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Home > Products > Embedded Systems > Hardware > PC104 > SigC54xx-PC/104

SigC54/55xx-PC/104 Embedded Telecom / VoIP / Acoustic DSP Card


SigC54xx-PC/104  board shown with one (1) SigC5416 processor module and one (1) SigSD4 4-channel audio module installed. -- Click here to see full-size picture


SigC54xx-PC/104  board shown with one (1) SigC5416 processor module and one (1) SigSD4 4-channel audio module being installed. -- Click here to see full-size picture


The SigC54xx-PC/104 card uses a modular approach to provide up to 1920 MIPS (C54xx processor modules) or 3200 MIPS (C55xx processor modules) in a single PC/104 form-factor footprint. The card accepts modules with Texas Instruments C54xx or C55xx DSP processors and modules with 16-bit audio, speech, or other analog I/O. It is suitable for defense electronics, embedded telecom, Internet infrastructure, or data acquisition and measurement applications where space is at a premium.

Applications for the SigC54/55xx-PC/104 card include base-station processing, VoIP (voice-over Internet protocol) networking functions, VoDSL (voice-over DSL), Internet routing, multiple-channel speech or audio code / decode (e.g. G.7xx, GSM, or MELP speech compression and MP3 audio compression), modem banks, echo cancellation, and speech recognition.

The modular approach used by the SigC54/55xx-PC/104 card is particularly well suited to providing a scalable solution for defense electronics, telecom, Internet equipment, and data acquisition/measurement applications that require multiple DSP devices. For example, channel capacity is highly configurable and upgradeable.

The SigC54/55xx-PC/104 card is a PC/104 format board, fully compliant with PC/104 specification v2.3 in dimensions and mechanical considerations.

SigC54/55xx-PC/104 Feature Summary

  Application example of SigC54xx-PC/104 card and enclosure. Click to see blow-up picture and captions.

Specifications and Data Sheets

Telephony T1/E1 Interface

The Rev. C SigC54/55xx-PC/104 card contains a Dallas Semiconductor DS2155 device with integrated framer/transceiver that provides a T1/E1 interface available on a 10-pin header at the board edge. Up to 24 data streams and 8 signalling streams can be processed by any combination of DSPs. The Rev. D card contains a PMC-Sierra PM4354 device with integrated framers and transceivers that provide a quad T1/E1 interface at headers on the board edge. Up to 96 data streams may be processed by the DSPs.

Command, control, and status information is available to the host interface, and all TDM data may be routed to the DSP module sites, via the programmable PLD switch matrix.

Network Interface

The Rev. D SigC54/55xx-PC/104 board contains a 10/100 Mbps Ethernet controller with PHY signals available on a header at the board edge. Rev. C boards do not contain the Ethernet controller.

For VoIP applications, Packet data may be output to the network from DSPs after speech codec, RTP, and jitter processing.

The Ethernet controller is accessible from both host and DSPs

Serial I/O Interface

The SigC54/55xx-PC/104 card provides four (4) synchronous serial channels and two (2) RS-232 asynchronous serial channels. All serial I/O signals are available at board edge; routing is performed using onboard CPLD logic, and software programmable. Levels are software-programmable for either RS-422 or RS-423 (balanced or unbalanced).

The Rev. D SigC54xx-PC/104 card also contains a single-channel USB interface, to allow connection to PCs in the field or other stand-alone operation situation.

Analog I/O

Combined with SigC54xx or SigC55xx processor modules, the SigSD4-SODIMM Audio Module offers multichannel 16-bit sigma-delta analog I/O as an integrated component in the modular solution. Audio Module features include:


The SigC54/55xx-PC/104 contains a 1M x 8 FLASH EEPROM device site for storage of boot code and nonvolatile application data.

The boot/FLASH EEPROM enables stand-alone operation.

Stand-Alone Operation Option

The SigC54/55xx-PC/104 contains a 1M x 8 FLASH EEPROM device site for storage of boot code and nonvolatile application data.

SigC54/55xx-PC/104 Software Support

The SigC54/55xx-PC/104 card, as well as other C54xx and C55xx platforms such as the Texas Instruments DSK C5402 board and SigC54/55xx-PCI board are supported by Signalogic off-the-shelf DSP software products designed for DSP-based real-time processing and C54xx DSP code development, including:

Note that if the SigC54/55xx-PC/104 board is used as a development system or in development mode, it must be plugged into a passive carrier card.