SC14402 Datasheet | National Semiconductor

Description Preliminary document version 1.5. The SC14402 is a 3.0 Volt CMOS chip optimized to handle all the audio, signal and data processing needed within a DECT handset. An ADPCM transcoder, a very low power CODEC and Analog Frontend is integrated. Direct connections towards microphone and a (dynamical) loudspeaker are provided. The SC14402 is designed such that it is patible with many radio interfaces. A dedicated TDMA controller handles all physical layer slot formats and radio control. National Semiconductors standard pact RISCTM CR16A 16 bit microcontroller with external ROM takes care of all the higher protocol stack. s s s s s s s s s s s s s s s s s s s 2.95 to 3.6 Volt operating voltage. Very low power in active and paging mode. Max 5V battery input. Embedded 16 bit pact RISCTM Micro Controller. (CR16A) with programmable clock speeds. ACCESSBUSTM or MICROWIRETM interfaces can be handled. 4 k Byte on-chip Data Memory. One full duplex ADPCM transcoder. On-chip 14-bit linear CODEC. 8 upto 38 d B gain differential microphone input buffer. 100 Ω loudspeaker driver. Software controlled gain on audio input and output. On-chip gaussian Modulator. Peak hold ADC for RSSI measurement. Three general purpose inputs can be multiplexed on an 8 bit ADC with selectable ranges. Advanced battery management unit On board dedicated TDMA instruction co-processor (Di P). Eight programmable control signals for radio front end. Serial interface to control radio front end circuitry. Full support of all data formats. Features s Integrated DECT Baseband transceiver optimized for GAP handsets according to ETS 300 175-2, 175-3 & 175-8. System Diagram SC14401 SC14402 SC14422 ISDN or PSTN Interface PSTN ISDN SC14401 SC14402 ACCESSBUSTM, MICROWIRETM and pact RISCTM are trademarks of National Semiconductor Corporation. Copyright 1998 National Semiconductor...