Integration Guide

Rev. 2 January 2021 7 41114156
2
2: Power
Power Supply
The host provides power to the MC7411 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, refer to the AirPrime
MC7411 Product Technical Specification.
Module Power States
The module has five 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 Radio enabled
Normal
(Default state)
• Module is active
• Default state when VCC is first applied in the absence of W_DISABLE_N control
• 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:
· Host issues AT+CFUN=0 ([1] AT Command Set for User Equipment (UE)
(Release 6) (Doc# 3GPP TS 27.007))), or
· Host issues AT!PCOFFEN=0 (configures the modem to enter low power
mode when W_DISABLE_N is asserted), and then asserts W_DISABLE_N
• Automatically, when critical temperature or voltage trigger limits have been
reached
   
Sleep
• Normal state of module between calls or data connections
• Module cycles between wake (polling the network) and sleep, at network provider-
determined interval.
 

a

Disconnected
• Host power source is disconnected from the module and all voltages associated
with the module are at 0 V.
 

b

a. USB interface is suspended
b. USB interface is disconnected