Sony Ericsson GR64 User Manual

Page 4

LZT 123 1834

3 Abbreviations ....................................................................................... 22

Integrating the Wireless Modem ................................................................. 24

4 Mechanical Description......................................................................... 25

4.1

INTERFACE DESCRIPTION ........................................................................................ 25

4.2

PHYSICAL DIMENSIONS ........................................................................................... 27

5 System Connector Interface.................................................................. 29

5.1

OVERVIEW .............................................................................................................. 29

5.2

DEALING WITH UNUSED PINS................................................................................... 32

5.3

GENERAL ELECTRICAL AND LOGICAL CHARACTERISTICS.......................................... 34

5.3.1

LEVEL SHIFTER INTERFACES.............................................................................. 34

5.3.1.1

COMMON LEVEL SHIFTER INTERFACE ............................................................ 34

5.3.1.2

I2C LEVEL SHIFTER INTERFACE...................................................................... 36

5.4

GROUNDS............................................................................................................... 37

5.4.1

ANALOGUE GROUND (AREF) ............................................................................. 37

5.4.2

COMMON GROUND (GND)................................................................................ 37

5.5

REGULATED POWER SUPPLY INPUT (VCC)................................................................. 38

5.6

VOLTAGE REFERENCE (VREF) ................................................................................... 39

5.6.1

VREF AS AN OUTPUT........................................................................................ 39

5.6.2

VREF AS AN INPUT ........................................................................................... 39

5.7

BATTERY CHARGING INPUT (CHG_IN) ...................................................................... 41

5.7.1

CHARGING PROCESS ........................................................................................ 42

5.7.2

SERIES DIODE................................................................................................... 43

5.7.3

BATTERY SELECTION........................................................................................ 43

5.8

POWERING THE MODULE ON AND OFF (ON/OFF) ..................................................... 47

5.8.1

TURNING THE MODULE ON .............................................................................. 47

5.8.2

TURNING THE MODULE OFF ............................................................................. 48

5.9

ANALOGUE AUDIO .................................................................................................. 50

5.9.1

AUXILIARY AUDIO TO MOBILE STATION (AUXI).................................................. 51

5.9.2

AUXILIARY AUDIO FROM MOBILE STATION (AUXO)............................................ 52

5.9.3

MICROPHONE SIGNALS (MICIP, MICIN) .............................................................. 52

5.9.4

SPEAKER SIGNALS (EARP, EARN) ....................................................................... 53

5.10

PCM DIGITAL AUDIO (SSP) ................................................................................... 53