Sony Ericsson K700 Schematics 5

Uppgjord (även faktaansvarig om annan) - Prepared (also subject responsible if other) Nr - No.

LD/SEMC/BGURBDG Daniel Flinck 2/1551 – ROA 128 1044 Uen

Dokansv/Godk - Doc respons/Approved Kontr - Checked Datum – Date Rev File

BGURBDGC (Johan Mercke) 2004-04-13 A

Approved according to 000 21-LXE 107 42/1

DESCRIPTION 1 (10)

TECHNICAL DESCRIPTION:
BASEBAND AND AUDIO CIRCUITS
ON THE TRANSCEIVER BOARD

CONTENTS
1

GENERAL 2

1.1 Cross References 2

1.1.1 Names 2

1.1.2 Abbreviations 3
2 CHANGES BETWEEN REVISIONS 3
3 DATA FLOW 4

3.1 TX path 4

3.2 RX path 5

3.3 Data Communication 5
4 DESCRIPTION OF VARIO US FUNCTIONS 5

4.1 ON/OFF circuitry 5

4.1.1 ON/OFF button 5

4.1.2 ONSRQ signal 6

4.1.3 Auto Turn On 6

4.1.4 Alarm 6

4.2 POWER SUPPLY 6

4.3 AUDIO 7

4.4 Polyphonic ring signals 8

4.5 RED INDICAT OR 8

4.6 KEYBOARD SCANNING 8

4.7 KEYBOARD AND DISPLAY ILLUMINAT ION 8

4.8 Flash LED 8

4.9 LCD AND CAMERA INTERFACE 9

4.10 REAL TIME CLOCK 9
5 MEMORIES 9

5.1 Memory configuration 9

5.1.1 Main memory 9

5.1.2 NAND memory 9

5.1.3 Programming 10

DESCRIPTION 2 (10)

Uppgjord (även faktaansvarig om annan) - Prepared (also subject responsible if other) Nr - No.

LD/SEMC/BGURBDG Daniel Flinck 2/1551 – ROA 128 1044 Uen

Dokansv/Godk - Doc respons/Approved Kontr - Checked Datum – Date Rev File

BGURBDGC (Johan Mercke) 2004-04-13 A

1 GENERAL

This document describes the baseband and the audio processing cir c uit s ,
which are part of the transceiver board mounted in different digital pock et
phones of GSM type.

The other part of the transceiver board that carries the radio circuits is
described in the corresponding document start ing with 1/1551 -.

One purpose of the baseband part is to cont r ol and m onitor transmission and
reception, to co-operate with the telephone exchanges of the mobile
telephone system and to do the processing of audio signals to and from the
mobile phone.

Chapter 2 contains information about docum ent revisions.
In chapter 3 the data flow through t he phone is described in both TX and RX

direction.
In chapter 4 are several of the electrical functions and circuits described more

in detail.
Chapter 5 describes the different memory types used in the phone.

1.1 Cross References

1.1.1 Names

In most cases the diff er ent circuits in the phone are given names which are
used during the development phase. These names are also used in this
description.

The following list shows the used circuit names and the corr esponding
position numbers used in the schematics.

Marita Compact D2200
Vincenne N2600
FM-radio N4100
NOR-flash &

D2220
PSRAM (main
memory

NAND-flash D2230
Blueberry Data D3100

DESCRIPTION 3 (10)

Uppgjord (även faktaansvarig om annan) - Prepared (also subject responsible if other) Nr - No.

LD/SEMC/BGURBDG Daniel Flinck 2/1551 – ROA 128 1044 Uen

Dokansv/Godk - Doc respons/Approved Kontr - Checked Datum – Date Rev File

BGURBDGC (Johan Mercke) 2004-04-13 A

1.1.2 Abbreviations

Some common abbreviations are used in the text. These ar e explained
below.

A/D Analogue/Digital
CUI Command User Interface
D/A Digital/Analogue
DSP Digital Signal Processor
HW Hardware
LCD Liquid Crystal Display
LED Light Emitting Diode

S Mobile Station

M
PCB Printed Circuit Board
PWM Pulse Width Modulation
RF Radio Frequency
RSSI Received Signal Strength Indicator
RTC Real Time Clock
RX Receive
SIM Subscriber Identity Module
TAE Terminal Adapter Eq uipm ent
TX Transmit
GDFS Global Data File System

2 CHANGES BETWEEN REVISIONS

Rev A - the first revision.