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LARA-R6 series - Data sheet

UBX-21004391 - R09

Interfaces

Page 12 of 41

C1-Public

When LARA-R6 series modules are in power-off mode (switched off, with a voltage at the VCC module

supply input within the normal operating range reported in Table 12), they can be switched on by:

•

Forcing a low level at the PWR_ON input pin, which is normally set high by an internal pull-up, for

a valid time period (see section 4.2.9, module switch-on). The PWR_ON line is intended to be driven

by open drain, open collector, or contact switch.

☞ It is recommended to provide accessible test point directly connected to the PWR_ON input pin.

2.3.2 Module power-off

LARA-R6 series can be properly switched off, with storage of the current parameter settings in the

module’s internal non-volatile memory and a clean network detach, in one of these ways:

•

AT+CPWROFF command (see the AT commands manual [1]).

•

Forcing a low pulse at the PWR_ON input pin, which is normally set high by an internal pull-up, for

a valid time period (see section 4.2.9, module graceful switch-off). The PWR_ON line is intended to

be driven by open drain, open collector or contact switch.

An faster and safe emergency power-off procedure of LARA-R6 series modules with storage of the

current parameter settings and without a clean network detach can be triggered by:

• AT+CFUN=10 command (see the AT commands manual [1]).

• Toggling the GPIO input pin configured with the fast and safe power-off function (see section 2.8)

An abrupt shutdown occurs on LARA-R6 series modules, without storage of the current parameter

settings and without a clean network detach, when:

•

The VCC supply drops below the extended operating range minimum limit

•

Forcing a low level at the RESET_N input pin, which is normally set high by an internal pull-up, for

a valid time period (see 4.2.10, module abrupt emergency switch-off). The RESET_N line is

intended to be driven by open drain, open collector or contact switch.

An over-temperature or an under-temperature shutdown occurs on LARA-R6 series modules when

the temperature measured within the cellular module reaches the dangerous area if the optional

Smart Temperature Supervisor feature is enabled and configured by the dedicated AT command. For

more details, see 4.2.15 and the +USTS AT command description in the AT commands manual [1].

2.3.3 Module reset

LARA-R6 series modules can be reset (rebooted), with storage of the current parameter settings in

the module’s internal non-volatile memory and a clean network detach, by:

•

AT+CFUN=16 command (see the AT commands manual [1] for description and other options).

•

Forcing a low level at the RESET_N input pin, which is normally set high by an internal pull-up, for

a valid time period (see 4.2.10, module reset / reboot). The RESET_N line is intended to be driven

by open drain, open collector or contact switch.

2.4 SIM interface

2.4.1 SIM card / chip interface

LARA-R6 series modules include an interface to connect an external SIM card / chip over the VSIM,

SIM_IO, SIM_CLK, SIM_RST pins: the high-speed SIM/ME interface is implemented as well as the

automatic detection of the required SIM supporting voltage.

Both 1.8 V and 3.0 V SIM types are supported (1.8 V and 3.0 V ME). Activation and deactivation with

automatic voltage switch from 1.8 V to 3.0 V is implemented, according to ISO-IEC 7816-3 specs.

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