Datasheet
Table Of Contents
- Document Information
- Contents
- 1 Functional description
- 2 Interfaces
- 3 Pin definition
- 4 Electrical specifications
- 4.1 Absolute maximum rating
- 4.2 Operating conditions
- 4.2.1 Operating temperature range
- 4.2.2 Supply/power pins
- 4.2.3 Current consumption
- 4.2.4 LTE RF characteristics
- 4.2.5 3G RF characteristics
- 4.2.6 2G RF characteristics
- 4.2.7 ANT_DET pin
- 4.2.8 PWR_ON pin
- 4.2.9 RESET_N pin
- 4.2.10 SIM pins
- 4.2.11 USB pins
- 4.2.12 HSIC pins
- 4.2.13 DDC (I2C) pins
- 4.2.14 Generic Digital Interfaces pins
- 5 Mechanical specifications
- 6 Qualification and approvals
- 7 Product handling & soldering
- 8 Default settings
- 9 Labeling and ordering information
- Appendix
- A Glossary
- Related documents
- Revision history
- Contact
LARA-R2 series - Data Sheet
UBX-16005783 - R15 Interfaces Page 13 of 48
2.3.3 Module reset
LARA-R2 series modules can be reset (rebooted) by:
AT+CFUN command (see the u-blox AT Commands Manual [1]). This causes an “internal” or
“software” reset of the module. The current parameter settings are saved in the module’s non-
volatile memory and a proper network detach is performed.
An abrupt “external” or “hardware” reset occurs when a low level is applied to the RESET_N pin, which
is normally set high by an internal pull-up, for a valid time period (see the section 4.2.9). This causes
an “external” or “hardware” reset of the entire module, including the integrated power management
unit, except for the RTC internal block: the V_INT generic digital interfaces supply is switched off and
all the digital pins are tri-stated, but the V_BCKP supply and the RTC block are enabled. The current
parameter settings are not saved in the module’s non-volatile memory and a proper network detach
is not performed. The RESET_N line should be driven by open drain, open collector or contact switch.
2.3.4 Module / host configuration selection
☞ The functionality of the HOST_SELECT pin is not supported by “02” and “62” product versions.
The modules include one pin (HOST_SELECT) to select the module / host application processor
configuration: the pin is available to select, enable, connect, disconnect and subsequently reconnect
the HSIC interface.
2.4 SIM
2.4.1 SIM interface
A SIM card interface is provided on 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 V SIM types are supported (1.8 V and 3 V ME). Activation and deactivation with
automatic voltage switch from 1.8 V to 3 V is implemented, according to ISO-IEC 7816-3 specifications.
The SIM driver supports the PPS procedure for baud-rate selection, according to the values proposed
by the SIM card/chip.
2.4.2 SIM detection
LARA-R2 series modules provide the SIM detection function over the GPIO5 pin to sense the SIM card
physical presence (as an optional feature) when the pin of the module is properly connected to the
mechanical switch of the SIM car holder. For more details, see the LARA-R2 series System Integration
Manual [2].