Datasheet

LARA-R2 series - Data Sheet
UBX-16005783 - R15 Interfaces Page 18 of 48
2.8 GPIO
LARA-R2 series modules include 9 pins (GPIO1-GPIO5, I2S_TXD, I2S_RXD, I2S_CLK, I2S_WA) that can
be configured as general purpose input/output or to provide custom functions as summarized in Table
4 (for further details, see the LARA-R2 series System Integration Manual [2] and the GPIO section in
the u-blox AT Commands Manual [1]).
Function
Description
Default GPIO
Configurable GPIOs
Network status
indication
Network status: registered home network,
registered roaming, data transmission, no service
--
GPIO1-GPIO4
GNSS supply enable
15
Enable/disable the supply of u-blox GNSS receiver
connected to the cellular module
GPIO2
GPIO1-GPIO4
GNSS data ready
15
Sense when u-blox GNSS receiver connected to the
module is ready for sending data by the DDC (I
2
C)
GPIO3
GPIO3
GNSS RTC sharing
16
RTC synchronization signal to the u-blox GNSS
receiver connected to the cellular module
--
GPIO4
SIM card detection
External SIM card physical presence detection
GPIO5
GPIO5
SIM card hot
insertion/removal
Enable / disable SIM interface upon detection of
external SIM card physical insertion / removal
--
GPIO5
I
2
S digital audio interface
I
2
S digital audio interface
I2S_RXD, I2S_TXD,
I2S_CLK, I2S_WA
I2S_RXD, I2S_TXD,
I2S_CLK, I2S_WA
Wi-Fi control
16
Control of an external Wi-Fi chip or module
--
--
General purpose input
Input to sense high or low digital level
--
All
General purpose output
Output to set the high or the low digital level
GPIO4
All
Pin disabled
Tri-state with an internal active pull-down enabled
GPIO1
All
Table 4: GPIO custom functions configuration
15
Not supported by LARA-R204-02B and LARA-R211-02B-00 product versions: GPIO2 and GPIO3 pins are by default disabled
16
Not supported by “02” and “62” product versions