Integration Guide

Rev 3 Sep.13 Proprietary and Confidential 9
2
2: Power
Power supply
The host provides power to the NM7371 through multiple power and
ground pins. The host must provide safe and continuous power at all times;
the module does not have an independent power supply, or protection
circuits to guard against electrical issues.
For detailed pinout and voltage / current requirements of this module, see
the NM7371 Product Technical Specification Document & Customer
Design Guidelines.
Module power states
The module has four power states, as described in Table 2-1.
Table 2-1: Module power states
State Details
Host is powered Module is powered USB interface active RF enabled
Normal
(Default
state)
• Module is active
• Default state when VCC is first applied
• Module is capable of placing / receiving calls, or establishing data connections on
the wireless network
• Current consumption is affected by several factors, including:
• Radio band being used
• Transmit power
• Receive gain settings
• Data rate
• Number of active Tx time slots
   
Low power
(‘Airplane
mode’)
• Module is active
• Module enters this state:
• Under host interface control
• Automatically, when critical temperature or voltage trigger limits have been
reached
   