User's Manual

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FIBOCOM N510-GL Hardware User Manual Page 30 of 56
6 Functional Interface
6.1 Control Interface
6.1.1 Module Startup
6.1.1.1 Explanation of switch pin
N510-GL module switch pins are defined as follows:
Table6-1 Definition of Switch Interface Pin
PIN
Pin Name
I/O
Pin Description
Power Domain
（TYP）
14
POWER_ON
I
Power ON
3.3V
6.1.1.2 Startup Operation Requirements
When the N510-GL module is in shutdown mode, the module can be turned on by lowering
POWER_ON (800 ms < lowering time < 2.5s). It is recommended that OC/OD drive circuit be used to
control POWER_ON pin, and the low-level voltage must be less than or equal to 0.5V when POWER_ON
is turned on. The reference circuit is shown in the following figure:
Figure6-1 OC/OD Driver Reference Switch-on Circuit
Another way to control the POWER_ON pin is to use a button switch directly. A TVS (recommended
ESD9X5VL-2/TR) is placed near the button for ESD protection. The reference circuit is shown in the
following figure: