si2404 I7 Diagnostic results 1.
Si2404 Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action S$ List contents of all S registers. Sn? Display contents of S-register n. Sn=x Set S-register n to value x (where n and x are decimal values). Vn Result code type (see Table 13 on page 32). V0 Numeric result codes. V1 Verbal result codes Xn Call Progress Monitor (CPM)—This command controls which CPM signals are monitored and reported to the host from the Si2404. (See Table 13 on page 32.
Si2404 Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued) Command :U Action User-Access Register Write—This command allows the user to write to the 16-bit useraccess registers. (See page 37.) 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.
Si2404 Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action +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 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.
Si2404 Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +GCI = X Action Country settings - Automatically configure all registers for a particular country.
Si2404 Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action +GCI = ? List all possible country code settings. +IFC Options +IFC = A +IFC = A,B 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.
Si2404 Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action +VCDT = X Caller ID Type. X Mode 0 After ring only 1 Always on 2 UK 3 Japan +VCID = X Caller ID Enable. X Mode 0 Off 1 On—formatted 2 On—raw data format +VCIDR? Type II caller ID information. Rev. 0.
Si2404 Extended AT Commands The extended AT commands are supported by the Si2404 and are described in Tables 10 through 12. Table 10. Extended AT& Command Set (Command Defaults in Bold) Command Action &$ Display AT& current settings. &D0 ESC (pin 22) is not used &D1 ESC (pin 22) escapes to command mode from data mode if also enabled by HES U70, bit 15. &D2 ESC (pin 22) assertion during a modem connection causes the modem to go on-hook and return to command mode.
Si2404 Table 10. Extended AT& Command Set (Command Defaults in Bold) (Continued) Command Action &T4 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.
Si2404 Table 11. Extended AT% Command Set (Command Defaults in Bold) (Continued) Command Action %C3 Enable V.42bis in receive path only. %On Answer mode. %O1 Si2404 will auto-answer a call in answer mode. %O2 Si2404 will auto-answer a call in originate mode. %Vn Automatic Line Status Detection. After the %V1 and %V2 commands are issued, the Si2404 will automatically check the telephone connection for whether or not a line is present.
Si2404 Table 12. Extended AT\ Command Set (Command Defaults in Bold) Command \$ Action Display AT\ command settings.
Si2404 Table 12. Extended AT\ Command Set (Command Defaults in Bold) (Continued) Command Action \Q3 Use RTS/CTS \Q4 Use XON/XOFF flow control for modem-to-DTE interface. Does not enable modem-to-modem flow control. \Tn DTE rate—Change DTE rate. When the Si2404 is configured in autobaud mode (default), \T0 through \T15 will lock the new baud rate and disable autobaud. When the ISOmodem® is not in autobaud mode (pin 18 low on powerup), the result code “OK” is sent at the old DTE rate.
Si2404 Table 12. Extended AT\ Command Set (Command Defaults in Bold) (Continued) Command Action \U 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.
Si2404 Table 13.
Si2404 Table 13. Result Codes (Continued) Numeric1 Meaning Verbal Response 82 MNP4 protocol PROTOCOL: ALTERNATE, + CLASS 4 102 DTMF dial attempted on a pulse dial only line UN–OBTAINABLE NUMBER X0 X1 X2 X3 X4 X5 Set with \V command. X X X X X X Notes: 1. Numeric result codes are of the format: Result code . 2. X is the only verbal response code that does not follow the Result Code standard. There is no leading .
Si2404 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 14 summarizes the S-register set. Table 14. S-Register Description Definition S-Register (Decimal) Function Default (Decimal) Range Units 0 Automatic answer—Number of rings the Si2404 must detect before answering a call.
Si2404 Table 14. S-Register Description (Continued) Definition S-Register (Decimal) Function Default (Decimal) Range Units 24 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.
Si2404 Table 14. S-Register Description (Continued) Definition S-Register (Decimal) 36 Function Default (Decimal) Range Units 50 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. 3 0–255 seconds 51 Number to start checking for an outside line on a PBX. See &X command for details. 1 0–9 — Rev. 0.
Si2404 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 15. U-Register Description Register Name Description Default U00 DT1A0 0x0800 U01 DT1B1 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.
Si2404 Table 15. U-Register Description (Continued) Register Name Description Default U17 BT1A0 0x0800 U18 BT1B1 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.
