SI2400-KS Silicon Laboratories Inc, SI2400-KS Datasheet
SI2400-KS
Specifications of SI2400-KS
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SI2400-KS Summary of contents
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... DSP data pump, modem controller, analog front end (AFE), isolation transformer, relays, opto-isolators 4-wire hybrid, and voice codec. The Si2400 is ideal for embedded modem applications due to its small board space, low power consumption, and global compliance. Functional Block Diagram ...
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... Si2400 2 Rev. 1.3 ...
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... DSP Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 7.2. Call Progress Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Appendix A—DAA Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Appendix B—Typical Modem Applications Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . .84 Appendix C—UL1950 3rd Edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 9. Pin Descriptions: Si2400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 10. Pin Descriptions: Si3015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88 11. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 12. Package Outline: 16-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94 Rev ...
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... The digital supply can operate from either 3 5.0 V. The Si2400 interface supports 3.3 V logic when operating D from 3.3 V. The 3.3 V operation applies to both the serial port and the digital signals CTS, CLKOUT, GPIO1–4, and RESET. ...
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... R25 and R26 installed. 3. The ring signal is guaranteed to not be detected below the minimum. The ring signal is guaranteed to be detected above the maximum. 4. The Si2400 ring detector can be programmed to detect rings between this range. 5. C15, R14, Z2, and Z3 not installed. SF5[1] (RZ Symbol Test Condition ...
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... Power Supply Current, DSP Power Down Power Supply Current, Wake-On-Ring Power Supply Current, Total Power Down 1. Measurements are taken with inputs at rails and no loads on outputs. 2. Must be met in order to avoid putting the Si2400 into factory test mode. 3. Specifications assume SE1[7:6] (MCKR) = lower when MCKR 10 ...
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... THD ACT = 0 , DCT = 01 b (Japan THD ACT = 1 , DCT = 11 b (CTR21 > line balance minimum by placing a 20 MΩ resistor across the C9 capacitor. Rev. 1.3 Si2400 I L Min Typ Max — 9.6 — — 4.9152 — — 5 — — 5 — — 1 — 2 — 1.58 — ...
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... AIN Full Scale Level *Note: Receive full scale level will produce –0.9 dBFS at RXD. Table 7. Absolute Maximum Ratings Parameter DC Supply Voltage Input Current, Si2400 Digital Input Pins Digital Input Voltage Operating Temperature Range—B-Grade Operating Temperature Range—K-Grade Storage Temperature Range Note: Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded ...
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... Baud Rate) sbc t 10 csb t 5 — rs2 t 3 rs3 Receive Tim ing Transm it Tim ing Rev. 1.3 Si2400 Typ Max Unit — 39.3216 MHz — — ns — — ns — — ms — 100 ns — — – Stop D5 D6 ...
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... Si2400 2. Typical Application Schematic + Rev. 1.3 ...
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... BCP56, NPN 1/2 W Notes: 1. The Si2400 design survives up to 3500 V longitudinal surges without R27, R28, D3, D4, Z4, and Z5. Adding the R27, R28, D3, D4, Z4, Z5 enhanced lightning option increases longitudinal surge survival to greater than 6600 V. The isolation capacitors C1, C4, C24, and C25 must also be rated to greater than the surge voltage. Y-class capacitors are recommended for highest surge survival and are required for Norway, Sweden, Denmark, and Finland. 2. For FCC-only designs: C14, C38, C39, R12, R13, R31, and R32 are not required ...
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... Zener Diode, 5.6 V, 1/2 W Notes: 1. The Si2400 design survives up to 3500 V longitudinal surges without R27, R28, D3, D4, Z4, and Z5. Adding the R27, R28, D3, D4, Z4, Z5 enhanced lightning option increases longitudinal surge survival to greater than 6600 V. The isolation capacitors C1, C4, C24, and C25 must also be rated to greater than the surge voltage. Y-class capacitors are recommended for highest surge survival and are required for Norway, Sweden, Denmark, and Finland. 2. For FCC-only designs: C14, C38, C39, R12, R13, R31, and R32 are not required ...
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... Analog Input/Output Figure 4 illustrates an optional application circuit to support the analog output capability of the Si2400 for voice monitoring purposes OUT Figure 4. Optional Connection to AOUT for a Monitoring Speaker ‘ Table 9. Component Values—Optional Connection to AOUT Analog Input + – Symbol Value C2, C3, C5 0.1 µ ±20% C4 100 µ ...
