SARA-N2 series - Data Sheet

UBX-15025564 - R16

Interfaces

Page 10 of 30

communication with external chips and sensors. The interface provides master mode bi-directional

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.

Function

Description

Default GPIO

Configurable GPIOs

Network status

indication

Network status: registered home network, registered

roaming, data transmission, no service

--

CTS

RING indicator

Indicates an incoming message received by the module

or an URC event

--

CTS

Secondary UART

Secondary UART data output for diagnostic purpose,

to capture diagnostic logs delivered by the module

GPIO1

GPIO1

Pin disabled

Tri-state with an internal active pull-down enabled

CTS

CTS

Table 4: GPIO custom functions configuration