Fibocom H330S, Hardware User Manual

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H330S Hardware User Manual Page 27 of 44
5.2 Power on/off and Reset Signal
5.2.1 Pin Definition of Power on/off Control Signal
H330S wireless modules provide three control signals to start up, shut down, and reset the modules.
Pins definition as listed below :
Pin# Pin Name Electrical Level Description
48 POWER_OFF CMOS 1.8V Power off signal
49 POWER_ON CMOS 1.8V Power on signal
77 RESET_ALL_N CMOS 1.8V External reset signal input
5.2.2 Power on Signal
After the module is connected to the power supply, the user can start up the module by setting low
POWER_ON signal low.
Timing sequence requirement of the startup pulse:
Parameter Condition Minimum Value Typical Value Maximum Value Unit
Pulse Width 100 300 3000 ms
The timing sequence control is shown in the diagram below:
Figure 5- 2 Timing Control
The recommended design of POWER_ON signal is as follows:
Figure 5- 3 POWER_ON Reference Design