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... In order to support overspeeding by the remote modem, the Si2400 DTE speed must be greater than the modem (line) data rate. 2. The Si2400 only adjusts its DCE rate from 2400 bps to 1200 bps connecting to a V.22-only (1200 bps only) modem. Because the V.22bis specification does not outline a fallback procedure, the host should implement a fallback mechanism consisting of hanging up and connecting at a lower baud rate ...
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... V.23 (1200 tx, 75 rx) V.23 (75 tx, 1200 rx) V.23 (600 tx, 75 rx) V.23 (75 tx, 600 rx) 5.2. Configurations and Data Rates The Si2400 can be configured to any of the Bell and with standard CCITT operation modes in Table 12. The modem, when configured for V.22bis, will connect at 1200 bps if the far end modem is configured for V ...
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... LSB first at the DTE rate determined by the S-Register SE0[2:0] (SD) setting and terminates with a stop bit. After the middle of the stop bit time the Si2400 will begin looking for a logic 1 to logic 0 transition signaling the start of the next character on TXD to be sent to the line (remote modem) ...
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... However, no modem modes or tone detection features will function. Wake-Up-On-Ring. By issuing the ATz command, the Si2400 goes into a low power mode where both the microcontroller and DSP are powered down. Only an incoming ring or a total reset will power up the chip again. Return from wake-on-ring will trigger the ALERT pin if S62[4] (WOR Table 13 ...
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... Si2400 5.5. Parallel Phone Detection The Si2400 has the ability to detect a phone or other device that is off hook on a shared line. This enables the ISOmodem to avoid interrupting a call in progress on a shared line and to intelligently handle an interruption by another device when the Si2400 is using the line. An ...
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... LVCS directly prior to going off-hook. 5.5.3. Off-Hook Intrusion Detection When the Si2400 is off-hook, it can detect another phone going off-hook by monitoring the dc loop current. The loop current sense transfer function is shown in Figure 8 with the upper curve representing CTR21 ...
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... S12[4:0] (ACL) is used to avoid this problem. Prior to going off-hook, the host can set the ACL register to a known value of LVCS with the Si2400 off-hook and all parallel phones or other devices on-hook. If this value is not known, such as on the first off-hook event using this specific phone line, ACL should be set to 0, indicating no known LVCS reference ...
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... V Zener protection device will begin to conduct and could be damaged if the power is applied for too long. The Si2400 will detect the value of the loop current at a programmable time set by S32 (OCDT) after going off- hook (default = 20 ms). If the loop current is too high, an “ ...
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... Si2400 hangs up and echoes an “H”. Otherwise, after 40 1s (marks) have been detected, the Si2400 will search for a start bit, echo an “m” for mark, and begin assembling characters and transmitting them out through the serial port. When the ...
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... Note: Baud rates (programmed through register SEO) can be set to the following: 228613, 245760 and 307200. 5.11. PCM Data Mode The Si2400 has the ability to bypass the modem algorithm and send 14-bit PCM data, sampled at 9600 Hz, across the DAA. To use this mode ...
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... AIN (Call Progress) Voice Mode (DRT = 01b) Si2400 AOUT AIN (Voice Out) (Voice In) Loopback Mode (DRT = 10b) Si2400 AOUT AIN Codec Mode (DRT = 11b) Si2400 AOUT AIN (Voice Out) (Voice In) Figure 10. Signal Routing Rev. 1.3 Si3015 RJ11 RJ11 Si3015 RJ11 RJ11 ...
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... TIES, or ninth bit escape) to the master modem. (Note that the host can initiate a turnaround only if the Si2400 is the master.) The host then sends the ATRO command to the Si2400 to initiate a V.23 turnaround and to go back to the online (data) mode. ...
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... When the Si2400 is ready to send the next byte has not yet received any data from the host, it will recognize this as an end-of-frame, raise CTS, calculate the final CRC code, transmit the code, and begin transmitting stop flags. ...
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... When the “G”, “e”, or “A” (referred frame result word) is sent, the Si2400 raises the EOFR (end of frame receive) pin (see Figure 10B). The GPIO1 pin must be configured as EOFR by setting SE4[3] (GPE) = ...
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... Either a 4.9152 MHz clock on XTALI or a 4.9152 MHz crystal across XTALI and XTALO form the master clock for the Si2400. This clock source is sent to an internal phase-locked loop (PLL) which generates all necessary internal system clocks ...
