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RC56LD Datasheet(PDF) 8 Page - Synaptics Incorporated. |
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RC56LD Datasheet(HTML) 8 Page - Synaptics Incorporated. |
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8 / 22 page  5&/'5&/'DQG5&/' ,QWHJUDWHG9 .IOH[99ELV0RGHP'HYLFH6HWV 8 Conexant MD213 150 MHz Pentium or equivalent. The V.70 software drivers require about 10% of the MIPS available in a Pentium 150 MHz class PC. The host PC must supply full- duplex sound support, typically to a microphone/speaker, such as provided by Conexant WaveArtist devices or a sound card. The modem is configured for host-based V.70 via AT commands, and, when using a TAPI-compliant communication application, the V.70 software drivers will automatically run upon a successful V.70 connection. Sleep Mode Sleep Mode is supported in the modem device set and the RCDSVD SCP device. GSM (Parallel Host or PC Card Interface) GSM operation requires installation of 4M (RC56) or 2M (RC336 or RC144) ROM. On-board DSVD is not available when the 4M ROM is installed because MCU port PB5 is used for address line A18 output rather than RCDSVD SCP chip select output (~SVDSEL). Features supported in GSM operation include: • Data modem − V.21, V.23, V.22, V.22 bis, V.32 − ISDN interoperability: 300 bps to 9600 bps • Transparent asynchronous mode up to 9600 bps • Non-transparent mode (RLP) up to 9600 bps • Fax modem send and receive rate up to 9600 bps • AT GSM commands (ETSI 07.07) • GSM direct connect • Firmware interface for OEM-provided phone driver • Automatic GSM cable presence detection • Built-in parallel host (16550A UART) interface Modem Data Pump (MDP) The data/fax/voice/speakerphone modem data pump (MDP) is a Conexant R6785 packaged in a 144-pin TQFP or a R6764 packaged in a 100-pin PQFP. The input clock frequency is 28.224 MHz and is supplied by the MCU. An internal phase locked loop (PLL) circuit supports 56.448 MHz internal operation. The operating voltage is +3.3V supplied by the MCU with +5V tolerant inputs. The R6785 supports either +3.3V (~SET3V is tied to AGND) or +5V (~SET3V pin is NC) analog signal interface; the R6764 supports +3.3V analog signal interface. In V.90/K56flex data modem mode (RC56), the MDP can receive data from a digital source using a V.90- or K56flex-compatible central site modem at line speeds up to 56 kbps. Asymmetrical data transmission supports sending data at speeds up to V.34 rates. In V.34 data modem mode (RC56 and RC335), the MDP can operate in 2-wire, full-duplex, synchronous/asynchronous modes at line rates up to 33.6 kbps. Using V.34 modulation to optimize modem configuration for line conditions, the MDP can connect at the highest data rate that the channel can support from 33.6 kbps to 300 bps with automatic fallback. Automode operation in V.34 is provided in accordance with PN3320 and in V.32 bis in accordance with PN2330. In V.32 bis mode, the MDP can operate at line speeds up to 14.4 kbps. In fax modem mode, the MDP supports Group 3 facsimile send and receive speeds of speeds of 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, and 2400 bps. ADPCM voice processing is supported. Downloading of MDP code from the MCU is supported. Microcontroller (MCU/MCUP) The MCU/MCUP is a Conexant 8-bit microcomputer with pins to support serial DTE/parallel host bus/PC Card, MDP, voice/TAM, speakerphone, and RCDSVD SCP interface operation, depending upon model and installed firmware. The operating voltage is +3.3V with +5V tolerant inputs. The MCU connects to the DTE/host via a V.24 (EIA/TIA- 232-E) serial DTE interface or a parallel host bus depending on installed MCU firmware, whereas the MCUP connects to a PC Card socket via built-in PC Card interface. Unless otherwise stated, references to general MCU functions also include the MCUP. The MCU performs the command processing and host interface functions. The crystal frequency is 28.224 MHz. The MCU outputs a 28.224 MHz clock to the MDP eliminating need for a separate MDP crystal circuit. The MCU connects to the MDP via dedicated lines and the external bus. The external bus also connects to OEM- supplied RAM (if more than 32 kbytes are required), OEM- supplied ROM/flash ROM, and to the optional RCDSVD SCP. The MCU/MCUP provides 32 kbytes of internal RAM that can be used instead of external RAM for 32-kbyte RAM applications. The MCU connects to an optional 256-byte or 2048-byte serial EEPROM over a dedicated serial interface. The MCU and MCUP are both packaged in a 128-pin TQFP. MCU Serial DTE or Parallel Host Interface The MCU connects to the DTE/host via a V.24 (EIA/TIA- 232-E) serial DTE interface or a parallel host bus depending on installed MCU firmware. In parallel host interface, the MCU can also connect to a PC Card connector using a Conexant PCMCIA Interface Control Adapter (PICA) device (see data sheet Order No. MD99) and a PCMCIA Card Information Structure (CIS) memory device. MCUP PC Card Interface The MCUP incorporates a built-in PC Card interface and CIS memory allowing the MCUP to directly connect to the PC Card 68-pin socket without requiring external PICA and CIS devices. Two independent functions are supported, the modem function and an optional user-defined Function 2. A Card Option Configuration Register and a Configuration and Status Register for each function allow independent configuration/control and status reporting of the respective function. |
Similar Part No. - RC56LD |
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Similar Description - RC56LD |
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