SCXV.92/V.34/V.32bis Modem Controller-based Modem with Worldwide SmartDAA 3 Line Side Device for Embedded Applications Overview Applications The Conexant SCXV.92, SCXV.34, and SCXV.32bis modems are worldwide operational modem device sets for embedded applications that support modulations up to V.92, V.34, and V.32bis, respectively. All modems also support V.44/V.42bis/MNP 5 data compression for greater data throughput, V.42 LAPM/MNP2-4 error correction protocol for increased data integrity and reliability. The SCXV.92/V.34/V.32bis device set consists of a modem device and a SmartDAA 3 Line Side Device (LSD). The modem device integrates a microcontroller (MCU), a digital signal processor (DSP), and a SmartDAA system side device (SSD) onto a single die (Figure 1). The modem is available in 28-pin or 38-pin TSSOP versions. The 28-pin version is for serial interface applications (Figure 2) and is footprint-compatible with the CX84100 (SCXV.22bis) and CX81801-9x (SmartV.XX) modem devices. The 38-pin version is for serial (Figure 3) or parallel (Figure 4) interface applications (interface type selectable by an I/O pin). Major hardware interfaces are illustrated in Figure 1. Conexant’s SmartDAA technology used in the SmartDAA 3 LSD eliminates the need for bulky analog transformers, relays, and opto-isolators typically used in discrete DAA implementations. The SmartDAA 3 LSD operates without drawing power from the phone line, unlike line-powered DAAs, and is therefore not subject to variations in line voltage conditions. The SmartDAA 3 LSD also adds enhanced telephony extension features to the modem’s operation and other functions such as Call Waiting detection, and Caller ID decoding. Incorporating Conexant’s proprietary Digital Isolation Barrier (DIB) design and other innovative DAA features, the SmartDAA architecture simplifies application design and minimizes layout area to reduce design cost. The SmartDAA 3 LSD is available in a 28-pin Quad Flat No-lead (QFN) package or in a 32-pin Low Profile Quad Pack (LQFP) package. The modem operates by executing masked code from internal ROM. The modem features internal RAM memory that enhances the modem's flexibility. The modem's internal RAM can be used to load new country profiles, override existing country profiles or add customized firmware code. An optional external serial NVRAM is supported by the 38-pin version. The optional external NVRAM adds the convenience of permanent storage, just like internal RAM, NVRAM can be used to store new country profiles, override existing ones or add customized firmware code. Small, low-profile packages, reduced voltage operation, and low power consumption make this device set an ideal solution for embedded applications. • • • • • • Set top boxes Point-of-Sale terminals ATM machines Metering terminals Video game consoles Internet appliances Features • Modulations and protocols − ITU-T V.92 ♦ Modem-on-Hold (MOH) ♦ Quick connect (QC) ♦ PCM upstream − V.90/V.34/V.32bis/V.32 − V.22bis/V.22/V.23/V.21 − V.23 reverse, V.23 half-duplex − Bell 212A/Bell 103 − V.29 FastPOS − V22bis fast connect − V.80 Synchronous Access Mode • Data compression − V.44/V.42bis/MNP5 • Error correction − V.42/MNP 4/MNP 2 • Call Waiting (CW) detection • Type I and Type II Caller ID (CID) decoding • DTE/host interface − Serial DTE interface − Parallel 16550 UARTcompatible host interface (38-pin version) − Direct Mode − Synchronous Mode − Asynchronous Mode (Continued on Page 2) Product Preview Conexant Doc. No. 102235C February 19, 2004 SCXV.92/V.34/V.32bis Modem Product Preview Features (Continued) • No external memory required • Embedded and upgradeable country profiles • Serial