Telit GE864 and GC864
Product Description
80273ST10008A Rev. 3 - 10/02/06
Reproduction forbidden without DAI Telecom written authorization – All Right reserved – Right of modification reserved
page 19 of 72
Reset Signal Operating levels
:
Signal Min
Max
RESET Input high
2.2V*
3.3V
RESET Input low
0V
0.2V
* this signal is internally pulled up so the pin can be left floating if not used.
If unused, this signal may be left unconnected. If used, then it
must always be connected with an
open collector transistor
, to allow to the internal circuitry the power on reset and under voltage
lockout functions.
2.14 RTC Bypass out
The VRTC signal brings out the Real Time Clock supply which is separate from the rest of the
digital part, allowing having only RTC going on when all the other parts of the device are off.
To this power output a backup capacitor can be added in order to increase the RTC autonomy
during power off of the battery. NO Devices must be powered from this pin.
2.15 VAUX power output
A regulated power supply output is provided in order to supply small devices from module.
This output is active when the module is ON and goes off when module is shut down.
The operating range characteristics of the supply are:
Operating Range - Vout power supply
Min
Typ
Max
Output voltage
2.75V
2.85V
2.95V
Output current
100mA
Output bypass capacitor
2.2
μ
F
