Apollo Carrier Board
User Manual
15
www.terasic.com
September 22, 2020
2.7
USB Downstream Port
The Thunderbolt 3 controller on the Apollo carrier board not only allows the FPGA and Host PC to
establish PCIe interface connections through a Thunderbolt 3 cable, but also provides another
expansion port for a USB downstream port (See
). The purpose of this USB
downstream port is mainly for connecting the USB Blaster II circuit of the Apollo S10 board. When
the Apollo S10 module is connected to the carrier, user can use a mini USB cable to connect the
USB Blaster II circuit (a mini USB connector) on the Apollo S10 module and the USB downstream
connector (a Type A USB connector) of the carrier board (See
use a Thunderbolt 3 cable to allow the Host PC to establish a JTAG connection with the FPGA via
the USB downstream port of the carrier board to the USB Blaster II circuit of the module board. It
can eliminate the need for a mini USB cable to connect to the Host PC (See
).
Figure 2-11 Thunderbolt 3 expansion interface on the carrier board