Si2404 Table 15. U-Register Description (Continued) Register Name Description Default U33 RMOT Ringback cadence minimum on time in seconds multiplied by 7200. 0x1200 U34 DTWD Window to look for dialtone in seconds multiplied by 1000. 0x1B58 U35 DMOT Minimum dialtone on time in seconds multiplied by 7200. 0x2D00 U37 PD0 Number of pulses to dial 0. 0x000A U38 PD1 Number of pulses to dial 1. 0x0001 U39 PD2 Number of pulses to dial 2. 0x0002 U3A PD3 Number of pulses to dial 3.
Si2404 Table 15. U-Register Description (Continued) Register Name U4F FHT U50 40 Description Default Flash Hook Time. Time corresponding with “!” or “&” dial modifier that the Si2404 goes on-hook during a flash hook (ms units). 0x01F4 LCDN Loop current debounce on time (ms units). 0x015E U51 LCDF Loop current debounce off time (ms units). 0x00C8 U52 XMTL Transmit level (1 dB units)—Sets the modem data pump transmitter level. Default level of 0 corresponds to –9.85 dBm.
Si2404 Table 15. U-Register Description (Continued) Register Name Description Default U9F SASF SAS frequency detection. See “AN93: Modem Designer’s Guide” for complete details. 0x0000 UA0 SC0 SAS cadence 0. Sets the duration of the first SAS tone (ms). 0x01E0 UA1 SC1 SAS cadence 1. Sets the duration of the first SAS silence (ms). 0x0000 UA2 SC2 SAS cadence 2. Sets the duration of the second SAS tone (ms). 0x0000 UA3 SC3 SAS cadence 3. Sets the duration of the second SAS silence (ms).
Si2404 Table 16. Bit-Mapped U-Register Summary Reg.
Si2404 Bit-Mapped U-Register Detail (defaults in bold) U4D MOD1 Bit D15 D14 D13 D12 D11 D10 Name TOCT NHFP NHFD CLPD Type R/W R/W R/W R/W D9 D8 D7 D6 D5 D4 D3 FTP SPDM GT18 GT55 CTE R/W R/W R/W R/W R/W D2 D1 D0 Reset settings = 0x0000 Bit Name Function 15 Reserved 14 TOCT 13 Reserved 12 NHFP No Hook Flash Pulse. 0 = Disable. 1 = Enable. 11 NHFD No Hook Flash Dial. 0 = Disable. 1 = Enable. 10 CLPD Check Loop Current Before Dialing. 0 = Ignore. 1 = Check.
Si2404 U53 MOD2 Bit D15 Name REV Type 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 14:0 Reserved V.23 Reversing. 0 = Disable. 1 = Enable. Read returns zero. U62 DAAC1 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Name 0 0 0 0 1 0 0 OHS2 0 0 0 0 0 FOH DL 0 Type R/W R/W R/W Reset settings = 0x0804 Bit Name 15:12 Reserved Must be set to 0. 11 Reserved Must be set to 1.
Si2404 U63 DAAC3 Bit D15 D14 D13 D12 Name D11 D10 D9 D8 D7 LCS[7:0] D6 D5 D4 D3 D2 D1 D0 D1 D0 ACT[3:0] Type R/W Reset settings = 0x0003 Bit Name Function 15:8 LCS[7:0] Off-Hook Loop Current (1.1 mA/bit). 7:4 ACT[3:0] AC Termination Select. ACT[3:0] AC Termination 0000 Real 600 Ω 0011 220 Ω + (820 Ω || 120 nF) and 220 Ω + (820 Ω || 115 nF) 0100 370 Ω + (620 Ω || 310 nF) 1111 Global complex impedance 3:0 Reserved Read returns 0x3.
Si2404 U66 DAAC5 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 Name FDT Type R D5 Reset settings = 0x0040 Bit Name Function 15:7 Reserved 6 FDT* 5:4 Reserved Read returns zero. 3:0 Reserved Do not modify. Read returns zero. Frame Detect. 0 = Indicates ISOmodem has not established frame lock. 1 = Indicates ISOmodem frame lock has been established. *Note: Typically used only for board-level debug. 46 Rev. 0.
