1. INTRODUCTION

12v

DC Power Socket,

Input 10..15V

5V to development

board circuits

5V

2V7

reg.

reg.

3V8

reg.

Vcc

Switched

 

VIO present

when VIO

 

LED

present

 

 

2V7 To development board & interface circuits

VIO

GM47

3V8 VCC

+ -

TP4 TP5

Figure 1.2 Power supply connection and the on-board voltages

Figure 1.3, Figure 1.4 and Figure 1.5 show how various signals are routed on the developer’s board. Thicker lines indicate multiple signals.

GM47

J12

VIO

General purpose I/O

LED

 

 

 

STATUS LED

 

 

 

 

 

 

 

 

(Blinks when

ON/OFF

 

 

 

connected to network)

 

 

 

 

SERVICE

 

 

SW4

ON/OFF

 

 

 

 

 

 

2V7

 

I²C

 

 

 

SERVICE LED

 

 

 

 

 

 

n/c

 

(Lit when SW4 closed)

VRTC

 

 

 

 

SIM

 

 

 

0.22F

 

 

 

 

 

 

 

J5

 

 

Selectable

 

 

 

 

Jumpers

 

SIM holder with

 

 

U10 SIM

 

 

 

 

SIM presence

 

 

 

 

 

 

 

 

switch (to DGND)

 

Figure 1.3 Miscellaneous signals, connection and routing

27

LZT 123 7263 R1C

Page 27
Image 27
Sony Ericsson GM47, GM48 manual Power supply connection and the on-board voltages