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The module remains the ability to receive paging message, SMS and TCP/UDP data
Sleep Mode
from the network normally. In this mode, the current consumption is reduced to a low
level.
The module's power supply is shut down by its power management unit. In this mode,
Power OFF
the software is inactive, the serial interfaces are inaccessible, while the operating
Mode
voltage (connected to VBAT_RF and VBAT_BB) remains applied.
Power Saving
PSM is similar to power-off, but the module remains registered on the network and
Mode
there is no need to re-attach or re-establish PDN connections. The current
(PSM)
consumption is reduced to a minimized level.
Recovery
The module can burn firmware with an empty serial flash, or recover from firmware
Mode
malfunction. For more details, see Chapter 3.5.1.
NOTE
In e-I-DRX mode, it is recommended to use the main UART interface for data communication, as the use of
USB interface will increase power consumption.
Table 7: Overview of MCU Operating Modes
Mode
Details
Normal
Run
Stop mode achieves the lowest power consumption while retaining the content of SRAM
Stop
and registers.
The standby mode can achieve the lowest power consumption with some data retention
Standby
(up to 128 KB). and I/Os are latched.
The shutdown mode can achieve the lowest power consumption. The internal regulator is
Shutdown
switched off. The RTC can remain active. SRAM, registers and retention data are lost,
except for registers in the RTC domain.
3.5.1. Recovery Mode
BG952A-GL QuecOpen provides the recovery mode for firmware upgrade in emergency cases. Recovery
mode can force the module to boot via CLI UART interface for firmware upgrade.
The following preconditions can set the module into recovery mode.
1.
Short-circuit CLI_TXD2 and CLI_RXD2 pins.
2.
Drive PWRKEY low to turn on the module. In this case the module will enter recovery mode.
3.
After the module enters recovery mode successfully, disconnect the connection between CLI_TXD2
and CLI_RXD2.
BG952A-GL_QuecOpen_Hardware_Design
MCU performs user tasks.
LPWA Module Series
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