User Manual

Bluegiga Proprietary Version 1.0
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9 UART INTERFACE
WRAP THOR 2022-1 Universal Asynchronous Receiver Transmitter (UART) interface provides a
simple mechanism for communicating with other serial devices using the RS232 standard (1).
Figure 6: Universal Asynchronous Receiver
Four signals are used to implement the UART function, as shown in Figure 5. When WRAP THOR
2022-1 is connected to another digital device, UART_RX and UART_TX transfer data between the
two devices. The remaining two signals, UART_CTS and UART_RTS, can be used to implement
RS232 hardware flow control where both are active low indicators. All UART connections are
implemented using CMOS technology and have signalling levels of 0V and VDD_PADS.
UART configuration parameters, such as Baud rate and packet format, are set using WRAP THOR
2022-1 software.
Notes:
In order to communicate with the UART at its maximum data rate using a standard PC,
an accelerated serial port adapter card is required for the PC.
(1) Uses RS232 protocol but voltage levels are 0V to VDD_PADS, (requires external
RS232 transceiver IC)
Table 6: Possible UART Settings
WRAP THOR 2022-1