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SARA-N2 Datasheet(PDF) 10 Page - u-blox AG

Part # SARA-N2
Description  Power-optimized NB-IoT (LTE Cat NB1) modules
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Manufacturer  U-BLOX [u-blox AG]
Direct Link  https://www.u-blox.com/
Logo U-BLOX - u-blox AG

SARA-N2 Datasheet(HTML) 10 Page - u-blox AG

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SARA-N2 series - Data Sheet
UBX-15025564 - R16
Page 10 of 30
2.5.3 DDC (I2C) interface
DDC interface: I2C compatible interface available on the SCL and SDA pins of the module for the
communication with external chips and sensors. The interface provides master mode bi-directional
bus communication at a bit-rate up to 100 kb/s. The I2C interface requires external pull-up resistors.
The internal power domain used by the DDC (I2C) pins is V_INT (1.8 V).
The DDC (I2C) interface is not supported by "02" product versions.
2.6 GPIO
SARA-N2 series modules provide the following pins:
GPIO1 pin, working at the V_INT (1.8 V) voltage domain, supporting the Secondary UART data
output functionality (see section 2.5.2 and Table 4)
GPIO2 pin, working at the V_INT (1.8 V) voltage domain, not supported by "02" product versions
CTS pin, working at the VCC (3.6 V typical) voltage domain, supporting the Network status
indication and the RING indicator functionality (see section 2.5.1 and Table 4)
For more details about how the pins can be configured, see u-blox SARA-N2 series AT Commands
Manual [1], +UGPIOC, +URING AT commands.
For diagnostic purposes, connect a test point to the GPIO1 pin.
Default GPIO
Configurable GPIOs
Network status
Network status: registered home network, registered
roaming, data transmission, no service
RING indicator
Indicates an incoming message received by the module
or an URC event
Secondary UART
Secondary UART data output for diagnostic purpose,
to capture diagnostic logs delivered by the module
Pin disabled
Tri-state with an internal active pull-down enabled
Table 4: GPIO custom functions configuration

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