sc14428 National Semiconductor Corporation, sc14428 Datasheet

sc14428

Manufacturer Part Number

sc14428

Description

Baseband Processor Dect Wdct

Manufacturer

National Semiconductor Corporation

Datasheet

1.SC14428.pdf (6 pages)

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Download datasheet (112Kb)

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

CR16C microprocessor takes care of all the higher protocol

stack.

2.0 Features

3.0 System Diagram

CompactRISC

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

Semiconductor’s

is a trademark of National Semiconductor Corporation

SC14428

standard

SC14428

CompactRISC

SC14428

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

SPI

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.

SC14428

CID

HANDSFREE

interface (Master/Slave).

ADVANCED INFORMATION

PSTN

INTERFACE

PSTN

INTERFACE

ISDN OR

DATA

INTERFACE

ISDN

PSTN1

PSTN2

interface.

www.national.com

March 2004

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