Sierra Wireless AirPrime MC7354B, Руководство по интеграции оборудования

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4117529 Rev 1.0 June 12, 2015 9
Hardware Integration Guide Power Interface
2.3. Power States
The MC7354B mini card has four power states as detailed in the following table.
Table 3. Supported MC7354B 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 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
,
or

Host asserts
W_DISABLE_N, after
AT!PCOFFEN=0
has
been issued.

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.
   
Disconnected
Host power source is disconnected
from the module and all voltages
associated with the module are at 0 V.
   