Si2404 U67 ITC1 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 Name MINI[1:0] ILIM DCR OHS Type R/W R/W R/W R/W D5 D4 D3 D2 D1 D0 DCV[1:0] RZ RT R/W R/W R/W Reset settings = 0x0008 Bit Name Function 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.
Si2404 Bit Name Function 1 RZ 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”. 0 RT 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.
Si2404 U6A ITC4 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 Name OVL Type R D1 D0 Reset settings = N/A Bit Name Function 15:3 Reserved 2 OVL 1:0 Reserved 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.
Si2404 U6E CK1 Bit D15 D14 D13 D12 D11 D10 Name R1[4:0] Type R/W D9 D8 D7 D6 D5 D4 D5 D4 D3 D2 D1 D0 D2 D1 D0 Reset settings = 0x1F20 Bit Name 15:13 Reserved 12:8 R1[4:0] 7:0 Reserved Function Do not modify. R1 CLKOUT Divider. See “AN93: Modem Designer’s Guide” for details. Read returns zero.
Si2404 U70 IO0 Bit D15 Name Type D14 D13 D12 HES TES CIDM OCDM PPDM R/W R/W R/W D11 R/W D10 R/W D9 D8 D7 RIM DCDM 0 R/W R/W D6 D5 D4 D3 D2 D1 D0 CID OCD PPD RI DCD R/W R/W R/W R/W R/W Reset settings = 0x2700 Bit 15 14 13 12 11 10 9 8 7 6:5 4 3 2 1 0 Name HES 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.
Si2404 U71 IO1 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Name COMP PRT Type R/W R/W Reset settings = 0x0000 Bit Name 15:5 Reserved 4 COMP 3:1 Reserved 0 PRT Function Read returns zero. 0 = Disables compression (PCM mode). 1 = Enables linear compression. Read returns zero. 0 = Disables PCM mode. 1 = Enables PCM mode.
Si2404 U77 GEN2 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 Name IST[3:0] HOI AOC OHT[8:0] Type R/W R/W R/W R/W D3 D2 D1 D0 Reset settings = 0x401E Bit Name 15:12 IST[3:0] Function 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.
Si2404 U78 GEN3 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 Name IB[1:0] IS[7:0] Type R/W R/W D2 D1 D0 Reset settings = 0x0000 Bit Name Function 15:14 IB[1:0] 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.
Si2404 U79 GEN4 Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 Name LVCS[4:0] Type R D0 Reset settings = 0x0000 Bit Name Function 15:5 Reserved 4:0 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%).
Si2404 U7A GENA Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 Name DOP ADD Type R/W R/W D5 D4 D3 D2 D1 D0 V22HD HDLC FAST R/W R/W R/W Reset settings = 0x0000 Bit Name Function 15:8 Reserved 7 DOP Dial or Pulse. 0 = Normal ATDTW operation 1 = Use ATDTW for Pulse/Tone Dial Detection (see also ATDW command) 6 ADD Adaptive Dialing 1 = Enable 0 = Disable Attempt DTMF dial, then fall back to pulse dialing if unsuccessful. First digit is dialed as DTMF.
Si2404 U7C GENC Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Name RIGPO RIGPOEN Type R R/W Reset settings = 0x0000 Bit Name 15:5 Reserved 4 RIGPO 3:1 Reserved 0 Function Reads returns to zero. RI RI (Pin 17), follows this bit when RIGPIOEN = 1b. Reads returns to zero. RIGPOEN 0 = RI indicates valid ring signal. (Normal ring-indicator mode) 1 = RI (Pin 17) can be used as a general purpose output and follows U7C[4] (RIGPO).
Si2404 U87 SAM Bit D15 D14 D13 D12 D11 D10 D9 D8 Name MINT SERM FSMS Type R/W R/W D7 D6 D5 D4 D3 D2 D1 D0 XMTT[7:0] R/W R/W Reset settings = 0x0000 Bit Name 15:11 Reserved 10 MINT Minimal Transparency 0 = Generates two-byte transparency sequences. This option will use codes through , if possible, for received data containing two back-to-back bytes requiring transparency. 1 = Generates one-byte transparency sequences.
Si2404 Parallel Interface Registers Parallel Interface 0 (0x00) Bit D7 D6 D5 D4 D3 Name TX/RX[7:0] Type R/W D2 D1 D0 Reset settings = 0x00 Bit 7:0 Name Function 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. Rev. 0.
