Integration Guide

GEM3 Module Hardware Integration Guide Version 0.1
North Pole Engineering
221 N 1st St, Minneapolis, MN 55401
www.npe-inc.com
612.305.0440
3.3 ELECTRICAL SPECIFICATIONS
3.3.1 Absolute Maximum ratings
Parameter
Min
Max
VDD_nRF
-0.3V
+3.9V
VDD_HV
-0.3V
+5.8V
VBUS
-0.3V
+5.8V
VIO, VDD_nRF <= 3.6V
-0.3V
VDD+0.3V
VIO, VDD_nRF > 3.6V
-0.3V
3.9V
Storage Temperature
-40C
+85C
3.3.2 Recommended Operating Parameters
Parameter
Min
Typical
Max
VDD_nRF
1.7V
3.0V
3.6V
VDD_nRF maximum ripple
10mV
VDD_nRF Rise time
60ms
Operating Temperature
-40C
+85C
4 DESIGN CONSIDERATIONS
The GEM3 module has been designed for easy integration into OEM applications requiring
minimal additional componentry. The following section provides suggestions to ensure
successful integration of the GEM3 module.
4.1 HARDWARE
4.1.1 VDD_nRF
Ensure the power source operating range and noise is within the specified limits for the GEM3
module and filter capacitors are incorporated as needed. The GEM3 module includes decoupling
capacitors for circuits within the module. External circuits sharing the same power source
should also be decoupled locally at connections to VDD_nRF and GND.
4.1.2 Updating Module Firmware
The GEM3 module firmware can be updated over the air using the North Pole Engineering utility
application. The North Pole Engineering utility application can be downloaded here:
www.xxxx.yyy.com
The GEM3 module firmware can also be updated through the Serial Wire Debug interface. The
following circuit example provides a reference for developers wanting an alternative to
programming the GEM3 module over the air: