SC14402 Datasheet, PDF (1/7 Pages) National Semiconductor (TI) – Complete Baseband Processor for DECT Handsets

PRELIMINARY
February 1998
SC14402
Complete Baseband Processor for DECT Handsets
General 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 con-
nections towards microphone and a (dynamical) loud-
speaker are provided.
The SC14402 is designed such that it is compatible with
many radio interfaces.
A dedicated TDMA controller handles all physical layer
slot formats and radio control.
National Semiconductors standard CompactRISC^TM
CR16A 16 bit microcontroller with external ROM takes
care of all the higher protocol stack.
Features
s Integrated DECT Baseband transceiver optimized for
GAP handsets according to ETS 300 175-2, 175-3 &
175-8.
s 2.95 to 3.6 Volt operating voltage.
s Very low power in active and paging mode.
s Max 5V battery input.
s Embedded 16 bit CompactRISC^TM Micro Controller.
(CR16A) with programmable clock speeds.
s ACCESSBUS^TM or MICROWIRE^TM interfaces can be
handled.
s 4 kByte on-chip Data Memory.
s One full duplex ADPCM transcoder.
s On-chip 14-bit linear CODEC.
s 8 upto 38 dB gain differential microphone input buffer.
s 100 Ω loudspeaker driver.
s Software controlled gain on audio input and output.
s On-chip gaussian Modulator.
s Peak hold ADC for RSSI measurement.
s Three general purpose inputs can be multiplexed on an
8 bit ADC with selectable ranges.
s Advanced battery management unit
s On board dedicated TDMA instruction co-processor
(DiP).
s Eight programmable control signals for radio front end.
s Serial interface to control radio front end circuitry.
s Full support of all data formats.
________________________________________________________________________________________________
System Diagram
SC14401
SC14402
SC14422
ISDN or
PSTN
PSTN
Interface ^ISDN
SC14401
SC14402
SC14402
4220030
ACCESSBUS^TM, MICROWIRE^TM and CompactRISC^TM are trademarks of National Semiconductor Corporation.
Copyright 1998 National Semiconductor Corp.
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