Pin Port Definition：
1. CSB, MOSI, MISO, CLK are SPI programmer interfaces. One-to-one correspondent with the SPI interface of the CSR Bluetooth chipset.
2. 3V3 port can output a current of 300 mA while 1.8V should not be used as output power port.
3. SPI electrical level can be 1.8V or 3.3V.（Please select the SPI electrical level per the request of the testing board）
Install the CSR usb-spi driver：
1.Double-click the installbluesuite_2_6_8_1467.exe file to start the installation
When the Computer Identifies This CSR USB-SPI Successfully：
After being plugged into the USB port of the PC, this product could be found in the Device Manager. See the reference photo below：