Sony Ericsson GR47/GR48 Manuale Utente

5. SYSTEM CONNECTOR INTERFACE

26

LZT 123 7589 R1A

(1)

 The GR47 measures the voltage at VCC during the power-up sequence. 

It is important that both VCC and ON/OFF reach a minimum of 3.2V before 

the ON/OFF low pulse is initiated.

(2)

 In SERVICE mode.

t

9,2

Time after start of 

ON/OFF pulse 

when VIO is 

active

VCC > 3.2V

-

45.0

-

ms

t

38/6(

Application ON/

OFF pulse width

ON/OFF held low 

until detected 

by software

400

500

-

ms

t

3567

Internal Power-

on reset signal 

initiates software

100

-

200

ms

t

&76

Time when 

software 

controlled CTS 

signal indicates 

module READY

CTS signal 

configured for 

RS232 hardware 

flow control, not 

GPIO pin

-

0.35

3.0

(2)

s