SC14428 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鈥檚 standard CompactRISC
TM
CR16C microprocessor takes care of all the higher protocol
stack.
鈻?/div>
Programmable 16 bits system bus interface with bus
master and slave operation.
鈻?/div>
User programmable GENeric DSP with fixed telecom
processing routines.
鈻?/div>
Four full duplex 32 kbits/sec ADPCM transcoder.
鈻?/div>
On-chip Dedicated Instruction Processor (DiP) for all
TDMA based events, which supports DCT 1.152MHz,
0.576MHz and 0.288MHz data rates.
鈻?/div>
ISM band and DECT with 9.216, 10.368 and 13.824 MHz
xtals.
鈻?/div>
Protected and unprotected full and double slot B-fields
鈻?/div>
Flexible 1.152 Mbit/sec three wire interface to radio front
synthesizer.
鈻?/div>
One 16-bit linear CODEC
鈻?/div>
Selectable Fast Antenna Diversity operation or RSSI
measurement with peak hold ADC.
鈻?/div>
Three input general purpose 8 bit ADC
鈻?/div>
Two general purpose timers and watch dog timer.
鈻?/div>
Two Capture timers for frequency measurement for e.g.
metering, ringing and call progress tone detection.
鈻?/div>
Three general purpose I/O ports with two edge/level pro-
grammable interrupts
鈻?/div>
Full duplex UART and MICROWIRE
TM
interface.
鈻?/div>
SPI
TM
interface (Master/Slave).
鈻?/div>
Flexible 8 kHz synchronous Serial interface to external
codecs and ISDN interface circuits.
鈻?/div>
Three programmable chip selects
鈻?/div>
Integrated opamp for caller-id
鈻?/div>
(80 pin PFQP and 80,)128,160 pins TQFP packages.
2.0 Features
鈻?/div>
Complies with DECT ETS 300 175-2,3 & 8 SWAP-CA
V1.3 Rev 1.3 20000616
鈻?/div>
1.8Volt operating voltage with 2.65V (typ) IO pads.
鈻?/div>
Two chip low drop voltage regulators
鈻?/div>
16 bit CompactRISCTM CR16C Microprocessor with
programmable clock speeds up to 20.736 MHz.
鈻?/div>
Four channel DMA controller.
鈻?/div>
Serial Debug interface, Nexus Class-1 compliant.
鈻?/div>
16kbyte shared, 6kbyte non shared RAM
鈻?/div>
4kbyte shared RAM for TAM DSP
鈻?/div>
Versions with ROM, FLASH and data FLASH
3.0 System Diagram
SC14428
SC14428
SC14428
CID
HANDSFREE
ISDN OR
DATA
INTERFACE
PSTN
INTERFACE
PSTN
INTERFACE
ISDN
PSTN1
PSTN2
SC14428
SC14428
SC14428
CompactRISC
TM
is a trademark of National Semiconductor Corporation
漏
2004 National Semiconductor Corporation
www.national.com
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TRIAC|200V V(DRM)|6A I(T)RMS|TO-220
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TRIAC|600V V(DRM)|6A I(T)RMS|TO-220
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