User's Manual

TOBY-R2 series - Data Sheet
UBX-16005785 - R06 Interfaces
Page 16 of 41
2.8 GPIO
TOBY-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 TOBY-R2 series System Integration Manual [2] and GPIO section in 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
8
Enable/disable the supply of u-blox GNSS receiver
connected to the cellular module
--
GPIO1-GPIO4
GNSS data ready
8
Sense when u-blox GNSS receiver connected to the module
is ready for sending data by the DDC (I
2
C)
--
GPIO3
GNSS RTC sharing
8
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
8
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-GPIO3
All
Table 4: GPIO custom functions configuration
8
Not supported by “02” product versions.