Specifications

22 CY8CKIT-042 PSoC 4 Pioneer Kit Guide, Doc. # 001-86371 Rev. *D
Kit Operation
Figure 3-9. MiniProg3 Configuration
3.3 USB-UART Bridge
The onboard PSoC 5LP can also act as a USB-UART bridge to transfer and receive data from the
PSoC 4 device to the PC via the COM terminal software. When the USB mini-B cable is connected
to J10 of the PSoC 4 Pioneer Kit, a device named KitProg USBUART is available under Ports
(COM & LPT) in the device manager. For more details about the USB-UART functionality, see Using
PSoC 5LP as USB-UART Bridge on page 63.
To use the USB-UART functionality in the COM terminal software, select the corresponding COM
port as the communication port for transferring data to and from the COM terminal software.
The UART lines from PSoC 5LP are brought to the P12[6] (J8_9) and P12[7] (J8_10) pins of header
J8. This interface can be used to send or receive data from any PSoC 4 design that has a UART by
connecting the pins on header J8 to the RX and TX pins assigned in PSoC 4. The UART can be
used as an additional interface to debug designs. This bridge can also be used to interface with
other external UART-based devices. Figure 3-10 shows the connection between the RX and TX
lines of the PSoC 5LP and PSoC 4. In this example, the PSoC 4 UART has been routed to the J3
header; the user must connect the wires between the PSoC 5LP RX and TX lines available on
header J8.