NVRAM interface for optional permanent country profile storage (38-pin version) • Embedded AT commands • Full-duplex 8-bit/14-bit PCM voice pass-through mode • SmartDAA − Extension pick up detection − Digital line protection − Line reversal detection − Line-in-use detection − Remote hang-up detection − Worldwide compliance • Selectable 28.224 MHz or 27.000 MHz frequency of operation • Low power and voltage − Single +3.3V supply − Low power consumption mode − +3.3V I/O level • Compact, robust board design − Small, low-profile modem packages − SmartDAA and DIB technologies − Reference design supports 5KV isolation Figure 1. SCXV.92/V.34/V.32bis Modem Simplified Interface V.92/V.34/V.32bis Modem 28-Pin or 38-Pin TSSOP Serial or Parallel* Interface 28.224 MHz or 27.000 MHz Clock Source DTE/Host Interface RAM MCU/DSP/ SmartDAA Interface Digital Isolation Barrier (DIB) Components DAA Hardware CX20493 SmartDAA 3 Line Side Device (LSD) 28-Pin QFN or 32-Pin LQFP Line Side DIB Interface (LSDI) Codec Telephone Line Interface External Discrete Components Telephone Line TIP RING ROM Optional NVRAM* * 38-pin version only. 102387_001 2 Conexant 102235C SCXV.92/V.34/V.32bis Modem Product Preview Figure 2. CX86500 Modem 28-Pin TSSOP with Serial Interface Hardware Signals CRYSTAL CIRCUIT SOURCE 1 2 1M XTLI XTLO 33 28.224 MHZ CRYSTAL 33 pF 33 pF PWRCLKP PWRCLKN DIB_DATAP DIB_DATAN ALTERNATIVE CLOCK SOURCE 28.224 MHZ OR 27.000 MHZ CLOCK OSCILLATOR NC 1 2 5 4 11 18 12 10 6 8 17 SERIAL HOST INTERFACE 15 FREQUENCY SELECT CIRCUIT 3 RESET CIRCUIT 240K +3.3V 23 CX86500 Modem XTLI XTLO DSPKOUT VDD_CORE 28-Pin TSSOP Serial Interface TXD# RXD# CTS# RI# DTR# RTS# RXCLK# TXCLK# RLSD# VDD VDD GND GND RESERVED RESERVED RESERVED RESERVED 26 27 20 21 28 DIGITAL ISOLATION BARRIER (DIB) SPEAKER CIRCUIT 24 7 22 +3.3V 9 25 13 14 16 19 SCLKSEL# RESET# LPO 102287_002 102235C Conexant 3 SCXV.92/V.34/V.32bis Modem Product Preview Figure 3. CX86500 Modem 38-Pin TSSOP with Serial Interface Hardware Signals CRYSTAL CIRCUIT SOURCE 3 4 1M XTLI XTLO 33 28.224 MHZ CRYSTAL 33 pF PWRCLKP PWRCLKN DIB_DATAP DIB_DATAN 33 pF DSPKOUT NVMDATA NVMCLK/PARIF ALTERNATIVE CLOCK SOURCE 28.224 MHZ OR 27.000 MHZ CLOCK OSCILLATOR NC 3 4 7 6 16 23 17 15 27 8 12 22 SERIAL HOST INTERFACE FREQUENCY SELECT CIRCUIT 20 5 RESET CIRCUIT 240K +3.3V 31 34 35 25 26 DIGITAL ISOLATION BARRIER (DIB) 36 SPEAKER CIRCUIT 29 13 SERIAL EEPROM 10K XTLI XTLO CX86500 Modem VDD_CORE 38-Pin TSSOP Serial Interface TXD# RXD# CTS# RI# DTR# RTS# DSR# RXCLK# TXCLK# RLSD#/CLKSEL# VDD VDD VDD GND GND GND GND NC NC RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED SCLKSEL# RESET# LPO 32 9 10 30 +3.3V 1 14 33 38 2 37 NC 11 18 19 21 28 24 102287_004 4 Conexant 102235C SCXV.92/V.34/V.32bis Modem Product Preview Figure 4. CX86500 Modem 38-Pin TSSOP with Parallel Interface Hardware Signals CRYSTAL CIRCUIT SOURCE 3 4 1M XTLI XTLO 33 28.224 MHZ CRYSTAL 33 pF PWRCLKP PWRCLKN DIB_DATAP DIB_DATAN 33 pF DSPKOUT NVMDATA NVMCLK/PARIF ALTERNATIVE CLOCK SOURCE 28.224 MHZ OR 27.000 MHZ CLOCK OSCILLATOR NC 6 7 8 12 15 16 17 22 23 27 28 18 21 20 19 PARALLEL HOST INTERFACE FREQUENCY SELECT CIRCUIT 11 5 RESET CIRCUIT 240K +3.3V 3 4 31 DIGITAL ISOLATION BARRIER (DIB) 36 SPEAKER CIRCUIT 29 13 SERIAL EEPROM CX86500 Modem XTLI XTLO HA0 HA1 HA2 HD0 HD1 HD2 HD3 HD4 HD5 HD6 HD7 HCS# HRD# HWT# HINT 34 35 25 26 38-Pin TSSOPVDD_CORE Parallel VDD Interface VDD VDD GND GND GND GND NC NC RESERVED PCLKSEL# 32 9 10 30 +3.3V 1 14 33 38 2 37 NC 24 RESET# LPO 102287_006 102235C Conexant 5 2003, 2004 Conexant Systems, Inc. All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. (“Conexant”) products. 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