Preliminary Technical Information

AD6426

This Information applies to a product under development. Its characteristics and specifications are subject to change without notice. Analog Devices assumes no

obligation regarding future manufacture unless otherwise agreed to in writing. 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.

Revision Preliminary 2.3 (June 9, ´98)

- 3 -

Confidential Information

Table of Contents

GENERAL DESCRIPTION ...................................................1

PIN FUNCTIONALITY ( Normal Mode) ...............................4

OVERVIEW..........................................................................7

FUNCTIONAL PARTITIONING ...........................................7

Channel Codec Sub-System ...............................................7

Processor Sub-System ........................................................8

DSP Sub-System................................................................8

Speech Transcoding .......................................................8

Equalization...................................................................8

Audio Control ................................................................8

Tone Generation ............................................................8

Automatic Frequency Control (AFC) ..............................8

Automatic Gain Control (AGC) ......................................8

REGISTERS..........................................................................9

GENERAL CONTROL........................................................14

Clocks .............................................................................14

Slow Clocking .................................................................14

Real Time Clock and Alarm.............................................14

Reset ...............................................................................15

Interrupts .........................................................................15

NMI.................................................................................15

Wait ................................................................................16

Automatic Booting ...........................................................16

Power Control..................................................................16

INTERFACES .....................................................................16

Memory Interface.............................................................16

EEPROM Interface ..........................................................16

SIM Interface...................................................................17

Accessory Interface ..........................................................17

Universal System Connector Interface ..............................18

Operating modes of the USC............................................18

Buffered UART Mode (Booting/Data Services)................18

Keypad / Backlight / Display Interface .............................19

Battery ID Interface..........................................................20

EVBC Interface ...............................................................20

Radio Interface ................................................................22

Dual Band Control .......................................................22

Tx Timing Control .......................................................23

Rx Timing Control .......................................................24

Synthesizer Control ......................................................24

AGC Control................................................................25

TEST INTERFACE .............................................................27

JTAG Port....................................................................27

Debug Port Interface ....................................................29

MODES OF OPERATION...................................................29

Normal Mode (Mode A) ..................................................29

Emulation Mode (Mode D) ..............................................29

FEATURE MODES.............................................................30

DAI Mode........................................................................30

High Speed Logging.........................................................30

SPECIFICATIONS ..............................................................32

General............................................................................32

ABSOLUTE MAXIMUM RATINGS ...............................32

TIMING CHARACTERISTICS............................................33

Clocks .............................................................................33

Memory Interface.............................................................34

Radio Interface ................................................................35

High Speed Logging Interface ..........................................36

Data Interface ..................................................................37

Test Interface...................................................................38

EVBC Interface ASPORT ................................................39

EVBC Interface BSPORT ................................................40

EVBC Interface VSPORT ................................................41

Parallel Display Interface .................................................42

Serial Display Interface....................................................43

PACKAGING......................................................................44

LQFP Pin Locations.........................................................44

PBGA Pin Locations ........................................................45

LQFP Outline Dimensions ...............................................47

PBGA Outline Dimensions ..............................................48