Sierra Wireless EM9190, Руководство по интеграции оборудования

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41113915 Rev 0.3 June 17, 2020 7
AirPrime EM9190 Hardware Integration Guide Power
State Details
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Low Power
(Airplane Mode)

Module is active

Module enters this state:

Under host interface control:

Host issues AT+CFUN=0 (3GPP TS 27.007), or

Host asserts W_DISABLE#, 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.
✓
- -
Off

Host keeps module powered off by asserting Full_Card_Power_Off#
(signal pulled low or left floating)

Module draws minimal current
✓
- -
Disconnected
Host power source is disconnected from the module and all voltages
associated with the module are at 0 V.
- - -
2.2.1. Power State Transitions
The module uses state machines to monitor supply voltage and operating temperature and notifies
the host when critical threshold limits are exceeded. (See
Table 2-3 for trigger details and Figure 2-1
for state machine behavior.)
Power state transitions may occur:

Automatically, when critical supply voltage or module temperature trigger levels are encountered.

Under host control, using available AT commands in response to user choices (for example,
opting to switch to airplane mode) or operating conditions.
Table 2-3 Power State Transition Trigger Levels
Transition
Voltage Temperature
1
Notes
Trigger V Trigger
℃
Normal to Low Power
VOLT_HI_CRIT 4.6 TEMP_LO_CRIT -45
RF activity suspended
VOLT_LO_CRIT 2.9 TEMP_HI_CRIT 118
Low Power to Normal VOLT_HI_NORM 4.4 TEMP_NORM_LO -30
RF activity resumed
Low Power to Normal
Or Remain in Normal
(Remove warnings)
VOLT_LO_NORM 3.135 TEMP_HI_NORM 100
Normal
(Issue warning)
VOLT_LO_WARN 3.135 TEMP_HI_WARN 100
In the TEMP_HI_WARN state, the
module may have reduced
performance (Class B temperature
range).
Power off/on
(Host-initiated)
- - - -
Power off recommended when
supply voltage or module operating
temperature is critically low or high.