User's Manual

7
RAK2247
7
RAK2247 User Manual V1.0
50 GND GND GND N/A Ground Connect to ground
51 W_DISABLE2# PCIe_CSN I/O Host SPI CS
52 3.3Vaux 3.3Vaux 3.3Vaux I RAK2247 supply
input
Connect to 3.3 V
Table 2 | Pin Definition
2.4 Power Supply
RAK2247 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).
2.5 SPI Interface
A 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.
2.6
USB Interface
Note: RAK2247-SPI version don't have this interface.
RAK2247 card can support the high speed USB to SPI by FT2232HL, it includes a
high-speed 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.
2.7 1PPS
RAK2247 card includes the 1PPS input for received packets time-stamped.