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... The following section describes the AT command set available in the Command mode. The Si2400 supports a subset of the typical modem AT command set since it is intended for use with a dedicated microcontroller instead of general terminal applications. AT commands begin with the letters AT and are followed directly (no space) by the command ...
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... In the above example, the Si2400 dials the first digit “1” using DTMF dialing. The “,” is used to pause in order to ensure that the central office has had time to accept the DTMF digit “ ...
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... PC screen are actually transmitted to the modem as the hexadecimal equivalents of each character. Likewise, the value N stored in S-register R is read back to the terminal with the ATSR? command as two hexadecimal characters. For example, read the value of S35 after the Si2400 has been reset. after a b Terminal Entry ATS35?< ...
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... Si2400 will maintain its current DTE settings, GPIO definitions, tone detect and transmit settings, and overload and billing tone detection status. The hardware reset pin, RESET (Si2400, pin 8), is used to reset the Display Si2400 to factory default settings. If other commands (hex) ...
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... Any received character is echoed. User- defined tones are echoed as X and Y. Transmission of any data to the Si2400 UART will cause the modem to go into the command mode. The modem can then send DTMF tones via the “ATDT #!0” command (where # represents a DTMF character 0-9, A- disconnected with the “ ...
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... The previous message can be resent if the host responds with a “~” after the Si2400 echoes a “K”. Any character other than a “!” “~” sent to the modem immediately after the “K” will cause the modem to escape to the command mode and remain off-hook. Any character except “ ...
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... Reconfigured from SKDTL in !7 mode. Pulse off time. Pulse on time. Intermessage delay and Kissoff timeout. Interdigit timing. Only used in !7 mode. Delay before data. Data carrier frequency. Handshake minimum tone. Handshake frequency. Reconfigured from CDT in !7 mode to handshake tone timeout. Rev. 1.3 Si2400 35 ...
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... If the intermessage timing is relative to the end of the previous message (S36[3:2] [IDKT intermessage timer begins with the “,” result code. The Si2400 sends an “N” to mark the time in which the intermessage timer has timed out. If another message is received prior to the “N”, the Si2400 keeps the message and sends it to the receiver at the time the “ ...
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... S1C (DTT). Once the dial tone is detected, dialing will commence dial tone is not detected within the time programmed in S02 (CW), the Si2400 will hangup and echo an “N” to the user. 2. Busy / Ringback Tone. After dialing has completed, the Si2400 monitors for Busy/Ringback and modem answer tones ...
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... Read Only Definition) can be monitored, along with TONE, to detect energy at these user- defined frequencies. The default trip-threshold for UDFD1–4 is –34 dBm but can be modified with the DSP register UDFSL. Table 22. Si2400 Global Ringer and Busy Tone Cadence Settings Country Australia Austria Belgium ...
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... Once the host has detected an answer tone using manual call progress, the host should immediately execute the “ATDT” command in order to make a connection. This will cause the Si2400 to search for the modem answer tone and begin the correct connect sequence. In manual call progress, the DSP can be programmed to detect specific tones ...
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... SE5 and SE6 depending on whether they are being written to or read from. Care must be exercised when writing to DSP registers. DSP registers can only be written while the Si2400 is on- hook and in the Command mode. Writing to any register address not listed in Tables 24 and 25 or writing out-of- range values is likely to cause the DSP to exhibit unpredictable behavior ...
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... Level = 20log 43 dBm Level = 20log 45.5 dBm Level = 10log 43 dBm Level = 10log 45.5 dBm SE6 Description Name DADL DDL DSP1 DSP2 Rev. 1.3 Si2400 Function Default (dec) (UDFSL/ 4096 10 (2620/CONL) – 2620 10 (3300/COFL) – 3300 10 (AONL/107) – (AOFL/58) – ...
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... Si2400 7.2. Call Progress Filters The programmable call progress filter coefficients are located in DSP address locations 0x0010 through 0x0023. There are two independent 4th order filters A and B, each consisting of two biquads, for a total of 20 coefficients. Coefficients are 14 bits (–8192 to 8191) and are interpreted as, for example value/4096, thus giving a floating point value of approximately – ...
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... This is a bit mapped register. 1 This is a bit mapped register. 1 This is a bit mapped register. Busy tone on. Time that the busy tone must be on (10 ms units) for busy tone detector. Rev. 1.3 Si2400 Reset 0x00 0x03 0x14 0x0E 0x30 0x18 0x24 ...
