NSC SC14422DVJG Datasheet
Copyright 1998 National Semiconductor Corp. 1
www.national.com
SC14422
Complete Baseband Processor for DECT Base Stations
General Description
Preliminary document version 1.1.
The SC14422 is a 3.0 Volt CMOS IC optimized to handle
all the audio, signal and data processing needed within a
DECT basestation. An ADPCM transcoder, a very low
power CODEC and Analog Frontend are integrated. Direct connections towards analog or ISDN line interface.
The SC14422 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
CR16A processor core with external Program memory
(Flash or ROM) takes care of all the higher protocol stack.
Programmable I/O ports can be configured as chip selects
for I/O expanders, Serial Flash memory, interrupt source
or I/O. A digital serial interface can be configured to interface to many codecs and ISDN devices with
µ-Law, a-Law,
linear or transparent data formats.
Features
■ Integrated DECT base band transceiver optimized for
GAP base stations according to ETS 300 175-2, 175-3
& 175-8.
■ 3.0 to 5.5 Volt operating voltage.
■ Embedded 16 bit CompactRISC
TM
CR16A Microproc-
essor with In System Emulation (ISE) mode.
■ 2k + 4kbyte Data Memory.
■ Two full duplex 32 kbits/sec ADPCM transcoder.
■ 14-bit linear CODEC with programmable gain
■ Serial interface to external codecs and ISDN interface
circuits.
■ Echo canceller, two echo suppressors, DTMF generator, sidetone and artificial echo loss.
■ On-chip gaussian Modulator.
■ Peak hold ADC for RSSI measurement
■ Three input 8 bit successive approximation ADC.
■ On board programmable Dedicated Instruction Proces-
sor (DIP) for all TDMA based events.
■ Protected and unprotected half, full and double slot Bfields D00, D08, D32 and D80
■ Standard DECT encryption with different keys for
different MAC-connections.
■ 6 MAC connections can be handled simultaneously.
■ Flexible three wire interface to radio front synthesizer.
■ Three general purpose I/O ports with programmable in-
terrupts.
■ General purpose full duplex UART.
■ SPI
TM
and MICROWIRETM interfaces.
■ Two general purpose timers and watchdog timer.
■ Programmable chip selects to 8 bit wide ROM, SRAM
NAND Flash Memory and I/O expanders.
■ Capture timer for frequency measurement for e.g. metering, ringing and call progress tone detection.
■ 100 pin TQFP-100 package.
________________________________________________________________________________________________
System Diagram
SC14401
SC14402
SC14401
4220030
SC14402
SC14402
SC14422
PSTN
ISDN
ISDN or
PSTN
Interface
PRELIMINARY
March 1998
SC14422 Complete Baseband Processor for DECT Base Stations
SPITM is a trademark of Motorola, MICROWIRETM and CompactRISCTM are trademarks of National Semiconductor Corporation
Table of Contents
Copyright 1998 National Semiconductor Corp. 2
www.national.com
1.0CONNECTION DIAGRAM . . . . . . . . . . . . . . . . . . . . .3
2.0PIN DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Copyright 1998 National Semiconductor Corp. 3
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1.0Connection Diagram
Order Number SC14422VJG (Standard version)
Order Number SC14422RVJG (‘R’ Version works with RTX-GAP Software)
See NS Package Number VJG100A
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