![Ublox TOBY-L2 series Скачать руководство пользователя страница 33](http://html1.mh-extra.com/html/ublox/toby-l2-series/toby-l2-series_system-integration-manual_3394985033.webp)
TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28
System description
Page 33 of 164
describes TOBY-L2 power-off sequence by means of AT+CPWROFF with following phases:
When the +CPWROFF AT command is sent, the module starts the switch-off routine.
The module replies OK on the AT interface: the switch-off routine is in progress.
At the end of the switch-off routine, all the digital pins are tri-stated and all the internal voltage
regulators are turned off, including the generic digital interfaces supply (V_INT), except the RTC
supply (V_BCKP).
Then, the module remains in power-off mode as long as a switch on event does not occur (e.g.
applying a proper low level to the PWR_ON input, or applying a proper low level to the RESET_N
input), and enters not-powered mode if the supply is removed from the VCC pins.
VCC
V_BCKP
PWR_ON
RESET_N
V_INT
Internal Reset
System State
BB Pads State
Operational
OFF
Tristate / Floating
ON
Operational →
Tristate
AT+CPWROFF
sent to the module
OK
replied by the module
VCC
can be removed
Figure 15: TOBY-L2 series power-off sequence description
☞
The Internal Reset signal is not available on a module pin, but it is recommended monitoring the
V_INT pin to sense the end of the internal switch-off sequence: the VCC supply of the module can
be removed only after V_INT goes low.
describes the MPCI-L2 power-off procedure with the following phases:
When the AT+CFUN=127 command is issued, the module starts the halt mode setting routine.
The module replies OK on the AT interface: after this, the module is set in the halt mode.
Then, the module remains in the Halt mode and enters not-powered mode if the supply is removed
from the 3.3Vaux pins.
3.3Vaux
PERST#
Internal Reset
System State
BB Pads State
OFF
ON
Tristate / Floating
Operational
AT+CFUN=127
sent to the module
OK
replied by the module
3.3Vaux
can be removed
Figure 16: MPCI-L2 series power-off procedure description
☞
The duration of each phase in the TOBY-L2 and MPCI-L2 series modules’ switch-off routines can
largely vary depending on the application / network settings and the concurrent module activities.