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... Si2400 Table 27. S-Register Summary (Continued) “S” Register Name Register Address (hex) S17 0x17 BTOF S18 0x18 BTOD S19 0x19 RTON S1A 0x1A RTOF S1B 0x1B RTOD S1C 0x1C DTT S1D 0x1D DTMFD DTMF detect time. The time that a DTMF tone must be valid ...
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... Handshake End to TX Data delay (10 ms units). FSK connection delay low. Amount of time delay added between end of answer tone handshake and actual modem connection for FSK modem connections (5/3 ms units). Rev. 1.3 Si2400 Reset 0x0C 0x78 0x08 , this register sets ...
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... In the !7 alarm mode, this register functions as Handshake Tone Timeout, which defines how long the Si2400 waits for a handshake prior to send- ing the “N” result code. Delay between going off-hook and answer tone generation when in answer mode (53 ...
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... This is a bit mapped register. 1 This is a bit mapped register. 1 This is a bit mapped register. 1 This is a bit mapped register. 1 This is a bit mapped register. 1 This is a bit mapped register. Rev. 1.3 Si2400 Reset 0x00 0x22 0x07 0x00 0x00 0x00 0x00 0x00 1 0x00 ...
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... Si2400 Table 28. Bit Mapped Register Summary “S” Register Register Register Address Name (hex) S07 0x07 MF1 HDEN S0C 0x0C MF2 S11 0x11 ONHI S12 0x12 OFHI S13 0x13 MF3 S14 0x14 MF4 MRCD S15 0x15 MLC ATPRE S1F 0x1F ARM3 ...
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... Bit 3 Bit 2 PDDE PDN PDL HBE FDT ARG[2:0] ARL[1:0] DCTO OHS ACT DCT[1:0] FJM DIAL LMO LIM LRV[3:0] OVL BTD Rev. 1.3 Si2400 Bit 1 Bit 0 Default Binary 0000_0000 LM OFHK 0000_0000 0001_1100 0000_0000 ATL[1:0] 0000_1111 0000_1000 RZ RT VOL FLVM 0000_0000 0001_0000 — ...
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... Si2400 S07 (MF1). Modem Functions 1 Bit Name HDEN BD V23R Type R/W R/W R/W Reset settings = 0000_0001 (0x01) b Bit Name 7 HDEN HDLC Framing Disable Enable Blind Dialing Disable Enable (Blind dialing occurs immediately after “ATDT#” command). 5 V23R V.23 Receive.* V.23 75 bps send/600 (BAUD = 0) or 1200 (BAUD = 1) bps receive. ...
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... Caller ID monitor disabled (Normal caller ID operation Caller ID monitor enabled. Si2400 must detect channel seizure signal followed by marks in order to report caller ID data Caller ID monitor enabled. Si2400 must detect a DTMF followed by marks in order to report caller ID data Caller ID monitor enabled. Si2400 must only detect marks in order to report caller ID data ...
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... Si2400 S11 (ONHI). On-Hook Intrusion Bit Name DVL Type R/W Reset settings = 0100_1000 (0x48) b Bit Name 7:5 DVL Differential Voltage Level. Differential voltage level to detect intrusion event (2.75 V units.) 4:0 AVL Absolute Voltage Level. Absolute voltage level to detect intrusion event (2.75 V units added to 3 V.) S12 (OFHI) ...
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... British Telecom Caller ID Decode Disable Enable. 1 CIDU BellCore Caller ID Decode Disable Enable. 0 PCM PCM Data Mode. DTE rate must be ≥ 228613, and flow control must be used Disable Enable OFHD ONHD CIDB CIDU R/W R/W R/W R/W Function Rev. 1.3 Si2400 D0 PCM R/W 53 ...
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... This bit is normally NOT sticky so that the user may monitor/poll for intrusion manually. However, during dialing and during data mode impossible to monitor/poll this bit. Therefore, if the Si2400 is either dialing or in data mode, this bit is sticky. If triggered dur- ing data mode, this bit will remain sticky for 800 ms after the Si2400 goes back on-hook. ...
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... BDA Bit Data bit data bit data bit data bit data. 0 NBE Ninth Bit Enable Disable Enable ninth bit as Escape and ninth bit function (register C ENGE STB BDA R/W R/W R/W Function Rev. 1.3 Si2400 D0 NBE R/W 55 ...
