Ublox SARA-N2 Series, Руководство по системной интеграции

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SARA-N2 / N3 series - System integration manual
UBX-17005143 - R13 System description Page 18 of 95
C1-Public
1.6 System function interfaces
1.6.1 Module power-on
1.6.1.1 Switch-on events
When the SARA-N2 series modules are in the non-powered mode (i.e. switched off, with the VCC
module supply not applied), the switch on routine of the module can be triggered by:
• Rising edge on the VCC supply input to a valid voltage value for module supply, starting from a
voltage value lower than 1.8 V, so that the module switches on applying a proper VCC supply within
the normal operating range (see SARA-N2 series data sheet [1] ).
• Alternately, the RESET_N pin can be held low during the VCC rising edge, so that the module
switches on by releasing the RESET_N pin when the VCC voltage stabilizes at its nominal value
within the normal range.
When the SARA-N3 series modules are in the non-powered mode (i.e. switched off, with the VCC
module supply not applied), the switch on routine of the module can be triggered by:
• Applying a VCC supply within the normal operating range of the module, and then forcing a low
level on the PWR_ON input pin (normally high due to internal pull-up) for a valid time period (see
SARA-N3 series data sheet [2] ).
• Alternately, the RESET_N pin can be held low during the VCC rising edge, so that the module
switches on by releasing the RESET_N pin when the VCC voltage stabilizes at its nominal value
within the normal range.
When the SARA-N3 series modules are in power off mode (i.e. switched off, with valid VCC supply
applied), the switch on routine of the module can be triggered by:
• Forcing a low level on the PWR_ON input pin (normally high due to internal pull-up) for a valid time
period (see SARA-N3 series data sheet [2] ).
When the SARA-N3 series modules are in deep sleep mode (i.e. in the Power Saving Mode defined by
3GPP Rel. 13, with valid
VCC supply applied), the wake-up routine of the module can be triggered by:
• Forcing a low level on the PWR_ON input pin (normally high due to internal pull-up) for a valid time
period (see SARA-N3 series data sheet [2] ).
As illustrated in Figure 7 , the PWR_ON line of SARA-N3 series modules is equipped with an internal
pull-up.
Baseband processor
15
PWR_ON
SARA-N3 series
Power-on
Power management
Power-on
1.1 V
Figure 7: SARA-N3 series PWR_ON input equivalent circuit description
☞
The PWR_ON input pin is not available on SARA-N2 series modules.