SC14425

SC14425 Complete Baseband processor for DECT Base Stations PRELIMINARY FEBRUARY 2000 SC14425 Complete Baseband processor for DECT Base Stations with Caller-id and Handsfree General Description The SC14425SC14425 is a 3.3 Volt CMOS IC optimized to handle all the audio, signal and data processing needed within a DECT base station. An ADPCM transcoder, a very low power 14 bit Codec and Analog Frontend are integrated. Direct connections towards analog or ISDN line interface. The SC14425 has an on-chip dedicated flexible DSP optimized for telecom applications caller-id, handsfree and allows easy connection to digital telephone answering machine devices. The SC14425 is designed to be compatible with many radio interfaces. A dedicated TDMA controller handles all physical layer slot formats and radio control. The integrated National Semiconductor’s standard CR16B processor core takes care of all the higher protocol stack. Programmable I/O ports can be configured as chip selects for I/O expanders, Serial Flashes, interrupt source or I/O. A digital serial interface can be configured to interface to industry-standard c odecs and ISDN devices with µ-Law, a-Law, linear or transparent data formats. n Embedded flexible dedicated DSP executing Caller-id (CID), Caller-id on Call Waiting (CIDCW) and handsfree, two echo cancellers, two echo suppressors, extended DTMF detection, DTMF generation, sidetone and artificial echo loss. n Two full duplex 32 kbits/sec ADPCM transcoder. n On-chip Dedic...