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... Si2400 S1F (ARM3). Alarm 3 (!7 Mode Only) Bit Name KOT Type R/W Reset settings = 0010_1101 (0x2D) b Bit Name 7:5 KOT Kissoff Timeout units. Maximum 7 s. 4:0 IMT Intermessage Timing. 500 ms units. Maximum 8 s. Note: S1F is reconfigured as Alarm 3, a bit-mapped register mode only. In all other modes, S1F is ATTD (Answer Tone to Transmit Delay) ...
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... TSAC Transmit Scrambler Active Disable Force transmit scrambler active once connected. *Note: When the Si2400 is on hook, the on-hook intrusion detector might not be immediately disabled by only setting the 1 S33[6] (DON) = (S33 = 0xCX, X indicates an otherwise appropriate value.) In order to guarantee that the result ...
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... Intermessage Delay and Kissoff Timeout. This register field defines two parameters. The Intermessage Delay defines the time the Si2400 waits prior to sending a subsequent message. The Kissoff Timeout defines the time the Si2400 waits for a Kissoff Tone prior to declaring that there is no kissoff tone detected. ...
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... Reset settings = 0011_1000 (0x38) b Bit Name 7 DBD Delay Before Data. Time the Si2400 waits prior to transmitting data, relative to the end of the handshake tone 300 ms Use S2E (RTCT) register contents. 6:5 DCF Data Carrier Frequency. Frequency that the Si2400 will use to transmit. ...
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... Name 7:3 Reserved Read returns 0. 2:0 CIDG Caller ID Gain. The Si2400 dynamically sets the On-Hook Analog Receive Gain SF4[6:4] (ARG) to CIDG during a caller ID event (or continuously if S0C[6:5] (CIDM = 11 be set prior to caller ID operation. 000 = 7 dB 001 = 6 dB 010 = 4.8 dB 011 = 3.5 dB 100 = 2.0 dB 101 = 0 dB 110 = – ...
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... No Phone Line Result Code (“L” and “l”).* 0 = Disable Enable Ring Result Code (“R”).* 0 = Disable Enable. *Note: S62[3] (FLS), S62[2] (IR), S62[1] (NLR), and S62[0] (RR) only apply if S14[7] (MRCD WOR FLS IR NLR R/W R/W R/W R/W Function Rev. 1.3 Si2400 ...
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... Si2400 S82 (IST). Intrusion Bit Name IST Type R/W Reset settings = 0000_0000 (0x00) b Bit Name 7:4 IST Intrusion Settling Time. 0000 = IST equals 1 second. Delay between when the ISOmodem goes off-hook and the off-hook intrusion algorithm begins (250 ms units). 3 LCLD Loop Current Loss Detect. ...
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... R/W R/W Function Rev. 1.3 Si2400 D0 63 ...
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... Si2400 SE1 (CLK1). Clock 1 Bit Name MCKR Type R/W Reset settings = 0000_0111 (0x07) b Bit Name 7:6 MCKR Microcontroller Clock Rate Fastest 9.8304 MHz 4.9152 MHz 2.4576 MHz Reserved. Note: MCKR must be set to 0 when the UART DTE rate is set to 228613 or greater ...
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... Digital output (relay drive; also used for CD function Analog input Reserved. 1:0 GPIO1 GPIO1 Digital input Digital output (relay drive Analog input Reserved. *Note used as analog input or GPIO pins; SE4[3] (GPE) and SE4[0] (TRSP) must both equal zero GPIO2 R/W R/W Function Rev. 1.3 Si2400 D0 GPIO1 R/W 65 ...
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... Si2400 SE3 (GPD). GPIO Data Bit Name AING Type R/W Reset settings = 0000_0000 (0x00) b Bit Name 7:6 AING AIN Gain Bits 2 5:4 Reserved Read returns zero. 3 GPD4 GPIO4 Data GPD3 GPIO3 Data GPD2 GPIO2 Data GPD1 GPIO1 Data GPD4 GPD3 GPD2 ...
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... GPE and TRSP are mutually exclusive. Only one can be set at any one time, and they override the settings in registers GPIO2 and GPIO1. Once TXD2 and RXD2 are enabled through TRSP longer function and pins TXD2 and RXD2 control the Si2400. This feature allows a second microcontroller to control the Si2400. ...
