SC14428 Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – Baseband Processor for FP & PP DECT and WDCT

ADVANCED INFORMATION
March 2004
SC14428
Baseband Processor for FP & PP DECT and WDCT
1.0 General description
.The SC14428 is a CMOS IC optimized to handle all the
audio, signal and data processing needed within a DECT
(1.9 GHz) or 2.4GHz ISM digital band base stations and
handsets.
A four channel ADPCM transcoder, a very low power 16 bit
Codec and Analog Frontend are integrated. Direct connec-
tions towards PSTN or ISDN line interface are possible.
The SC14428 has a programmable Generic DSP opti-
mized for telecom applications.
The SC14428 is designed to fit to any radio interface. A
dedicated TDMA controller handles all physical layer slot
formats and radio control.
National Semiconductor’s standard CompactRISC^TM
CR16C microprocessor takes care of all the higher protocol
stack.
2.0 Features
■ Complies with DECT ETS 300 175-2,3 & 8 SWAP-CA
V1.3 Rev 1.3 20000616
■ 1.8Volt operating voltage with 2.65V (typ) IO pads.
■ Two chip low drop voltage regulators
■ 16 bit CompactRISCTM CR16C Microprocessor with
programmable clock speeds up to 20.736 MHz.
■ Four channel DMA controller.
■ Serial Debug interface, Nexus Class-1 compliant.
■ 16kbyte shared, 6kbyte non shared RAM
■ 4kbyte shared RAM for TAM DSP
■ Versions with ROM, FLASH and data FLASH
■ Programmable 16 bits system bus interface with bus
master and slave operation.
■ User programmable GENeric DSP with fixed telecom
processing routines.
■ Four full duplex 32 kbits/sec ADPCM transcoder.
■ On-chip Dedicated Instruction Processor (DiP) for all
TDMA based events, which supports DCT 1.152MHz,
0.576MHz and 0.288MHz data rates.
■ ISM band and DECT with 9.216, 10.368 and 13.824 MHz
xtals.
■ Protected and unprotected full and double slot B-fields
■ Flexible 1.152 Mbit/sec three wire interface to radio front
synthesizer.
■ One 16-bit linear CODEC
■ Selectable Fast Antenna Diversity operation or RSSI
measurement with peak hold ADC.
■ Three input general purpose 8 bit ADC
■ Two general purpose timers and watch dog timer.
■ Two Capture timers for frequency measurement for e.g.
metering, ringing and call progress tone detection.
■ Three general purpose I/O ports with two edge/level pro-
grammable interrupts
■ Full duplex UART and MICROWIRE^TM interface.
■ SPI^TM interface (Master/Slave).
■ Flexible 8 kHz synchronous Serial interface to external
codecs and ISDN interface circuits.
■ Three programmable chip selects
■ Integrated opamp for caller-id
■ (80 pin PFQP and 80,)128,160 pins TQFP packages.
3.0 System Diagram
SC14428
SC14428
SC14428
SC14428
SC14428
SC14428
CID
HANDSFREE
ISDN OR
DATA
INTERFACE
PSTN
INTERFACE
PSTN
INTERFACE
ISDN
PSTN1
PSTN2
CompactRISC^TM is a trademark of National Semiconductor Corporation
© 2004 National Semiconductor Corporation
www.national.com