AD6422AST Analog Devices, AD6422AST Datasheet

AD6422AST

Manufacturer Part Number

AD6422AST

Description

Manufacturer

Analog Devices

Datasheet

1.AD6422AST.pdf (8 pages)

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GENERAL DESCRIPTION

The Analog Devices GSM Baseband Processing Chipset provides

a competitive solution for GSM based Mobile Radio Systems.

It is designed to be fully integrated, easy to use, and compat-

ible with a wide range of product solutions. Examples are

GSM900, DCS1800, PCS1900 handsets and PCMCIA data

cards. The AD20msp415 is the higher integrated successor of

the AD20msp410 chipset, which passed European GSM Type

Approval in June, 1996.

The chipset consists of two highly integrated, sub-micron, low

power CMOS components that perform the entire baseband

signal processing of the GSM handset. The system architecture

is designed to be easily integrated into current designs and form

the basis for next generation designs.

The chipset uses an operating supply voltage of 2.7 V to 3.3 V

which, coupled with the extensive power management features,

significantly reduces the drain on battery power and extends the

handsets talk time and standby time.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

FEATURES

Complete Baseband Processing Chipset Performs:

Support for GSM Data Services

Embedded 16-Bit Microcontroller

Embedded 16-Bit DSP

Integrated SIM and Keyboard Interface

Interface to AD6430 GSM RF Chipset

Interface to EFR Coprocessor

JTAG Boundary Scan

Layer 1 Software Provided with Chipset

Software Compatible with AD20msp410

Full Phase 2 Protocol Stack Software Available

Full Reference Design Available for

Ultralow Power Design

Two TQFP Devices, Occupying Less than 7.5 cm

APPLICATIONS

GSM/ DCS1800/ PCS1900 Mobile Radios

Speech Coding/Decoding (GSM 06.XX)

Channel Coding/Decoding (GSM 05.03)

Equalization with 16-State Viterbi, Soft Decision

All ADC and DAC Interface Functions

Includes All Radio, Auxiliary and Voice Interfaces

Baseband Section and Radio Section

2.7 V to 3.3 V Operating Voltage

Intelligent Power Management Features

XXX mW Power Dissipation in Talk Mode

XX mW Power Dissipation in Standby Mode

CHIPSET COMPONENTS

GSM Processor (GSMP)

The AD6422 combines application specific hardware, an em-

bedded 16-bit DSP and an embedded 16-bit microcontroller

(Hitachi H8/300H). It performs channel coding and decoding

and executes the protocol stack and user software. The DSP

implements full rate speech transcoding according to GSM

specifications, including Discontinuous Transmission (DTX)

and Comfort Noise Insertion (CNI). A high performance soft-

decision Viterbi equalizer is also implemented in software em-

bedded in the DSP. The embedded microcontroller executes

the Layer 1, 2, 3 and user MMI software. The required Layer 1

software is supplied with the chipset. To ensure minimum power

consumption, the GSMP has been designed to control all the

power-down functions of the other components in the handset.

Voiceband/Baseband Converter (VBC)

The AD6421 performs the voiceband and baseband analog-to-

digital and digital-to-analog conversions, interfacing the digital

sections of the chipset to the microphone, loudspeaker and radio

section. In addition, the VBC contains all the auxiliary convert-

ers for burst-ramping, AFC, AGC, battery and temperature

monitoring. The chipset interfaces directly with the radio and

supplies all the synthesizer and timing control signals required

to support two synthesizers and a variety of radio architectures

including the AD6450 GSM RF-Chipset.

Software

The required Layer 1 software is supplied with the chipset. In

addition, an object code license is available for Layers 2 and 3 of

the protocol stack.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

Baseband Processing Chipset

256K

DISPLAY

EEPROM

KEYPAD

128K

ROM

RAM

GSM/DCS1800/PCS1900

SYSTEM ARCHITECTURE

World Wide Web Site: http://www.analog.com

AD20msp415

VOICEBAND/

PROCESSOR

BASEBAND

AD6421

CODEC

AD6422

GSM

AD20msp415

TERMINAL

ADAPTER

RADIO

DATA

SIM

Related parts for AD6422AST

AD6422AST Summary of contents

Page 1

... REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use ...

Page 2

... AD20msp415 ARCHITECTURE OVERVIEW Analog Devices and The Technology Partnership (TTP) pro- vide a cost effective and proven method of attaining the baseband processing subsystem and protocol stack software. This data sheet includes functional descriptions of the baseband process- ing subsystem and the Protocol Stack Layer 1. The Technology Partnership can provide licenses to software and reference de- signs in all areas of a GSM handportable terminal ...

Page 3

AUXILIARY SYSTEM FUNCTIONS The GSMP and the VBC perform a number of auxiliary func- tions that are essential to build a complete mobile radio. A general radio section constitutes the three functions of trans- mitter, receiver and synthesizer. Figure 2 ...

Page 4

AD20msp415 Generation of Auxiliary Audio Signals Under control of Layer 1, the GSMP can generate a variety of fixed and user-programmable tones. This includes all standard DTMF and Call Progress tones as well as user defined tones. The tone structure ...

Page 5

... This interface is activated in one of the test modes. A fully functional “DAI box” needed for the FTA process may be obtained from Analog Devices upon request. Digital Interface to GSMP for Data Services The chipset uses a serial interface that is connected to an exter- nal data terminal adapter as described in the AD6422 data sheet ...

Page 6

AD20msp415 ACCESSORIES TEST TEST INTERFACE INTERFACE SIM SIM CARD INTERFACE ADDRESS DAI CONTROL FLASH DATA VBC INTERFACE SRAM GSMP DISPLAY DISPLAY CONTROL CONTROL BACKLIGHT BACKLIGHT CONTROL KEYPAD KEYPAD INTERFACE COPROCESSOR EEPROM EEPROM INTERFACE SYNTHESIZER DATA DATA INTERFACE INTERFACE Digital Interface ...

Page 7

... PCMCIA applications. EFR* Unit An Evaluation and Development system may be ordered for this chipset, under the part number, NRE20msp415EB1. TQFP –7– AD20msp415 ORDERING GUIDE Part Number Supply Voltage Range AD6421AST +2 +3.3 V AD6422AST +2 +3.3 V AD6423 +2 +3.3 V ...

Page 8

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