Sony Ericsson GR47/GR48 - Manual (Page 26)

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