At+Cfun; At*E2Reset; How To Lower Power Consumption - Wavecom Gx64 Application Note

3.2.5

AT+CFUN

This AT-command is used to change the power state of the Wireless CPU.
See the AT-command manual for more details.
3.2.6

AT*E2RESET

This AT-command will de-register from network and do the normal shut-down
sequence, but instead of powering down jump to the reset vector.
See the AT-command manual for more details.
3.3

How to lower power consumption

The Wireless CPUs are capable of being set to low current consumption mode where
the average current consumption can be as low as 1.4mA. This mode is referred to as
"sleep mode". The actual current consumed depends on the base station DRX-mode
setting, which cannot be controlled by the Wireless CPU.
The features that determine the "sleep mode"-setting are the communication
channels UART and USB. The reason for this is that they cannot operate unless the
main 13MHz clock is available. To get the power consumption down the Wireless CPU
must disable the 13MHz clock and instead run of the 32kHz RTC. This means that a
handshake method has to be used for the UART (see
- UART Sleep Protocol
The USB feature is not supported in all SW-versions. Contact your local FAE if USB-
support is needed. USB will have its own Application Note. Ensure that the USB-
interface is disabled if is not used (AT*USB=0).
Power State
Power down
Power down
Sleep mode
Standby
Gx64 APPLICATION NOTE
Power Management
Page: 16/30
), and USB has to support "suspend-resume".
Condition
VRTC open (no backup battery)
VRTC active (backup battery available)
DRX 2
UART active, USB inactive (AT*USB=0)
UART active, USB active (AT*USB=1)
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GR/GS64 Series Application Note
Current
<10
<1.6
<3.5
~25
~35
Unit
μA
mA
mA
mA
mA