User manual

26 CY8CKIT-049-4xxx PSoC® 4 Prototyping Kit Guide, Doc. #: 001-90711 Rev. *G
Kit Operation
3.4 USB-UART Default Settings
The default configuration of the USB-Serial device on the CY8CKIT-049-4xxx prototyping kit is the
USB-UART mode. The CY8CKIT-049-4xxx also enables a default UART connection between the
USB-Serial device and the PSoC 4. This connection is indicated by two parallel 4-pin headers in the
middle of the board. The default pin connections are shown in Tab le 3-2 .
Figure 3-18. UART Pin Connections on CY8CKIT-049-4xxx
The USB-Serial device provides the PSoC 4 device with an interface to a PC. The USB-Serial
device enumerates as a COM port to allow any terminal software to be used to communicate with
the PSoC 4. To use the USB-UART functionality in the COM terminal software, select the
corresponding COM port. Note that if the USB-Serial device board is separated from the PSoC 4
board, you will still be able to use the USB-Serial device to communicate with any UART device
using the 4-pin header.
The USB-Serial device is by default configured as a USB-UART device with the following
specifications. The USB-UART settings can also be configured from the Cypress USB-Serial
Configuration Utility. The default setting are as shown in bold in the table below.
Table 3-1. Pin Mapping for USB-Serial Port and PSoC 4 UART
USB-Serial UART PSoC 4 UART
TX P4.0 (RX)
RX P4.1 (TX)
GND GND
VDD VDD
Table 3-2. USB-UART settings as seen in Cypress USB-Serial Configuration Utility
Parameter Supported Values
Baud Rate
100, 200, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400,
56000, 57600, 115200, 230400, 460800, 921600, 1000000, 3000000
Type 2 pin, 4 pin, 6 pin
Data Bits 7 bits, 8 bits
Stop Bits 1 bit, 2 bits
Parity None, Odd, Even, Mark, Space
Drop Packets on RX error Disabled, Enabled
Disable CTS and DSR pull-up during
suspend
Disabled, Enabled