Power Saving Mode (Psm); Extended Mode Drx (E-Drx); Current Consumption - SimCom SIM7020C Hardware Design

5.3.4

Power Saving Mode (PSM)

SIM7030 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 the 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 29: RTC_GPIO0/RTC_EINT characteristics
IO
RTC_EINT
RTC_EINT
IO
RTC_GPIO0
RTC_GPIO0
5.3.5

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.
5.4

Current Consumption

The current consumption is listed in the table below.
Table 30: Current consumption on VBAT Pins (VBAT=3.3V)
Sleep/Idle Mode
LTE supply current
(without USB connection)
Power Saving Mode
PSM supply current
eDRX
SIM7020_Hardware_Design_V1.02
Vih(min). Vih(max).
1.575
2.1
2.725
3.6
Voh(min). Voh(max).
1.785 -
3.085 -
Sleep mode Typical: 236uA (at+cfun=0)
Idle mode Typical: 5.6mA
PSM mode Typical: 3.4uA
37
Smart Machine Smart Decision
Vil(min). Vil(max).
0 0.525
0 0.905
Vol(min). Vol(max).
- 0.315
- 0.545
VBAT
2.1(min)
3.6(max)
VBAT
2.1(min)
3.6(max)
2018-07-25