GENERAL DESCRIPTION
The ST70235A can be split up into two different sections. The physical one performs the DMT modulation, demodulation, Reed-Solomon encoding, bit interleaving and 4D trellis coding. The ATM section embodies framing functions for the generic and ATM Transmission Convergence (TC) layers. The generic TC consists of data scrambling and Reed Solomon error corrections, with and without interleaving. The ST70235A is controlled and programmed by an external controller (ADSL Transceiver Controller, ATC) that sets the programmable coefficients. The firmware controls the initialization phase and carries out the consequent adaptation operations. s FINE (2PPM) TIMING RECOVER USING ROTOR AND ADAPTATIVE FREQUENCY DOMAIN EQUALIZING s TIME DOMAIN EQUALIZATION s FRONT END DIGITAL FILTERS s 0.25µm HCMOS7 TECHNOLOGY s 144 PIN TQFP s POWER CONSUMPTION: 0.4 WATT APPLICATIONS
Routers at SOHO, stand-alone modems, PC modems. TQFP144 Full Plastic (20 x 20 x 1.40 mm) ORDER CODE: ST70235A October 2001 This is advance information on a new product now in development or undergoing evaluation.
STMicroelectronics
