LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 25 / 76
Table 5: Overview of Operating Modes
1. During e-I-DRX, it is recommended to use UART interface for data communication, as the use of USB
interface will increase power consumption.
2. W_DISABLE# function is still under development.
3.4. Power Saving
3.4.1. Airplane Mode
When the module enters into airplane mode, the RF function does not work, and all AT commands
correlative with RF function will be inaccessible. This mode can be set via the following ways.
Mode
Details
Normal
Operation
Connected
Network has been connected. In this mode, the power consumption
may vary with the network setting and data transfer rate.
Idle
Software is active. The module remains registered on network, and it
is ready to send and receive data.
Extended Idle
Mode DRX
(e-I-DRX)
BG77 module and the network may negotiate over non-access stratum signaling the
use of e-I-DRX for reducing power consumption, while being available for mobile
terminating data and/or network originated procedures within a certain delay
dependent on the DRX cycle value.
Airplane Mode
AT+CFUN=4
or W_DISABLE# pin can set the module into airplane mode. In this case,
RF function will be invalid.
Minimum
Functionality
Mode
AT+CFUN=0
can set the module into a minimum functionality mode without removing
the power supply. In this case, both RF function and (U)SIM card will be invalid.
Sleep Mode*
In this mode, the current consumption of the module will be reduced to a lower level.
During this mode, the module can still receive paging message, SMS and TCP/UDP
data from the network normally.
Power Saving
Mode
(PSM)
BG77 module may enter into Power Saving Mode to further reduce its power
consumption. PSM is similar to power-off, but the module remains registered on the
network and there is no need to re-attach or re-establish PDN connections.
Power OFF
Mode
In this mode, the power management unit shuts down the power supply. Software is
not active. The serial interfaces are not accessible. But the operating voltage
(connected to VBAT) remains applied.
NOTES
