User Manual

GM47/48 Technical description
BA/SEM/MS 02:0004 Rev B
19
Figure 3.2ON/OFF and VIO performance
Where the times are defined as follows:
Time Description Min Typ Max Unit
t
MR
Time to start an ON/OFF operation 1 1.5 S
t
PWR
Time for module start-up one ON/ OFF
signal has set to TRUE
100 200 Ms
3.5.2 External 2.75 V (VIO)
The VIO has been derived from a 2.75 V regulator. It is possible to
use this output as a power supply at 2.75 V with a maximum of 75mA.
It will indicate that the module is alive and it could power external
devices. In this case, the external applications do not need to
implement a 2.75 volt regulator to adapt the incoming (from module
point of view) serial data.
Parameter Minimum Typical Maximum Units
Output Voltage (I
load
=50 mA) 2.70 2.75 2.85 Volts
Load current 75 mA
3.6 Analogue Audio
Pins Name Dir Description
57 AFMS O Audio From Mobile Station
59 ATMS I Audio To Mobile Station
60 AGND - Reference for analogue audio