ST20190

The ST20190 is a new generation ADSL chipset from STMicroelectronics. It is highly integrated and has the flexibility to offer all standards, all annexes while being fully optimised for CPE applications. It provides all the required functions to implement a complete Utopia rate adaptive DMT ADSL modem.

ST20190 consists of the optimised ADSL Analogue Front-End chip ST20184 and the digital chip ST20196 which includes a DMT/ATM modem, and a dedicated ADSL Transceiver Controller with associated Firmware. As shown in Fig.2, the chipset interfaces have been defined to allow direct integration into systems design, reducing both time-to-market and im- plementation risks. The data interface is implemented as an ATM Utopia interface. A HW/FW command and control interface (CtrlE) to communicate with external management entities, is directly provided, without need for glue logic. The chipset employs Discrete Multi-Tone modulation as specified in ANSI T1.413. It also supports ETSI TS 101 388 and ITU standards G.992.1 (G.dmt) including Annex A, B and C; G.992.2 (G.lite) annex A, B and C; G.992.3 (ADSL2) including Annex A, B, C, I, J and L; G.992.5 (G.ADSL+) including Annex A, B, C, I, J and Annex L. Flexible bit assignment is foreseen to support ADSL overlay over POTS and ISDN but also All Digital loop and overlapping spectra. Additional Reed-Solomon forward error correction with optional interleaving provides maximum noise immunity.