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... Si2400 SE5 (DSP1). (SE8 = 0x02) Read Only Definition Bit Name DDAV TDET Type R R Reset settings = 0000_0000 (0x00) b Bit Name 7 DDAV DSP Data Available. 6 TDET Tone Detected. Indicates a TONE (any of type 0–25 below) has been detected Not detected Detected. 5 Reserved Read returns zero. ...
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... Hz CCITT mode answer tone with phase reversal 2225 Hz Bell mode answer tone without phase reversal 2100 Hz CCITT mode answer tone without phase reversal User-defined programmable frequency tone (UFRQ) (see Table 24 on page 40, default = 1700 Hz) 1300 Hz V.25 calling tone Rev. 1.3 Si2400 D0 . See Table 23 on page 39 ...
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... Si2400 SE6 (DSP3). (SE8 = 0x02) Write Only Definition Bit Name CPSQ CPCD Type W W Reset settings = 0000_0000 (0x00) b Bit Name 7 CPSQ 0 = Disable Enables a squaring function on the output of filter B before the input to A (cascade only). 6 CPCD 0 = Call progress filter B output is input into call progress filter A. Output from fil- ter A is used in the detector ...
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... Reserved Read returns zero Hook Control/Status. OFHK LM 0 OFHK Else Reserved Notes: 1. See Register F7 on page 76 for LM0. 2. Under normal operation, the Si2400 internal microcontroller will automatically set these bits appropriately R/W Function 1,2 LM0 Line Status Mode 0 1 On-hook 1 1 ...
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... When the Si3015 detects a billing tone, SF9[3] (BTD) is set Disable Enable. 6 PDN Power Down Normal operation Powers down the Si2400. 5 PDL Power Down Line-Side Chip (typically only used for board level debug Normal operation. Program the clock generator before clearing this bit Places the Si3015 in lower power mode. 4:3 ...
Page 73
... Bit Name 7 SQLH Ring Squelch. If the host implements a manual ring detect (bypassing the Si2400 micro), this bit must be set, then cleared following a polarity reversal detection. Used to quickly recover offset on RNG1/2 pins after polarity reversal Normal Squelch. 6:4 ARG Analog Receive Gain. ...
Page 74
... OHS On-Hook Speed (See Table 13 and “Appendix A—DAA Operation”). 0 = The Si2400 will execute a fast on-hook The Si2400 will execute a slow, controlled on-hook. 4 ACT AC Termination (See Table 13 and “Appendix A—DAA Operation”). 0 = Real impedance. ...
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... Decreases dc termination voltage. 0 FLVM Force Low Voltage Mode. When SF5[3:2] (DCT (see DCT = 00) while allowing for a transmit level of –1 dBm Disable Enable FJM DIAL VOL R/W R/W Function (FCC mode), setting FLVM will force the Low Voltage mode b Rev. 1.3 Si2400 D0 FLVM R/W 75 ...
Page 76
... Si2400 SF7 (DAA7). DAA Low Level Functions 7 Bit Name Type Reset settings = 0001_0000 (0x10) b Bit Name 7:5 Reserved Read returns zero. 4 LM0 See LM0 in Register F0 page 71 LIM Current-Limiting Adjust Value Disable Enable (CTR21 mode). 2:0 Reserved Read returns zero. SF8 (DAA8). DAA Low Level Functions 8 ...
Page 77
... Billing Tone Detect (sticky). (See “Appendix A—DAA Operation”.) billing tone detected Billing tone detected. 2 Reserved Read returns zero. 1 ROV Receive Overload (sticky) (see “Appendix A—DAA Operation”). excessive level detected Excessive input level detected. 0 Reserved Read returns zero BTD ROV R R Function Rev. 1.3 Si2400 D0 77 ...
Page 78
... Also, under some layout conditions, C22 and C30 may improve the immunity to telephone line transients. This is most important for applications that use the voice codec feature of the Si2400. Because line transients are infrequent and high voltage in nature, they tend to be more problematic in voice applications than in data applications ...
Page 79
... Loop Current (A ) Figure 16. Japan Mode I/V Characteristics Low Voltage mode (DCT = 00 the lowest line voltage mode supported on the Si2400, with a transmit full scale level of –5 dBm. Higher transmit levels for DTMF dialing are also supported. See “DTMF Dialing”. This low voltage mode is offered for situations that require very low line voltage operation ...
Page 80
... ACT = 0 b satisfies the impedance requirements of FCC part 68, JATE, and other countries. This real impedance is set by circuitry internal to the Si2400 chipset as well as the resistor R2 connected to the Si3015 REXT pin. ACT = complex impedance which satisfies the b ...
