User's Manual

Smart Machine Smart Decision
SIM7020G_User Manual_V1.00 43 2019-01-15
and USB are still accessible, but RF function will be unavailable.
When SIM7020G is in minimum functionality or flight mode, it can return to full functionality by the
AT command “AT+CFUN=1”.
6.3.4 Power Saving Mode (PSM)
SIM7020G module can enter into PSM for reducing its power consumption. The mode is similar to
power-off, but the module remains registered on the network and there is no need to re-attach or
re-establish the network connections. So in PSM all the functions will be unavailable except the RTC
function, module cannot immediately respond users’ requests.
In PSM, RTC_GPIO0 will change state from low to high if RTC_EINT receive interrupt event.
Either of the following methods will wake up the module from PSM:
⚫ Pulling PWRKEY or RTC_EINT to low level will wake up the module.
⚫ When T3412 timer expires, the module will be automatically woken up.
Power domain of RTC_GPIO0 and RTC_EINT is VBAT, please consider the electrical
characteristics when connecting to external IO (suggest to use trigger as low-active).
Table 33: RTC_GPIO0/RTC_EINT characteristics
IO
Vih(min).
Vih(max).
Vil(min).
Vil(max).
VBAT
RTC_EINT
1.575
2.1
0
0.525
2.1(min)
RTC_EINT
2.725
3.6
0
0.905
3.6(max)
IO
Voh(min).
Voh(max).
Vol(min).
Vol(max).
VBAT
RTC_GPIO0
1.785
-
-
0.315
2.1(min)
RTC_GPIO0
3.085
-
-
0.545
3.6(max)
6.3.5 Extended Mode DRX (e-DRX)
In idle or sleep mode, module and the network may negotiate over non-access stratum signaling the
use of extended mode DRX for reducing power consumption.
6.4 Current Consumption
The current consumption is listed in the table below.
Table 34: Current consumption on VBAT Pins (VBAT=3.3V)
Sleep/Idle Mode
LTE supply current
(without USB connection)
Sleep mode Typical: 236uA (at+cfun=0)
Idle mode Typical: 5.6mA