User's Manual

8
RAK2245 Pi HAT
8
RAK2245 Pi HAT User Manual V1.2
2.5 SPI Interface
The pin connector provides an SPI connection which allows direct access to the
Sx1301 SPI interface. This gives the target system the possibility to use existing SPI
interfaces to communicate with the module.
Note: Please reset SX1301 via PIN 11 after turning on RAK2245 Pi HAT.
2.6
UART and I2C
UART and I2C connections are also included on the pin connector. These connections
allow direct access to the GPS module. The 1PPS is connected internally to SX1301.
2.7
Digital IOs
There are two digital IO PINs, which give the user an interface to reset the GPS module
or set it into standby mode.
2.8 LEDs
3 x Green LED for indicating the status of PWR, TX, RX.
2.9 Antenna RF Interface
The modules have two RF interfaces for LoRa and GPS antennas over the standard
UFL connectors (Hirose U. FL-R-SMT). It has a characteristic impedance of 50OHM
and supports both Tx and Rx via RF ports, providing the antenna interface.
2.10 Electrical Characteristics
The following are the electrical characteristics of RAK2245 Pi HAT. Please contact us if
you need other details and/or parameter for your project.
2.10.1 Absolute Maximum Rating
The values and range given below are all in accordance with Absolute
Maximum Rating System (IEC 134).