Page 81
... ±10% C1,C2 0.01 μ F, 250 V, ±10% C3 3.3 mH, >120 mA, <10 Ω , ±10 mH, >40 mA, <10 Ω , ±10 0.027 0.027 3.3 mH, 120 mA TIP 3.3 mH From Line 0.01 RING Figure 19. Dongle Applications Circuit Rev. 1.3 Si2400 L4 To DAA C3 Value L4 To Si3015 Chipset C3 F, 250 V 81 ...
Page 82
... The CLKOUT pin of the Si2400 can be used as an initial indication that the Si2400 is functional. Upon power up and the negation of the reset pin, the CLKOUT pin oscillates at 9 ...
Page 83
... If 1, QAM algorithm is chosen bit 3 : orig/nans selects between originate mode and answer mode answer mode If 1, originate mode bit 4 : When set, enables 550 Hz guard tone bit 5 : When set, enables 1800 Hz guard tone ATSE6=00 // sending unscrambled zeros ATSE6=FF // sending scarmbled ones Rev. 1.3 Si2400 83 ...
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... ATS07=00 (set for DPSK 1200 bps) 4. ATSF5=06(set DAA for South Korea) 5. ATS13=80 (set caller ID to Japanese format) When caller ID data is detected, Si2400 will echo “f” indicating the line reversal, “m” indicating the mark, and then caller ID data will follow. ...
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... A C—UL1950 3 PPENDIX Designs using the Si2400 pass all overcurrent and overvoltage tests for UL1950 3rd Edition compliance with a couple of considerations. Figure 20 shows the designs that can pass the UL1950 overvoltage tests, as well as electromagnetic emissions. The top schematic of Figure 20 shows the configuration in which the ferrite beads (FB1, FB2) are on the unprotected side of the sidactor (RV1) ...
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... Transmit Data. Serial communication data to the Si2400. 7 CTS Clear to Send. Clear to send output used by the Si2400 to signal that the device is ready to receive more digital data on the TXD pin. 8 RESET Reset Input. An active low input that is used to reset all control registers to a defined, initialized state ...
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... This pin can be either a GPIO pin (analog in, digital in, digital out) or the RXD2 pin. Default is digital. The user can program this pin to function as RXD2 if the secondary serial interface is enabled. This pin can also be programmed to function as the EOFR (end of frame receive) signal for HDLC framing. Description Rev. 1.3 Si2400 87 ...
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... Connects through a capacitor to the TIP lead of the telephone line. Provides the ring and caller ID signals to the Si2400. 6 RNG2 Ring 2. Connects through a capacitor to the RING lead of the telephone line. Provides the ring and caller ID signals to the Si2400 Transistor Base. Connects to the base of transistor Q3 Transistor Emitter ...
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... Table 30. 3015 Pin Descriptions (Continued) Pin # Pin Name 14 RX Receive Input. Serves as the receive side input from the telephone network. 15 FILT Filter. Provides filtering for the dc termination circuits. 16 FILT2 Filter 2. Provides filtering for the bias circuits. Description Rev. 1.3 Si2400 89 ...
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... Si2400 11. Ordering Guide Chipset Region Si2400 Global Si2400 Global Si2400 Global 90 System-Side Line-Side Pb-Free Si2400-KS Si3015-KS Si2400-BS Si3015-BS Si2400-FS Si3015-F-FS Rev. 1.3 Temp. Range °C No – °C Yes °C ...
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... Package Outline: 16-Pin SOIC Figure 21 illustrates the package details for the Si2400 and Si3015. Table 31 lists the values for the dimensions shown in the illustration aaa - Seating Plane Figure 21. 16-pin Small Outline Integrated Circuit (SOIC) Package Table 31. Package Diagram Dimensions E H bbb ...
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... Si2400 OCUMENT HANGE IST Revision 1.1 to Revision 1.2 Table 3 on page 6, GPIO1– mA. Table 4 on page 6, GPIO1– mA. Table 5 on page 7, Caller ID Common Mode Tolerance added. Updated !7, !1 description of page 34. Added "Compliance Test Commands" on page 83. Register S33 (MDMO)., “Modem Override,” on page 57, bit 0 (TSAL) definition corrected. Updated " ...
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... N : OTES Rev. 1.3 Si2400 93 ...
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... Si2400 C I ONTACT NFORMATION 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. ...