 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SI2493D Datasheet(PDF) 18 Page - Silicon Laboratories |
|
||||||||||||||||||||||||||||||
SI2493D Datasheet(HTML) 18 Page - Silicon Laboratories |
|
|
18 / 60 page  Si2493 18 Rev. 1.31 4. Functional Description Figure 8. Functional Block Diagram The Si2493 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. The Si2493 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 Si2493 features a complete set of modem protocols including all ITU-T standard formats up to V.92. To provide the most flexibility, the Si2493 ISOmodem system-side device is offered in either a 24-pin 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 Si2493 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 Si2493 solution includes a silicon DAA using Silicon Laboratories’ proprietary third- generation DAA technology. This highly-integrated DAA can be programmed to meet worldwide PTT specifications for ac termination, dc termination, ringer impedance, and ringer threshold. In addition, the Si2493 has been designed to meet the most stringent worldwide requirements for out-of-band energy, billing-tone immunity, surge immunity, and safety requirements. The Si2493 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 RS-232 port. This interface allows for PC evaluation of the modem immediately upon powerup via the AT commands using standard terminal software. 4.1. Host Interface The Si2493 interfaces to the host processor through either an asynchronous serial interface, a synchronous Serial Peripheral Interface (SPI), or a parallel interface. The default is asynchronous serial communication. Selection of either SPI or parallel interface is done on power-up with reset strapping. Please refer to “AN93: ISOmodem® Chipset Family Designer's Guide” for details. 4.1.1. Asynchronous Serial Interface The Si2493 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. 4.1.2. Serial Peripheral Interface (SPI) The serial peripheral interface (SPI) provides a flexible, full-duplex synchronous serial bus for host processor and Si2493 ISOmodem communication. When the Si2493 is powered up with SPI mode enabled the modem becomes an SPI slave, and the pins are configured to SS (slave select input, active low), MOSI (serial data input to modem), MISO (serial data output from modem) and SCLK (serial data clock input). Each SPI operation consists of a control-and-address byte and a data byte. 4.1.3. Parallel Interface (24-Pin Version Only) The Si2493 can also communicate via a parallel interface when using the 24-pin version. The parallel interface is an 8-bit data bus with a single bit address to memory mapped registers. UART Interface Parallel Interface DAA Interface PLL Clocking XTI XTO CLKOUT C1 To Phone Line AOUT Data Bus RXD TXD CTS RTS DCD ESC RI CS WR RD A0 D0-D7 Program Bus EEPROM Interface EESD EECLK EECS C2 SPI Interface MISO MOSI SCLK INT RESET ROM RAM SS |
Similar Part No. - SI2493D |
|
Similar Description - SI2493D |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
