GENERAL DESCRIPTION

The Winbonds single chip TE mode ISDN S/T interface controller (W66910) is an all-in-one device suitable for ISDN Internet access. Three HDLC controllers are incorporated in the chip, one for D channel and the other two for B channels. These HDLC controllers facilitate efficient access to signaling and data services. It also provides 8-bit microprocessor interface to serve as general purposed controller for embedded applications.

FEATURES

* Full duplex 2B + D S/T-interface transceiver compliant with ITU-T I.430 Recommendation, TE mode

* One D channel HDLC controller

- Maskable address recognition

- Transparent (HDLC) mode

- FIFO buffer (2 x 128 bytes)

* Two B channel HDLC controllers

- Maskable address recognition

- Bit rate options : 56 or 64 kbps

- Transparent (HDLC mode) or extended transparent mode (clear channel)

- FIFO buffer (2 x 128 bytes) per B channel

- 128K IDSL or OCN with one HDLC to bundle two B channels

* Two PCM codec interfaces for speech and POTS application

* Various B channel switching capabilities and PCM intercom

* GCI master/slave interface

* Peripheral control pins

* 8-bit microprocessor interface for embedded applications

* Analog power down mode to 1.5mA power consumption

* Advanced CMOS technology

* 100-pin LQFP packag