Si2404 Parallel Interface 1 (0x01) Bit D7 D6 D5 D4 D3 D2 D1 D0 Name RXF TXE REM INTM INT ESC RTS CTS Type R R R R/W R R/W R/W R Reset settings = 0110_0011 Bit Name Function 7 RXF 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.
Si2404 Pin Descriptions: Si2404 Si2404 CLKIN/XTALI 1 24 SDO/EECLK/D5 XTALO 2 23 DCD/D4 CLKOUT/EECS/A0 3 22 ESC/D3 FSYNC/D6 4 21 VD3.3 VD3.3 5 GND GND 6 20 19 VDA 7 18 SDI/EESD/D2 VDB RTS/D7 8 17 RI/D1 RXD/RD 9 16 INT/DO TXD/WR 10 15 AOUT/INT CTS/CS 11 14 C1A RESET 12 13 C2A Table 17. Si2404 Pin Descriptions Pin # Pin Name Description 1 CLKIN/XTALI Clock Input/Crystal Oscillator Pin. This pin provides support for parallel-resonant, AT cut crystals.
Si2404 Table 17. Si2404 Pin Descriptions (Continued) Pin # Pin Name Description 9 RXD/RD Receive Data/Read Enable. Data output to DTE RXD pin in serial mode. Active low read enable pin in parallel mode. 10 TXD/WR Transmit Data/Write Enable. Data input from DTE TXD pin in serial mode. Active low write enable pin in parallel mode. 11 CTS/CS Clear-to-Send/Chip Select. Active low clear-to-send (for flow control) in serial mode. Active low chip select in parallel mode. 12 RESET Reset Input.
Si2404 Pin Descriptions: Si3010 Si3010 QE DCT RX IB C1B C2B VREG RNG1 1 2 3 4 5 6 7 8 16 15 DCT2 14 13 DCT3 QB 12 11 QE2 10 9 VREG2 RNG2 IGND SC Table 18. Si3010 Pin Descriptions Pin # 1 Pin Name QE 2 DCT 3 RX 4 IB 5 C1B 6 C2B 7 VREG 8 RNG1 9 RNG2 10 VREG2 11 SC 12 QE2 13 QB 14 DCT3 15 IGND 16 DCT2 Description Transistor Emitter. Connects to the emitter of Q3. DC Termination. Provides dc termination to the telephone network. Receive Input.
Si2404 Ordering Guide 64 Chipset Description Digital Line Temperature Si2404 Commercial lead-free Si2404 Si3010-FS 0 to 70 °C Rev. 0.
Si2404 Package Outline: 24-Pin TSSOP Figure 7 illustrates the package details for the Si2404. Table 19 lists the values for the dimensions shown in the illustration. ddd C B A B (2x) E H θ L bbb C B A B A D A e C A1 γ C Approximate device weight is 115.7 mg. Figure 7. 24-Pin Thin Shrink Small Outline Package (TSSOP) Table 19. Package Diagram Dimensions Millimeters Symbol Min Max Typical* A — 1.20 3 A1 0.05 0.15 3 B 0.19 0.30 C 0.09 0.20 D 7.70 7.90 E 4.30 4.50 e 0.
Si2404 Package Outline: 16-Pin SOIC Figure 8 illustrates the package details for the Si3010. Table 20 lists the values for the dimensions shown in the illustration. 16 9 h E H θ 1 8 B L Detail F D C A A1 e See Detail F Seating Plane γ Figure 8. 16-pin Small Outline Integrated Circuit (SOIC) Package Table 20. Package Diagram Dimensions A Millimeters Min Max 1.35 1.75 A1 .10 .25 B .33 .51 Symbol C .19 .25 D 9.80 10.00 E 3.80 4.00 e Typical* 3 3 3 1.27 BSC H 5.80 6.
Si2404 Document Change List Revision 0.9 to Revision 0.91 Table 6, “Switching Characteristics,” on page 7: Updated CLKOUT frequency specification Updated "Bill of Materials: Si2404 Chipset" on page 11. Added Table 8 on page 14. Updated the following functional descriptions: "Serial Interface" on page 14. "Clocking/Low Power Modes" on page 15. "Parallel Phone Detection" on page 16. Added Figure 5, “Loop Voltage,” on page 16. Added Figure 6, “Loop Current,” on page 17.
Si2404 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: productinfo@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.
