8
RAK
2247
8
RAK2247 User Manual V1.1
2.6
Power Supply
RAK
2247
card must be supplied through the 3.3Vaux pins by a DC power supply. The
voltage must be stable, because during this operation the current drawn from 3.3Vaux
can vary significantly, based on the power consumption profile of the SX1301 chip
(see SX1301 DS).
2.7
SPI Interface
SPI interface is provided on the PCIe_SCK, PCIe_MISO, PCIe_MOSI, PCIe_CSN pins
of the system connector. The SPI interface gives access to the configuration register of
SX1301 via a synchronous full-duplex protocol. Only the slave side is implemented.
Note: RAK
2247
-USB version don't have this interface.
2.8
USB Interface
RAK2247
card can support the high speed USB to SPI by FT2232HL, it includes a
USB 2.0 compliant interface with maximum 480 Mb/s data rate, representing the
interface for any communication with an external host application processor. The
module itself acts as a USB device and can be connected to any USB host equipped
with compatible drivers. For more information, please refer to the data sheet of
FT2232HL.
Note: RAK2247-SPI version don't have this interface.
2.9
GPS_PPS
RAK
2247
card includes the GPS_PPS input for received packets time-stamped.
2.10
RESET
RAK
2247
card includes the RESET active-high input signal to reset the radio
operations as specified by the SX1301 Specification.
